{"id":17802,"date":"2025-04-15T06:41:55","date_gmt":"2025-04-15T06:41:55","guid":{"rendered":"https:\/\/www.motointegrator.fr\/blog\/?p=17802"},"modified":"2025-06-12T20:14:02","modified_gmt":"2025-06-12T20:14:02","slug":"codes-defauts-obd-que-signifient-ils","status":"publish","type":"post","link":"https:\/\/www.motointegrator.fr\/blog\/codes-defauts-obd-que-signifient-ils\/","title":{"rendered":"Codes d\u00e9fauts OBD : que signifient-ils ?"},"content":{"rendered":"<p>Bien que la premi\u00e8re liste de codes d\u00e9fauts OBD ait vu le jour d\u00e8s 1965 et qu\u2019elle soit aujourd\u2019hui devenue une norme internationale, peu d\u2019automobilistes en connaissent r\u00e9ellement l\u2019existence, encore moins son r\u00f4le ou son fonctionnement. Pourtant, cette liste est un outil essentiel pour d\u00e9tecter les irr\u00e9gularit\u00e9s et les dysfonctionnements au sein des diff\u00e9rents syst\u00e8mes du v\u00e9hicule &#8211; moteur, syst\u00e8me d\u2019\u00e9chappement, freins, etc.<\/p><div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">L\u00e9gende<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.motointegrator.fr\/blog\/codes-defauts-obd-que-signifient-ils\/#OBD_un_outil_de_diagnostic_incontournable_depuis_1965\" >OBD : un outil de diagnostic incontournable depuis 1965<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.motointegrator.fr\/blog\/codes-defauts-obd-que-signifient-ils\/#Comment_fonctionne_le_systeme_de_codes_defauts_automobile\" >Comment fonctionne le syst\u00e8me\u00a0de codes d\u00e9fauts automobile ?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.motointegrator.fr\/blog\/codes-defauts-obd-que-signifient-ils\/#Comment_lire_un_code_OBD\" >Comment lire un code OBD ?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.motointegrator.fr\/blog\/codes-defauts-obd-que-signifient-ils\/#Pourquoi_il_ne_faut_jamais_ignorer_un_code_defaut_OBD\" >Pourquoi il ne faut jamais ignorer un code d\u00e9faut OBD<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.motointegrator.fr\/blog\/codes-defauts-obd-que-signifient-ils\/#Foire_aux_questions_liste_des_codes_defauts_OBD\" >Foire aux questions : liste des codes d\u00e9fauts OBD<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.motointegrator.fr\/blog\/codes-defauts-obd-que-signifient-ils\/#A_quoi_servent_les_codes_OBD\" >\u00c0 quoi servent les codes OBD ?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.motointegrator.fr\/blog\/codes-defauts-obd-que-signifient-ils\/#Que_signifie_un_code_commencant_par_P\" >Que signifie un code commen\u00e7ant par P ?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.motointegrator.fr\/blog\/codes-defauts-obd-que-signifient-ils\/#Quest-ce_que_le_DTC_chez_Opel\" >Qu\u2019est-ce que le DTC chez Opel ?<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n\n<p>Dans cet article, les sp\u00e9cialistes de Motointegrator vous expliquent tout ce qu\u2019il faut savoir sur les codes OBD2, leur utilit\u00e9, leur signification et la fa\u00e7on de les interpr\u00e9ter \u00e0 l\u2019aide de la c\u00e9l\u00e8bre table de codes OBD.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"OBD_un_outil_de_diagnostic_incontournable_depuis_1965\"><\/span>OBD : un outil de diagnostic incontournable depuis 1965<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>L\u2019acronyme <strong>OBD<\/strong> signifie \u00ab\u202f<strong>On-Board Diagnostics<\/strong>\u202f\u00bb, ou diagnostic embarqu\u00e9. On parle \u00e9galement de <strong>DTC<\/strong> (\u00ab\u202fDiagnostic Trouble Code\u202f\u00bb) ou encore de <strong>tableau de codes d\u00e9fauts Delphi<\/strong>. Cette liste regroupe plus de 230 codes, compos\u00e9s chacun d\u2019une s\u00e9rie de lettres et de chiffres.