{"id":1871,"date":"2024-09-30T17:09:21","date_gmt":"2024-09-30T15:09:21","guid":{"rendered":"https:\/\/www.dunasys.com\/actualites\/non-classe\/on-board-diagnostic-comprendre-le-diagnostic-embarque\/"},"modified":"2026-07-09T12:04:48","modified_gmt":"2026-07-09T10:04:48","slug":"on-board-diagnostic-understanding-onboard-diagnostics","status":"publish","type":"post","link":"https:\/\/www.dunasys.com\/en\/actualites\/technology\/on-board-diagnostic-understanding-onboard-diagnostics\/","title":{"rendered":"On-Board Diagnostic: Understanding Onboard Diagnostics"},"content":{"rendered":"\n\n\n\n<section class=\"block-hero block-hero-articles-dunasys\"\n        >\n            <div class=\"block-hero-articles-dunasys_breadcrumb\">\n            <div class=\"container\">\n                            <div class=\"breadcrumb\">\n            <ul class=\"breadcrumb-list\">\n                                                                                                                                            <li class=\"breadcrumb-list_item\">\n                    <a href=\"https:\/\/www.dunasys.com\/en\/\">Home<\/a>\n                <\/li>\n                                    <li class=\"breadcrumb-list_item\">On-Board Diagnostic: Understanding Onboard Diagnostics<\/li>\n                            <\/ul>\n        <\/div>\n    \n            <\/div>\n        <\/div>\n        <div class=\"block-hero-articles-dunasys_content\">\n        <div class=\"container\">\n            <div class=\"grid\">\n                <div class=\"grid_title\">\n                                    \n                                \n                                        \n                                \n                    \n            <h1\n        class=\"title title-hero js-text-gradient-scroll\"\n                 data-gradient-duration=\"2.5\"        >On-Board Diagnostic: Understanding Onboard Diagnostics<\/h1>\n    \n                                                \n                                    \n                \n        <div class=\"editor\"\n        >\n        On-Board Diagnostic (OBD) is an essential technology in the modern automotive world. <a href=\"https:\/\/www.dunasys.com\/en\/actualites\/technology\/on-board-diagnostic-understanding-onboard-diagnostics\/\" class=\"read-more\">Read More<\/a>\n        <\/div>\n    \n                    <div class=\"meta\">\n                                                    <div class=\"author\">Par Bastien Jaffre<\/div>\n                                                <div class=\"date\">Le 30 September 2024<\/div>\n                    <\/div>\n                <\/div>\n                                    <div class=\"grid_thumb\">\n                                    \n                                                                                                                                            \n                <picture class=\"post-img-wrapper\">\n\n                                        <source media=\"(min-width: 1024px)\" srcset=\"https:\/\/www.dunasys.com\/wp-content\/uploads\/2024\/09\/post-883__on-board-diagnostic-comprendre-le-diagnostic-embarque-1200x0-c-default.webp 1x, https:\/\/www.dunasys.com\/wp-content\/uploads\/2024\/09\/post-883__on-board-diagnostic-comprendre-le-diagnostic-embarque-2400x0-c-default.webp 2x\">\n\n                                        <source media=\"(min-width: 768px)\" srcset=\"https:\/\/www.dunasys.com\/wp-content\/uploads\/2024\/09\/post-883__on-board-diagnostic-comprendre-le-diagnostic-embarque-800x0-c-default.webp 1x, https:\/\/www.dunasys.com\/wp-content\/uploads\/2024\/09\/post-883__on-board-diagnostic-comprendre-le-diagnostic-embarque-1600x0-c-default.webp 2x\">\n\n                                        <img decoding=\"async\" src=\"https:\/\/www.dunasys.com\/wp-content\/uploads\/2024\/09\/post-883__on-board-diagnostic-comprendre-le-diagnostic-embarque-400x0-c-default.webp\"\n                         srcset=\"https:\/\/www.dunasys.com\/wp-content\/uploads\/2024\/09\/post-883__on-board-diagnostic-comprendre-le-diagnostic-embarque-400x0-c-default.webp 1x, https:\/\/www.dunasys.com\/wp-content\/uploads\/2024\/09\/post-883__on-board-diagnostic-comprendre-le-diagnostic-embarque-800x0-c-default.webp 2x\"                         alt=\"Post 883 On Board Diagnostic Comprendre Le Diagnostic Embarque\"\n                          width=\"1000\"                           height=\"619\"                           class=\"post-img\"                                                       fetchpriority=\"high\" loading=\"eager\"\n                                             >\n                <\/picture>\n                        \n                    <\/div>\n                            <\/div>\n        <\/div>\n    <\/div>\n<\/section>\n\n\n\n\n<section    \n        class=\"block-editor block-editor-post\"\n        >\n    <div class=\"container\">\n        <div class=\"grid\">\n            <div class=\"grid_content\">\n                <div class=\"editor\"><p class=\"font-claude-response-body break-words whitespace-normal\">On-Board Diagnostic (OBD) is an essential technology in the modern automotive world. Used primarily to monitor and diagnose vehicle issues, it has transformed the way drivers and technicians interact with car systems.