P0134 means the upstream O2 sensor on Bank 1 isn't switching between rich and lean within a set time after warm-up. The ECU gives up waiting, runs open-loop fuel trim, and lights the CEL.
Scanne ta voiture en 60 secondes environ : vois si P0134 est vraiment présent, à quel point c'est urgent et ce que la réparation devrait coûter.
Telecharger SkanyxP0134 means the upstream O2 sensor on Bank 1 isn't switching between rich and lean within a set time after warm-up. The ECU gives up waiting, runs open-loop fuel trim, and lights the CEL.
P0134 est un code defaut lie a emissions, classe en gravite moderate. Lorsque le calculateur de ton vehicule detecte cette condition, il enregistre P0134 et allume le voyant moteur.
Si ton vehicule a declenche P0134, tu peux remarquer un ou plusieurs de ces symptomes :
Voici les causes les plus courantes de P0134 :
En general oui, pour des trajets courts. You can drive short distances, but expect worse fuel economy and a failed emissions test. Extended driving in open loop dumps extra fuel into the exhaust and can shorten catalytic converter life.
Suis ces etapes pour identifier la cause profonde de P0134 :
Les couts de reparation de P0134 varient selon la cause profonde et ton vehicule. Voici des estimations courantes :
Prix estimes au March 2026. Les couts varient selon la region, le vehicule et le garage.
P0134 se comporte differemment selon ton vehicule. Selectionne ta voiture ci-dessous pour des causes propres au modele, les problemes connus et des estimations de couts ajustees :
1997-2011
2AZ-FE 2.4L and 1MZ-FE 3.0L V6 both see upstream O2 sensor failure around 150,000 to 200,000 km. Toyota TSB EG011-06 covers replacement with the updated Denso part. Aftermarket sensors frequently re-trigger P0134 within a year.
Couts estimes pour les proprietaires de Toyota Camryajuste a la baisse par rapport a la moyenne en raison du prix des pieces specifiques a Toyota
Prix estimes au March 2026. Les couts varient selon la region, le vehicule et le garage.
2001-2015
K20 and R18 engines often log P0134 when the PGM-FI main relay or the O2 heater fuse in the underhood box (typically 15A) blows. Check the fuse before ordering a sensor.
Couts estimes pour les proprietaires de Honda Civicajuste a la baisse par rapport a la moyenne en raison du prix des pieces specifiques a Honda
Prix estimes au March 2026. Les couts varient selon la region, le vehicule et le garage.
2004-2014
MK5 and MK6 with the 2.0 TSI (CCTA, CBFA) and 2.0 FSI (BPY) route the upstream sensor loom close to the turbo heat shield. Melted connectors are a known failure documented in VW TPI 2011552.
Couts estimes pour les proprietaires de Volkswagen Golfajuste a la hausse par rapport a la moyenne en raison du prix des pieces specifiques a Volkswagen
Prix estimes au March 2026. Les couts varient selon la region, le vehicule et le garage.
1999-2013
E46 with M54 and E90 with N52 commonly crack the exhaust manifold at the front runner, cooling the pre-cat sensor and logging P0134. N52 owners often see it paired with P0491/P0492 (secondary air).
Couts estimes pour les proprietaires de BMW 3 Seriesajuste a la hausse par rapport a la moyenne en raison du prix des pieces specifiques a BMW
Prix estimes au March 2026. Les couts varient selon la region, le vehicule et le garage.
2004-2014
5.4L 3V Triton is notorious for broken exhaust manifold studs (Ford TSB 08-7-6) that let exhaust leak past the upstream sensor. Replacing the sensor without fixing the leak just repeats the code.
Couts estimes pour les proprietaires de Ford F-150ajuste a la hausse par rapport a la moyenne en raison du prix des pieces specifiques a Ford
Prix estimes au March 2026. Les couts varient selon la region, le vehicule et le garage.
Ces codes apparaissent souvent avec P0134 ou indiquent des problemes connexes :
On a high-mileage car past 150,000 km with the original sensor, that's usually the right bet. On a newer car or after any wiring work, test first. A €120 sensor doesn't fix a €3 fuse or a cracked manifold.
It's the upstream (pre-cat) sensor on the side of the engine that contains cylinder 1. On inline-4s and inline-6s there's only one bank so it's just the sensor before the cat. On V6 and V8 engines, check the service manual - Ford and GM often swap which side is Bank 1.
Not immediately. But running open-loop for months means the mixture isn't being trimmed, and any rich condition dumps raw fuel into the cat. Fix it within a few hundred km of driving, not thousands.
They work electrically, but the crimped splices are a common failure point and the tip calibration isn't always matched to your ECU's expected switch time. For €20 to €40 more, buy a direct-fit Denso, Bosch or NTK with the correct plug.
Three usual suspects: a cheap aftermarket sensor with slow response, an exhaust leak upstream keeping the tip too cool to switch, or a wiring problem (chafed heater wire, bad ground) you didn't catch the first time.
A flashing check engine light is not the same as a steady one. It almost always means an active misfire that can wreck your catalytic converter in minutes.
An unfamiliar light just appeared on your dashboard and you have no idea what it means. Here is how to read every symbol by colour and which ones mean stop now.
Ta voiture a enregistré P0134. Skanyx le lit avec n'importe quel adaptateur OBD2 Bluetooth standard, te dit si tu peux continuer à rouler en sécurité et affiche la fourchette de réparation de €1-€750 pour que tu connaisses le montant avant qu'un garage ne te fasse un devis.
Telecharger Skanyx