<\/p>\n<p>Volkswagen est \u00e0 l\u2019origine de la premi\u00e8re table de codes OBD, lanc\u00e9e en 1965. \u00c0 l\u2019\u00e9poque, certains mod\u00e8les \u00e9taient d\u00e9j\u00e0 \u00e9quip\u00e9s de prises de diagnostic permettant, \u00e0 l\u2019aide de cartes perfor\u00e9es et de tableaux de correspondance, d\u2019identifier les dysfonctionnements.<\/p>\n<p>Depuis le d\u00e9but des ann\u00e9es 2000, la liste OBD2 est obligatoire pour tous les v\u00e9hicules fabriqu\u00e9s en Europe. La principale diff\u00e9rence avec la version pr\u00e9c\u00e9dente ? Les codes OBD2 sont standardis\u00e9s, ce qui facilite grandement leur lecture et leur interpr\u00e9tation. En Europe, ils sont regroup\u00e9s dans la tableau <strong>EOBD<\/strong> (European On-Board Diagnostics). Ce terme, bien qu\u2019officieux, est largement utilis\u00e9 par les constructeurs europ\u00e9ens.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Comment_fonctionne_le_systeme_de_codes_defauts_automobile\"><\/span>Comment fonctionne le syst\u00e8me\u00a0de codes d\u00e9fauts automobile ?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>D\u00e8s qu\u2019un probl\u00e8me est d\u00e9tect\u00e9 par l\u2019ordinateur de bord, un t\u00e9moin d\u2019alerte s\u2019allume sur le tableau de bord (par exemple, l\u2019ic\u00f4ne \u00ab\u202fCheck Engine\u202f\u00bb). Dans ce cas, il est recommand\u00e9 de se rendre rapidement dans un atelier sp\u00e9cialis\u00e9. L\u00e0, le syst\u00e8me de bord est connect\u00e9 \u00e0 un outil de diagnostic permettant de lire les codes d\u2019erreur.<\/p>\n<p>Chaque dysfonctionnement g\u00e9n\u00e8re un code pr\u00e9cis, r\u00e9pertori\u00e9 dans la liste des codes OBD2. Que le probl\u00e8me concerne le moteur, la carrosserie, les freins, la bo\u00eete de vitesses ou l\u2019\u00e9chappement, l\u2019OBD est capable d\u2019effectuer un diagnostic complet de presque toutes les pi\u00e8ces du v\u00e9hicule.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Comment_lire_un_code_OBD\"><\/span>Comment lire un code OBD ?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Les codes OBD2 se composent de <strong>4 cat\u00e9gories principales<\/strong>, identifi\u00e9es par une lettre :<\/p>\n<ul>\n<li><strong>P<\/strong> = Powertrain (cha\u00eene cin\u00e9matique)<\/li>\n<li><strong>U<\/strong> = Network (r\u00e9seau de communication)<\/li>\n<li><strong>B<\/strong> = Body (carrosserie)<\/li>\n<li><strong>C<\/strong> = Chassis (ch\u00e2ssis)<\/li>\n<\/ul>\n<p>Ces <b>quatre lettres constituent le d\u00e9but<\/b> de chaque code d&rsquo;erreur dans le tableau OBD2. Ensuite, <strong>le premier chiffre<\/strong> indique :<\/p>\n<ul>\n<li><strong>0<\/strong> : code g\u00e9n\u00e9rique (li\u00e9 \u00e0 l\u2019usure ou \u00e0 un probl\u00e8me standard)<\/li>\n<li><strong>1<\/strong> : code sp\u00e9cifique au constructeur<\/li>\n<\/ul>\n<p>Les <strong>trois derniers chiffres<\/strong> pr\u00e9cisent la nature exacte du probl\u00e8me.<\/p>\n<p><strong>Exemple : <\/strong>le code P0420 d\u00e9signe un dysfonctionnement du <strong>catalyseur<\/strong>. Il signale une anomalie sans en donner la cause exacte. Il est donc n\u00e9cessaire de proc\u00e9der \u00e0 un diagnostic approfondi en atelier.