<\/p>\n<p>&nbsp;<\/p>\n<h2>What is the On-Board Diagnostic system?<\/h2>\n<p class=\"font-claude-response-body break-words whitespace-normal\">The On-Board Diagnostic system, often abbreviated as OBD, is an electronic diagnostic tool built into modern vehicles. This system collects and records data from the various electronic systems in the car. It monitors the condition of the engine, emissions, and other parameters essential to the vehicle&#8217;s proper operation. Through a connector usually located under the dashboard, technicians can access the stored information and quickly diagnose problems.<\/p>\n<p>&nbsp;<\/p>\n<h2>The evolution and standards of the OBD system<\/h2>\n<p class=\"font-claude-response-body break-words whitespace-normal\">OBD has evolved over the years, moving from OBD-I to OBD-II, which became the standard in the United States in 1996 and in Europe in 2001. The OBD-II system is far more advanced, offering a standardized interface for reading diagnostic trouble codes (DTCs). These codes are crucial for identifying potential issues and ensuring proper vehicle maintenance.<\/p>\n<p>&nbsp;<\/p>\n<h2>The benefits of OBD for the vehicle<\/h2>\n<p class=\"font-claude-response-body break-words whitespace-normal\">The OBD system offers numerous benefits, for both drivers and technicians:<\/p>\n<ul>\n<li class=\"font-claude-response-body break-words whitespace-normal\"><strong>Early detection of problems:<\/strong> OBD makes it possible to catch issues before they become serious, helping to prevent costly repairs.<\/li>\n<li class=\"font-claude-response-body break-words whitespace-normal\"><strong>Improved engine performance:<\/strong> by monitoring engine performance in real time, the OBD system helps maintain optimal operation.<\/li>\n<li class=\"font-claude-response-body break-words whitespace-normal\"><strong>Reduced emissions:<\/strong> the system monitors vehicle emissions and helps ensure they stay within limits set by environmental standards.<\/li>\n<li class=\"font-claude-response-body break-words whitespace-normal\"><strong>Easier diagnostics:<\/strong> thanks to diagnostic trouble codes, technicians can quickly and accurately identify problems, reducing repair time.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h2>How to use the OBD system<\/h2>\n<p class=\"font-claude-response-body break-words whitespace-normal\">To use the OBD system, you need a diagnostic tool, often called a diagnostic scanner. This tool connects to the vehicle&#8217;s OBD port to read the diagnostic trouble codes. These codes, which vary from one car model to another, provide valuable information about the condition of the electronic systems and allow problems to be diagnosed quickly.<\/p>\n<h3>The main components of OBD<\/h3>\n<p class=\"font-claude-response-body break-words whitespace-normal\">To fully understand how the On-Board Diagnostic (OBD) system works, it&#8217;s important to know its main components. Each plays a crucial role in monitoring and diagnosing the vehicle&#8217;s electronic systems. Here&#8217;s an overview of the key elements:<\/p>\n<ul>\n<li class=\"font-claude-response-body break-words whitespace-normal\"><strong>OBD connector:<\/strong> the physical access point to the OBD system, usually located under the dashboard.<\/li>\n<li class=\"font-claude-response-body break-words whitespace-normal\"><strong>Electronic interface:<\/strong> the module that communicates with the vehicle&#8217;s control units to collect and transmit data.<\/li>\n<li class=\"font-claude-response-body break-words whitespace-normal\"><strong>DTC codes:<\/strong> the diagnostic codes that indicate potential problems.<\/li>\n<\/ul>\n<figure id=\"attachment_4888\" aria-describedby=\"caption-attachment-4888\"><\/figure>\n<h2>The importance of OBD in vehicle maintenance<\/h2>\n<p class=\"font-claude-response-body break-words whitespace-normal\">The OBD system has become an essential tool for automotive technicians and vehicle owners alike. Beyond making it easier to diagnose problems, it plays a key role in monitoring emissions and ensuring compliance with environmental regulations. For drivers, it provides peace of mind by helping to guarantee that their vehicle runs efficiently and safely.<\/p>\n<p class=\"font-claude-response-body break-words whitespace-normal\">In conclusion, the On-Board Diagnostic system is a key element of modern automotive technology. It not only allows problems to be diagnosed quickly but also helps ensure your vehicle meets safety and emissions standards. To get the most out of your car, make sure you understand and use your OBD system correctly.<\/p>\n<h2>DUNASYS&#8217;s innovation in the field of OBD<\/h2>\n<p>In a sector as competitive and fast-moving as On-Board Diagnostic, DUNASYS stands out as a key player. With deep expertise in <a href=\"https:\/\/www.dunasys.com\/en\/dunasys-technology\/\">embedded networks<\/a>, diagnostic technologies, and <a href=\"https:\/\/www.dunasys.com\/en\/dunasys-telematics\/\">telematics<\/a>, DUNASYS offers innovative solutions tailored to the specific needs of vehicle manufacturers and technicians. Our know-how allows us to design sophisticated diagnostic tools that meet the latest standards while delivering greater performance and precision. Through close collaboration with our clients, we help optimize predictive vehicle maintenance, reducing unexpected breakdowns and improving emissions management.