{"id":451275,"date":"2026-03-23T09:43:37","date_gmt":"2026-03-23T13:43:37","guid":{"rendered":"https:\/\/autosphere.ca\/?p=451275"},"modified":"2026-03-23T09:43:37","modified_gmt":"2026-03-23T13:43:37","slug":"lelectronique-est-elle-preferable-a-la-mecanique-en-pieces-automobiles","status":"publish","type":"post","link":"https:\/\/autosphere.ca\/fr\/mecanique\/2026\/03\/23\/lelectronique-est-elle-preferable-a-la-mecanique-en-pieces-automobiles\/","title":{"rendered":"L\u2019\u00e9lectronique est-elle pr\u00e9f\u00e9rable \u00e0 la m\u00e9canique en pi\u00e8ces automobiles ?"},"content":{"rendered":"

Les voitures d’aujourd’hui comptent sur des technologies diff\u00e9rentes de celles d’autrefois, notamment en mati\u00e8re de performance de consommation de carburant.<\/strong><\/p>\n

Sans reculer tr\u00e8s loin dans le temps (moins de 10 ans), ces technologies servent \u00e0 am\u00e9liorer le rendement et l’\u00e9conomie d’essence sur certains v\u00e9hicules. Malheureusement, il arrive que ces avancements m\u00e9caniques n\u2019obtiennent pas les r\u00e9sultats attendus et finissent par \u00eatre remplac\u00e9s par des m\u00e9thodes d’autrefois.<\/p>\n

J’ai r\u00e9cemment \u00e9t\u00e9 t\u00e9moin de cette tentative d’am\u00e9lioration technologique qui n\u2019a donn\u00e9 que du fil \u00e0 retordre au propri\u00e9taire de ces voitures. Je ne veux pas nommer les deux constructeurs qui l\u2019utilisent, mais pour ceux et celles qui ont \u00e9t\u00e9 t\u00e9moins de cette composante qui, \u00e0 mon avis, n’aurait jamais d\u00fb voir le jour, il sera facile d\u2019approuver que le thermostat variable soit un \u00e9chec dans notre industrie.<\/p>\n

Gestion de temp\u00e9rature<\/strong><\/p>\n

Les probl\u00e8mes de thermostat (ou valve de contr\u00f4le du liquide de refroidissement \u2014 CCV) sur certains mod\u00e8les de 2018 \u00e0 2025 sont fr\u00e9quents, souvent bloqu\u00e9s en position ouverte, provoquant une chaleur faible, une lente mont\u00e9e en temp\u00e9rature et le code erreur P0126 (temp\u00e9rature trop basse), P0128 (temp\u00e9rature trop longue \u00e0 atteindre) ou P0125 (insuffisance de la temp\u00e9rature du liquide de refroidissement pour le bouclage du carburant), ce qui entra\u00eene une mauvaise gestion du carburant, une surconsommation et un ralenti instable.<\/p>\n

Le principal constructeur concern\u00e9 propose une extension de garantie (SSPD8) couvrant ce d\u00e9faut jusqu’\u00e0 15 ans ou 240 000 km. Imaginez l’hiver \u00e0 avec aucune chaleur m\u00eame apr\u00e8s plusieurs heures de route. Je n’aimerais pas \u00eatre pris dans cette situation avec notre climat hivernal.<\/p>\n

De plus, l’\u00e9t\u00e9, le moteur doit atteindre la bonne temp\u00e9rature de fonctionnement pour \u00eatre moins polluant et bien performer. La diff\u00e9rence entre les deux thermostats en soi est m\u00e9canique et \u00e9lectronique. Le bon vieux thermostat m\u00e9canique a, depuis plus de cent ans, prouv\u00e9 que son fonctionnement est tr\u00e8s efficace. Il a \u00e9t\u00e9 install\u00e9 dans les voitures de fa\u00e7on g\u00e9n\u00e9rale dans les ann\u00e9es 1920.<\/p>\n

Quant au thermostat \u00e9lectronique, il a \u00e9t\u00e9 retir\u00e9 dans les nouveaux mod\u00e8les de ces constructeurs puisqu’il causait trop de probl\u00e8mes.<\/p>\n

Parfois, il est n\u00e9cessaire d’aller faire un essai routier avec le v\u00e9hicule en question puisque le probl\u00e8me ne sera pas pr\u00e9sent avec le moteur qui tourne en position de stationnement. En roulant, l’air qui arrive dans le radiateur avec un thermostat ouvert est automatiquement refroidi, donc aucune chaleur pr\u00e9sente.<\/p>\n

Prenez le temps de bien faire vos v\u00e9rifications avec l’\u00e9quipement appropri\u00e9. Bon diagnostic \u00e0 tous !<\/p>\n","protected":false},"excerpt":{"rendered":"

Les voitures d’aujourd’hui comptent sur des technologies diff\u00e9rentes de celles d’autrefois, notamment en mati\u00e8re de performance de consommation de carburant. Sans reculer tr\u00e8s loin dans le temps (moins de 10 ans), ces technologies servent \u00e0 am\u00e9liorer le rendement et l’\u00e9conomie d’essence sur certains v\u00e9hicules. Malheureusement, il arrive que ces avancements m\u00e9caniques n\u2019obtiennent pas les r\u00e9sultats…<\/p>\n","protected":false},"author":47,"featured_media":451274,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[820,5126,632,5125,5568],"tags":[7775,837,7978],"class_list":["post-451275","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mecanique-editorial","category-entretien-diagnostic","category-mecanique","category-pieces-composantes","category-probleme-voiture","tag-diagnostic-fr","tag-entretien-et-reparation-fr","tag-reparation-automobile"],"acf":[],"yoast_head":"\nL\u2019\u00e9lectronique est-elle pr\u00e9f\u00e9rable \u00e0 la m\u00e9canique en pi\u00e8ces automobiles ? - Autosphere<\/title>\n<meta name=\"description\" content=\"Les voitures d'aujourd'hui comptent sur des technologies diff\u00e9rentes de celles d'autrefois, 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