P0151O2 Sensor Circuit Low Voltage (Bank 2 Sensor 1)
Voici ce que signifie le code défaut P0151, pourquoi il apparaît et que faire à son sujet.
Système: Fuel & air metering (O2 sensor)
Généralement sans danger sur de courtes distances, mais faites-le contrôler rapidement.
Ce que signifie P0151
The engine computer saw the voltage from the upstream oxygen sensor on bank 2 (the cylinder bank that does NOT contain cylinder #1) stay too low. This sensor measures oxygen in the exhaust so the computer can balance the fuel mixture. A low reading usually means the sensor reports a constantly lean (too much air) condition or has lost its signal.
Symptômes courants
- Check engine light on
- Reduced fuel economy
- Rough or uneven running in some cases
- Possible hesitation or slight loss of power
Causes courantes
Classées de la plus courante à la moins courante.
- 1Failed or aged upstream O2 sensor on bank 2
- 2Wiring or connector fault (open/short to ground) in the sensor circuit
- 3Exhaust leak near the sensor letting in outside air
- 4Actual lean running condition (vacuum leak, low fuel pressure)
- 5Corroded or loose sensor connector
- 6ECM/PCM fault (rare)
Que faire
It is usually fine to drive short distances, but get it diagnosed soon because a long-running wrong fuel mixture can foul the catalytic converter and waste fuel. A technician will check the sensor wiring and signal before replacing the sensor, since a wiring fault or vacuum leak can mimic a bad sensor.
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Questions fréquentes
Que signifie le code P0151 ?
The engine computer saw the voltage from the upstream oxygen sensor on bank 2 (the cylinder bank that does NOT contain cylinder #1) stay too low. This sensor measures oxygen in the exhaust so the computer can balance the fuel mixture. A low reading usually means the sensor reports a constantly lean (too much air) condition or has lost its signal.
Quelles sont les causes du code P0151 ?
Les causes les plus courantes sont : Failed or aged upstream O2 sensor on bank 2, Wiring or connector fault (open/short to ground) in the sensor circuit, Exhaust leak near the sensor letting in outside air, Actual lean running condition (vacuum leak, low fuel pressure), Corroded or loose sensor connector, ECM/PCM fault (rare).
Peut-on rouler sans danger avec le code P0151 ?
Généralement sans danger sur de courtes distances, mais faites-le contrôler rapidement.
Comment corriger le code P0151 ?
It is usually fine to drive short distances, but get it diagnosed soon because a long-running wrong fuel mixture can foul the catalytic converter and waste fuel. A technician will check the sensor wiring and signal before replacing the sensor, since a wiring fault or vacuum leak can mimic a bad sensor.
Ce sont des informations générales pour vous aider à comprendre le code P0151, et non un substitut au diagnostic d’un mécanicien qualifié. Confirmez toujours la cause avant de remplacer des pièces.
Les définitions des codes suivent la liste OBD-II normalisée (SAE J2012). CarVinVin est indépendant et n’est affilié à aucun constructeur.