<\/p>\n<p>&nbsp;<\/p>\n<\/div>\n            <\/div>\n        <\/div>\n    <\/div>\n<\/section>\n\n\n\n\n<section    \n        class=\"block-faq block-faq-1 block-faq-3-dunasys\"\n        >\n    <div class=\"container\">\n        <div class=\"grid\">\n            <div class=\"grid_title\">\n                                \n                                \n                                        \n                        \n                    \n            <h2\n        class=\"title title-section\"\n                        >R\u00e9ponses \u00e0 vos questions<\/h2>\n    \n            <\/div>\n                            <div class=\"grid_content\">\n                                            <div class=\"accordion-item\">\n                            <div class=\"accordion-item_header\">\n                                <h3 class=\"question\">\n                                    <button class=\"question_btn\"\n                                            type=\"button\"\n                                            aria-expanded=\"false\"\n                                            aria-controls=\"faq-ans-block_c7454b604f5544a48df3d50b2dd1e552-1\"\n                                            id=\"faq-q-block_c7454b604f5544a48df3d50b2dd1e552-1\">\n                                        Qu\u2019est-ce que l\u2019On-Board Diagnostic (OBD) et \u00e0 quoi sert-il ?\n                                    <\/button>\n                                <\/h3>\n                                <div class=\"icon\">\n                                    <svg width=\"12\" height=\"18\" viewBox=\"0 0 12 18\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n                                        <line x1=\"5.68164\" y1=\"4.69898e-07\" x2=\"5.68164\" y2=\"15.7739\" stroke=\"white\" stroke-width=\"1.5\"\/>\n                                        <path d=\"M10.5312 10.9805L5.53125 15.9805L0.531259 10.9805\" stroke=\"white\" stroke-width=\"1.5\"\/>\n                                    <\/svg>\n                                <\/div>\n                            <\/div>\n                            <div class=\"accordion-item_content\"\n                                 id=\"faq-ans-block_c7454b604f5544a48df3d50b2dd1e552-1\"\n                                 role=\"region\"\n                                 aria-labelledby=\"faq-q-block_c7454b604f5544a48df3d50b2dd1e552-1\">\n                                                            \n                                    \n                \n        <div class=\"editor answer\"\n                                                        >\n        <div data-id=\"cf12035\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n<div>\n<p>Un\u00a0scanner OBD\u00a0permet d\u2019identifier ces\u00a0codes\u00a0et d\u2019effectuer les corrections n\u00e9cessaires avant un\u00a0contr\u00f4le technique.<\/p>\n<\/div>\n<\/div>\n<p>L\u2019OBD\u00a0est un\u00a0outil de diagnostic\u00a0\u00e9lectronique int\u00e9gr\u00e9 dans les\u00a0v\u00e9hicules\u00a0modernes permettant de surveiller en temps r\u00e9el le fonctionnement du\u00a0moteur\u00a0et des syst\u00e8mes li\u00e9s aux\u00a0\u00e9missions. Son r\u00f4le est d\u2019alerter le conducteur en cas de probl\u00e8me gr\u00e2ce \u00e0 un t\u00e9moin lumineux sur le tableau de bord et d\u2019enregistrer les\u00a0codes de diagnostic\u00a0permettant aux m\u00e9caniciens d\u2019identifier rapidement la source d\u2019un dysfonctionnement.<\/p>\n<p>Il existe plusieurs versions du\u00a0syst\u00e8me OBD\u00a0:<\/p>\n<ul>\n<li>OBD-I\u00a0: Premiers syst\u00e8mes de\u00a0diagnostics embarqu\u00e9s, apparus dans les ann\u00e9es 80.<\/li>\n<li>OBD-II\u00a0: Standardis\u00e9 depuis les ann\u00e9es 90, il est obligatoire sur les\u00a0voitures\u00a0en\u00a0Europe\u00a0et aux \u00c9tats-Unis.<\/li>\n<\/ul>\n\n        <\/div>\n    \n                            <\/div>\n                        <\/div>\n                                            <div class=\"accordion-item\">\n                            <div class=\"accordion-item_header\">\n                                <h3 class=\"question\">\n                                    <button class=\"question_btn\"\n                                            type=\"button\"\n                                            aria-expanded=\"false\"\n                                            aria-controls=\"faq-ans-block_c7454b604f5544a48df3d50b2dd1e552-2\"\n                                            id=\"faq-q-block_c7454b604f5544a48df3d50b2dd1e552-2\">\n                                        Pourquoi l\u2019OBD est-il important ?