<\/p>\n<p><strong>Important :<\/strong> l\u2019interpr\u00e9tation des codes OBD doit \u00eatre confi\u00e9e \u00e0 un professionnel qualifi\u00e9, \u00e9quip\u00e9 d\u2019un appareil ou d\u2019une application de diagnostic adapt\u00e9e.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Pourquoi_il_ne_faut_jamais_ignorer_un_code_defaut_OBD\"><\/span>Pourquoi il ne faut jamais ignorer un code d\u00e9faut OBD<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Un t\u00e9moin d\u2019alerte accompagn\u00e9 d\u2019un <strong>code d\u00e9faut OBD2<\/strong> est un <strong>signal clair<\/strong> qu\u2019une v\u00e9rification s\u2019impose. Ignorer ces alertes pourrait aggraver le probl\u00e8me. Si une pi\u00e8ce doit \u00eatre remplac\u00e9e, jetez un \u0153il \u00e0 notre boutique en ligne : <strong>Motointegrator<\/strong> propose un vaste choix de <a href=\"https:\/\/www.motointegrator.fr\/s\/lp-pieces-de-rechange\/\">pi\u00e8ces d\u00e9tach\u00e9es<\/a> \u00e0 des <strong>prix imbattables<\/strong>.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Foire_aux_questions_liste_des_codes_defauts_OBD\"><\/span>Foire aux questions : liste des codes d\u00e9fauts OBD<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"A_quoi_servent_les_codes_OBD\"><\/span>\u00c0 quoi servent les codes OBD ?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Ils indiquent un dysfonctionnement pr\u00e9cis dans l\u2019un des syst\u00e8mes du v\u00e9hicule.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Que_signifie_un_code_commencant_par_P\"><\/span>Que signifie un code commen\u00e7ant par P ?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Il signale un probl\u00e8me li\u00e9 \u00e0 la cha\u00eene cin\u00e9matique (moteur, bo\u00eete de vitesses, etc.).<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Quest-ce_que_le_DTC_chez_Opel\"><\/span>Qu\u2019est-ce que le DTC chez Opel ?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>DTC signifie \u00ab\u202fDiagnostic Trouble Code\u202f\u00bb &#8211; c\u2019est simplement une autre fa\u00e7on de d\u00e9signer un code d\u00e9faut OBD.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Bien que la premi\u00e8re liste de codes d\u00e9fauts OBD ait vu le jour d\u00e8s 1965 et qu\u2019elle soit aujourd\u2019hui devenue une norme internationale, peu d\u2019automobilistes en connaissent r\u00e9ellement l\u2019existence, encore moins son r\u00f4le ou son fonctionnement. Pourtant, cette liste est un outil essentiel pour d\u00e9tecter les irr\u00e9gularit\u00e9s et les dysfonctionnements au sein des diff\u00e9rents syst\u00e8mes [&hellip;]<\/p>\n","protected":false},"author":27,"featured_media":17815,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[641,2155],"tags":[7263,7264,7266,7265,7267],"class_list":{"0":"post-17802","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-carrousel","8":"category-conseils","9":"tag-codes-defauts-obd2","10":"tag-diagnostic-auto-obd","11":"tag-interpretation-codes-obd","12":"tag-liste-codes-erreur-voiture","13":"tag-outil-diagnostic-automobile"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Codes d\u00e9fauts OBD : que signifient-ils ?<\/title>\n<meta name=\"description\" content=\"D\u00e9couvrez la signification des codes d\u00e9fauts OBD pour votre voiture. 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