\n                                    <\/button>\n                                <\/h3>\n                                <div class=\"icon\">\n                                    <svg width=\"12\" height=\"18\" viewBox=\"0 0 12 18\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n                                        <line x1=\"5.68164\" y1=\"4.69898e-07\" x2=\"5.68164\" y2=\"15.7739\" stroke=\"white\" stroke-width=\"1.5\"\/>\n                                        <path d=\"M10.5312 10.9805L5.53125 15.9805L0.531259 10.9805\" stroke=\"white\" stroke-width=\"1.5\"\/>\n                                    <\/svg>\n                                <\/div>\n                            <\/div>\n                            <div class=\"accordion-item_content\"\n                                 id=\"faq-ans-block_c7454b604f5544a48df3d50b2dd1e552-2\"\n                                 role=\"region\"\n                                 aria-labelledby=\"faq-q-block_c7454b604f5544a48df3d50b2dd1e552-2\">\n                                                            \n                                    \n                \n        <div class=\"editor answer\"\n                                                        >\n        <p>Le\u00a0diagnostic OBD\u00a0est crucial pour :<\/p>\n<ul>\n<li>D\u00e9tecter des anomalies li\u00e9es au\u00a0moteur\u00a0et aux\u00a0\u00e9missions.<\/li>\n<li>Pr\u00e9venir les pannes et r\u00e9duire les co\u00fbts de r\u00e9paration.<\/li>\n<li>V\u00e9rifier la conformit\u00e9 aux normes environnementales.<\/li>\n<li>Am\u00e9liorer l\u2019efficacit\u00e9 des interventions de maintenance.<\/li>\n<\/ul>\n\n        <\/div>\n    \n                            <\/div>\n                        <\/div>\n                                            <div class=\"accordion-item\">\n                            <div class=\"accordion-item_header\">\n                                <h3 class=\"question\">\n                                    <button class=\"question_btn\"\n                                            type=\"button\"\n                                            aria-expanded=\"false\"\n                                            aria-controls=\"faq-ans-block_c7454b604f5544a48df3d50b2dd1e552-3\"\n                                            id=\"faq-q-block_c7454b604f5544a48df3d50b2dd1e552-3\">\n                                        Est-ce que ma voiture a une prise OBD ?\n                                    <\/button>\n                                <\/h3>\n                                <div class=\"icon\">\n                                    <svg width=\"12\" height=\"18\" viewBox=\"0 0 12 18\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n                                        <line x1=\"5.68164\" y1=\"4.69898e-07\" x2=\"5.68164\" y2=\"15.7739\" stroke=\"white\" stroke-width=\"1.5\"\/>\n                                        <path d=\"M10.5312 10.9805L5.53125 15.9805L0.531259 10.9805\" stroke=\"white\" stroke-width=\"1.5\"\/>\n                                    <\/svg>\n                                <\/div>\n                            <\/div>\n                            <div class=\"accordion-item_content\"\n                                 id=\"faq-ans-block_c7454b604f5544a48df3d50b2dd1e552-3\"\n                                 role=\"region\"\n                                 aria-labelledby=\"faq-q-block_c7454b604f5544a48df3d50b2dd1e552-3\">\n                                                            \n                                    \n                \n        <div class=\"editor answer\"\n                                                        >\n        <p>La plupart des\u00a0v\u00e9hicules\u00a0produits apr\u00e8s 2001 pour les moteurs essence et apr\u00e8s 2004 pour les moteurs diesel sont \u00e9quip\u00e9s d\u2019un\u00a0syst\u00e8me OBD-II. La\u00a0prise OBD\u00a0est g\u00e9n\u00e9ralement situ\u00e9e sous le tableau de bord, pr\u00e8s du volant.<\/p>\n\n        <\/div>\n    \n                            <\/div>\n                        <\/div>\n                                            <div class=\"accordion-item\">\n                            <div class=\"accordion-item_header\">\n                                <h3 class=\"question\">\n                                    <button class=\"question_btn\"\n                                            type=\"button\"\n                                            aria-expanded=\"false\"\n                                            aria-controls=\"faq-ans-block_c7454b604f5544a48df3d50b2dd1e552-4\"\n                                            id=\"faq-q-block_c7454b604f5544a48df3d50b2dd1e552-4\">\n                                        Comment trouver la prise OBD dans un v\u00e9hicule ?\n                                    <\/button>\n                                <\/h3>\n                                <div class=\"icon\">\n                                    <svg width=\"12\" height=\"18\" viewBox=\"0 0 12 18\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n                                        <line x1=\"5.68164\" y1=\"4.69898e-07\" x2=\"5.68164\" y2=\"15.7739\" stroke=\"white\" stroke-width=\"1.5\"\/>\n                                        <path d=\"M10.5312 10.9805L5.53125 15.9805L0.531259 10.9805\" stroke=\"white\" stroke-width=\"1.5\"\/>\n                                    <\/svg>\n                                <\/div>\n                            <\/div>\n                            <div class=\"accordion-item_content\"\n                                 id=\"faq-ans-block_c7454b604f5544a48df3d50b2dd1e552-4\"\n                                 role=\"region\"\n                                 aria-labelledby=\"faq-q-block_c7454b604f5544a48df3d50b2dd1e552-4\">\n                                                            \n                                    \n                \n        <div class=\"editor answer\"\n                                                        >\n        <ol>\n<li>V\u00e9rifiez sous le tableau de bord, c\u00f4t\u00e9 conducteur.<\/li>\n<li>Regardez pr\u00e8s du levier de vitesse ou sous l\u2019accoudoir central.<\/li>\n<li>Consultez le manuel du propri\u00e9taire du\u00a0v\u00e9hicule\u00a0pour une localisation pr\u00e9cise.<\/li>\n<\/ol>\n\n        <\/div>\n    \n                            <\/div>\n                        <\/div>\n                                            <div class=\"accordion-item\">\n                            <div class=\"accordion-item_header\">\n                                <h3 class=\"question\">\n                                    <button class=\"question_btn\"\n                                            type=\"button\"\n                                            aria-expanded=\"false\"\n                                            aria-controls=\"faq-ans-block_c7454b604f5544a48df3d50b2dd1e552-5\"\n                                            id=\"faq-q-block_c7454b604f5544a48df3d50b2dd1e552-5\">\n                                        Comment faire un diagnostic OBD ?\n                                    <\/button>\n                                <\/h3>\n                                <div class=\"icon\">\n                                    <svg width=\"12\" height=\"18\" viewBox=\"0 0 12 18\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n                                        <line x1=\"5.68164\" y1=\"4.69898e-07\" x2=\"5.68164\" y2=\"15.7739\" stroke=\"white\" stroke-width=\"1.5\"\/>\n                                        <path d=\"M10.5312 10.9805L5.53125 15.9805L0.531259 10.9805\" stroke=\"white\" stroke-width=\"1.5\"\/>\n                                    <\/svg>\n                                <\/div>\n                            <\/div>\n                            <div class=\"accordion-item_content\"\n                                 id=\"faq-ans-block_c7454b604f5544a48df3d50b2dd1e552-5\"\n                                 role=\"region\"\n                                 aria-labelledby=\"faq-q-block_c7454b604f5544a48df3d50b2dd1e552-5\">\n                                                            \n                                    \n                \n        <div class=\"editor answer\"\n                                                        >\n        <p>R\u00e9aliser un\u00a0diagnostic OBD\u00a0est simple et ne n\u00e9cessite qu\u2019un\u00a0lecteur OBD\u00a0compatible avec votre\u00a0voiture. Voici les \u00e9tapes principales :<\/p>\n<ol>\n<li>Branchez le lecteur OBD\u00a0sur la\u00a0prise OBD\u00a0du\u00a0v\u00e9hicule.<\/li>\n<li>Allumez le moteur\u00a0et laissez tourner quelques instants.<\/li>\n<li>Lancez le diagnostic\u00a0via l\u2019interface du\u00a0lecteur OBD.<\/li>\n<li>Analysez les codes de diagnostic\u00a0affich\u00e9s.<\/li>\n<li>Interpr\u00e9tez les r\u00e9sultats\u00a0gr\u00e2ce aux bases de donn\u00e9es des fabricants ou via des applications d\u00e9di\u00e9es.<\/li>\n<\/ol>\n\n        <\/div>\n    \n                            <\/div>\n                        <\/div>\n                                            <div class=\"accordion-item\">\n                            <div class=\"accordion-item_header\">\n                                <h3 class=\"question\">\n                                    <button class=\"question_btn\"\n                                            type=\"button\"\n                                            aria-expanded=\"false\"\n                                            aria-controls=\"faq-ans-block_c7454b604f5544a48df3d50b2dd1e552-6\"\n                                            id=\"faq-q-block_c7454b604f5544a48df3d50b2dd1e552-6\">\n                                        Quels sont les codes d\u2019erreur OBD les plus courants ?\n                                    <\/button>\n                                <\/h3>\n                                <div class=\"icon\">\n                                    <svg width=\"12\" height=\"18\" viewBox=\"0 0 12 18\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n                                        <line x1=\"5.68164\" y1=\"4.69898e-07\" x2=\"5.68164\" y2=\"15.7739\" stroke=\"white\" stroke-width=\"1.5\"\/>\n                                        <path d=\"M10.5312 10.9805L5.53125 15.9805L0.531259 10.9805\" stroke=\"white\" stroke-width=\"1.5\"\/>\n                                    <\/svg>\n                                <\/div>\n                            <\/div>\n                            <div class=\"accordion-item_content\"\n                                 id=\"faq-ans-block_c7454b604f5544a48df3d50b2dd1e552-6\"\n                                 role=\"region\"\n                                 aria-labelledby=\"faq-q-block_c7454b604f5544a48df3d50b2dd1e552-6\">\n                                                            \n                                    \n                \n        <div class=\"editor answer\"\n                                                        >\n        <p>Les\u00a0codes de diagnostic\u00a0OBD sont class\u00e9s en plusieurs cat\u00e9gories :<\/p>\n<ul>\n<li>Pxxxx\u00a0: Probl\u00e8mes li\u00e9s au\u00a0moteur\u00a0et aux\u00a0\u00e9missions.<\/li>\n<li>Bxxxx\u00a0: Probl\u00e8mes de carrosserie et d\u2019\u00e9quipements.<\/li>\n<li>Cxxxx\u00a0: Probl\u00e8mes li\u00e9s au ch\u00e2ssis.<\/li>\n<li>Uxxxx\u00a0: Probl\u00e8mes de communication entre modules \u00e9lectroniques.<\/li>\n<\/ul>\n<p>Exemples de\u00a0codes d\u2019erreur courants\u00a0:<\/p>\n<ul>\n<li>P0420\u00a0: Probl\u00e8me de catalyseur inefficace.<\/li>\n<li>P0300\u00a0: D\u00e9tection de rat\u00e9s d\u2019allumage.<\/li>\n<li>P0171\u00a0: M\u00e9lange air\/carburant trop pauvre.<\/li>\n<\/ul>\n\n        <\/div>\n    \n                            <\/div>\n                        <\/div>\n                                            <div class=\"accordion-item\">\n                            <div class=\"accordion-item_header\">\n                                <h3 class=\"question\">\n                                    <button class=\"question_btn\"\n                                            type=\"button\"\n                                            aria-expanded=\"false\"\n                                            aria-controls=\"faq-ans-block_c7454b604f5544a48df3d50b2dd1e552-7\"\n                                            id=\"faq-q-block_c7454b604f5544a48df3d50b2dd1e552-7\">\n                                        Comment interpr\u00e9ter les codes OBD et r\u00e9parer son v\u00e9hicule ?\n                                    <\/button>\n                                <\/h3>\n                                <div class=\"icon\">\n                                    <svg width=\"12\" height=\"18\" viewBox=\"0 0 12 18\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n                                        <line x1=\"5.68164\" y1=\"4.69898e-07\" x2=\"5.68164\" y2=\"15.7739\" stroke=\"white\" stroke-width=\"1.5\"\/>\n                                        <path d=\"M10.5312 10.9805L5.53125 15.9805L0.531259 10.9805\" stroke=\"white\" stroke-width=\"1.5\"\/>\n                                    <\/svg>\n                                <\/div>\n                            <\/div>\n                            <div class=\"accordion-item_content\"\n                                 id=\"faq-ans-block_c7454b604f5544a48df3d50b2dd1e552-7\"\n                                 role=\"region\"\n                                 aria-labelledby=\"faq-q-block_c7454b604f5544a48df3d50b2dd1e552-7\">\n                                                            \n                                    \n                \n        <div class=\"editor answer\"\n                                                        >\n        <p>Une fois le\u00a0code OBD\u00a0obtenu, il est possible :<\/p>\n<ul>\n<li>De rechercher sa signification dans la documentation du\u00a0lecteur OBD.<\/li>\n<li>D\u2019utiliser des plateformes en ligne d\u00e9di\u00e9es aux\u00a0diagnostics auto.<\/li>\n<li>De consulter un professionnel pour un\u00a0diagnostic\u00a0approfondi et une r\u00e9paration ad\u00e9quate.<\/li>\n<\/ul>\n\n        <\/div>\n    \n                            <\/div>\n                        <\/div>\n                                            <div class=\"accordion-item\">\n                            <div class=\"accordion-item_header\">\n                                <h3 class=\"question\">\n                                    <button class=\"question_btn\"\n                                            type=\"button\"\n                                            aria-expanded=\"false\"\n                                            aria-controls=\"faq-ans-block_c7454b604f5544a48df3d50b2dd1e552-8\"\n                                            id=\"faq-q-block_c7454b604f5544a48df3d50b2dd1e552-8\">\n                                        Quelle est la r\u00e9glementation en Europe concernant l\u2019OBD ?\n                                    <\/button>\n                                <\/h3>\n                                <div class=\"icon\">\n                                    <svg width=\"12\" height=\"18\" viewBox=\"0 0 12 18\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n                                        <line x1=\"5.68164\" y1=\"4.69898e-07\" x2=\"5.68164\" y2=\"15.7739\" stroke=\"white\" stroke-width=\"1.5\"\/>\n                                        <path d=\"M10.5312 10.9805L5.53125 15.9805L0.531259 10.9805\" stroke=\"white\" stroke-width=\"1.5\"\/>\n                                    <\/svg>\n                                <\/div>\n                            <\/div>\n                            <div class=\"accordion-item_content\"\n                                 id=\"faq-ans-block_c7454b604f5544a48df3d50b2dd1e552-8\"\n                                 role=\"region\"\n                                 aria-labelledby=\"faq-q-block_c7454b604f5544a48df3d50b2dd1e552-8\">\n                                                            \n                                    \n                \n        <div class=\"editor answer\"\n                                                        >\n        <p>En\u00a0Europe, la norme\u00a0OBD-II\u00a0est obligatoire sur tous les\u00a0v\u00e9hicules\u00a0depuis les ann\u00e9es 2000 pour surveiller les\u00a0\u00e9missions polluantes. Cette r\u00e9gulation permet d\u2019assurer la conformit\u00e9 aux normes environnementales et d\u2019\u00e9viter des r\u00e9parations co\u00fbteuses.<\/p>\n\n        <\/div>\n    \n                            <\/div>\n                        <\/div>\n                                            <div class=\"accordion-item\">\n                            <div class=\"accordion-item_header\">\n                                <h3 class=\"question\">\n                                    <button class=\"question_btn\"\n                                            type=\"button\"\n                                            aria-expanded=\"false\"\n                                            aria-controls=\"faq-ans-block_c7454b604f5544a48df3d50b2dd1e552-9\"\n                                            id=\"faq-q-block_c7454b604f5544a48df3d50b2dd1e552-9\">\n                                        Quels sont les diff\u00e9rents modes OBD ?\n                                    <\/button>\n                                <\/h3>\n                                <div class=\"icon\">\n                                    <svg width=\"12\" height=\"18\" viewBox=\"0 0 12 18\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n                                        <line x1=\"5.68164\" y1=\"4.69898e-07\" x2=\"5.68164\" y2=\"15.7739\" stroke=\"white\" stroke-width=\"1.5\"\/>\n                                        <path d=\"M10.5312 10.9805L5.53125 15.9805L0.531259 10.9805\" stroke=\"white\" stroke-width=\"1.5\"\/>\n                                    <\/svg>\n                                <\/div>\n                            <\/div>\n                            <div class=\"accordion-item_content\"\n                                 id=\"faq-ans-block_c7454b604f5544a48df3d50b2dd1e552-9\"\n                                 role=\"region\"\n                                 aria-labelledby=\"faq-q-block_c7454b604f5544a48df3d50b2dd1e552-9\">\n                                                            \n                                    \n                \n        <div class=\"editor answer\"\n                                                        >\n        <p>Le\u00a0syst\u00e8me OBD\u00a0utilise plusieurs\u00a0modes de diagnostic\u00a0pour analyser les performances du\u00a0moteur\u00a0et identifier d\u2019\u00e9ventuels dysfonctionnements. Parmi les principaux\u00a0modes OBD, on retrouve :<\/p>\n<ul>\n<li>Mode 1\u00a0: Donn\u00e9es en temps r\u00e9el sur les capteurs du moteur (consommation de\u00a0carburant, temp\u00e9rature, etc.).<\/li>\n<li>Mode 2\u00a0: Informations sur les d\u00e9fauts enregistr\u00e9s et les conditions dans lesquelles ils sont apparus.<\/li>\n<li>Mode 3\u00a0: Lecture des\u00a0codes\u00a0d\u2019erreur du\u00a0syst\u00e8me de contr\u00f4le\u00a0du moteur.<\/li>\n<li>Mode 4\u00a0: R\u00e9initialisation des\u00a0codes\u00a0d\u2019anomalies et arr\u00eat du voyant moteur.<\/li>\n<li>Mode 5 et 6\u00a0: Tests sp\u00e9cifiques aux capteurs et aux syst\u00e8mes d\u2019\u00e9missions.<\/li>\n<li>Mode 9\u00a0: Informations sur le num\u00e9ro VIN du\u00a0v\u00e9hicule\u00a0et son historique de pannes.<\/li>\n<\/ul>\n<p>Ces\u00a0modes OBD\u00a0sont standardis\u00e9s selon les normes\u00a0ISO,\u00a0SAE, et\u00a0CAN, garantissant leur compatibilit\u00e9 avec la plupart des\u00a0lecteurs OBD\u00a0du march\u00e9.<\/p>\n\n        <\/div>\n    \n                            <\/div>\n                        <\/div>\n                                            <div class=\"accordion-item\">\n                            <div class=\"accordion-item_header\">\n                                <h3 class=\"question\">\n                                    <button class=\"question_btn\"\n                                            type=\"button\"\n                                            aria-expanded=\"false\"\n                                            aria-controls=\"faq-ans-block_c7454b604f5544a48df3d50b2dd1e552-10\"\n                                            id=\"faq-q-block_c7454b604f5544a48df3d50b2dd1e552-10\">\n                                        Quel type de lecteur OBD choisir pour un v\u00e9hicule essence ou diesel ?\n                                    <\/button>\n                                <\/h3>\n                                <div class=\"icon\">\n                                    <svg width=\"12\" height=\"18\" viewBox=\"0 0 12 18\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n                                        <line x1=\"5.68164\" y1=\"4.69898e-07\" x2=\"5.68164\" y2=\"15.7739\" stroke=\"white\" stroke-width=\"1.5\"\/>\n                                        <path d=\"M10.5312 10.9805L5.53125 15.9805L0.531259 10.9805\" stroke=\"white\" stroke-width=\"1.5\"\/>\n                                    <\/svg>\n                                <\/div>\n                            <\/div>\n                            <div class=\"accordion-item_content\"\n                                 id=\"faq-ans-block_c7454b604f5544a48df3d50b2dd1e552-10\"\n                                 role=\"region\"\n                                 aria-labelledby=\"faq-q-block_c7454b604f5544a48df3d50b2dd1e552-10\">\n                                                            \n                                    \n                \n        <div class=\"editor answer\"\n                                                        >\n        <p>Le choix d\u2019un\u00a0lecteur OBD\u00a0d\u00e9pend du type de\u00a0v\u00e9hicule\u00a0et du standard de communication utilis\u00e9 :<\/p>\n<ul>\n<li>Pour un\u00a0v\u00e9hicule essence, un\u00a0lecteur OBD-II\u00a0compatible avec les normes\u00a0ISO 9141-2,\u00a0KWP2000, ou\u00a0CAN\u00a0est g\u00e9n\u00e9ralement adapt\u00e9.<\/li>\n<li>Pour un\u00a0v\u00e9hicule diesel, un\u00a0scanner OBD\u00a0prenant en charge les protocoles\u00a0SAE J1850 VPW,\u00a0ISO 15765-4 CAN\u00a0ou\u00a0J1939\u00a0est recommand\u00e9.<\/li>\n<\/ul>\n<p>Certains\u00a0lecteurs OBD\u00a0avanc\u00e9s offrent des\u00a0options\u00a0suppl\u00e9mentaires, comme l\u2019affichage des donn\u00e9es en temps r\u00e9el, la lecture des capteurs de\u00a0carburant\u00a0et des syst\u00e8mes de\u00a0contr\u00f4le des \u00e9missions.<\/p>\n\n        <\/div>\n    \n                            <\/div>\n                        <\/div>\n                                            <div class=\"accordion-item\">\n                            <div class=\"accordion-item_header\">\n                                <h3 class=\"question\">\n                                    <button class=\"question_btn\"\n                                            type=\"button\"\n                                            aria-expanded=\"false\"\n                                            aria-controls=\"faq-ans-block_c7454b604f5544a48df3d50b2dd1e552-11\"\n                                            id=\"faq-q-block_c7454b604f5544a48df3d50b2dd1e552-11\">\n                                        Que signifie un code d\u2019erreur OBD relatif au carburant ?\n                                    <\/button>\n                                <\/h3>\n                                <div class=\"icon\">\n                                    <svg width=\"12\" height=\"18\" viewBox=\"0 0 12 18\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n                                        <line x1=\"5.68164\" y1=\"4.69898e-07\" x2=\"5.68164\" y2=\"15.7739\" stroke=\"white\" stroke-width=\"1.5\"\/>\n                                        <path d=\"M10.5312 10.9805L5.53125 15.9805L0.531259 10.9805\" stroke=\"white\" stroke-width=\"1.5\"\/>\n                                    <\/svg>\n                                <\/div>\n                            <\/div>\n                            <div class=\"accordion-item_content\"\n                                 id=\"faq-ans-block_c7454b604f5544a48df3d50b2dd1e552-11\"\n                                 role=\"region\"\n                                 aria-labelledby=\"faq-q-block_c7454b604f5544a48df3d50b2dd1e552-11\">\n                                                            \n                                    \n                \n        <div class=\"editor answer\"\n                                                        >\n        <p>Un\u00a0code\u00a0OBD li\u00e9 au\u00a0carburant\u00a0peut indiquer un probl\u00e8me avec l\u2019injection, la pression de la pompe ou la qualit\u00e9 du m\u00e9lange air\/carburant. Quelques exemples de\u00a0codes d\u2019erreur OBD\u00a0fr\u00e9quents :<\/p>\n<ul>\n<li>P0171\u00a0: M\u00e9lange air\/carburant\u00a0trop pauvre (souvent caus\u00e9 par un capteur d\u00e9fectueux ou un probl\u00e8me d\u2019injection).<\/li>\n<li>P0172\u00a0: M\u00e9lange trop riche, indiquant une surconsommation de\u00a0carburant.<\/li>\n<li>P0455\u00a0: Fuite d\u00e9tect\u00e9e dans le syst\u00e8me d\u2019\u00e9vaporation des\u00a0\u00e9missions\u00a0(li\u00e9 au bouchon du r\u00e9servoir ou au syst\u00e8me de r\u00e9cup\u00e9ration des vapeurs).<\/li>\n<\/ul>\n\n        <\/div>\n    \n                            <\/div>\n                        <\/div>\n                                    <\/div>\n                    <\/div>\n    <\/div>\n<\/section>","protected":false},"excerpt":{"rendered":"<p>On-Board Diagnostic (OBD) is an essential technology in the modern automotive world.<\/p>\n","protected":false},"author":2,"featured_media":1872,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[29],"tags":[],"class_list":["post-1871","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technology"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>On-Board Diagnostic: Understanding Onboard Diagnostics - Dunasys<\/title>\n<meta name=\"description\" content=\"Discover everything you need to know about On-Board Diagnostic in our guide. 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