P0137O2 Sensor Circuit Low Voltage (Bank 1, Sensor 2)
Voici ce que signifie le code défaut P0137, pourquoi il apparaît et que faire à son sujet.
Système: Catalyst / emissions
Généralement sans danger sur de courtes distances, mais faites-le contrôler rapidement.
Ce que signifie P0137
The downstream oxygen sensor on bank 1 (after the catalytic converter) is reporting a steady low voltage, read as too much oxygen in the exhaust or a circuit problem. Because this rear sensor mostly checks the catalytic converter, the fault usually does not change how the car drives. The cause is often the sensor, its wiring, or an exhaust leak.
Symptômes courants
- Check engine light on
- Typically no noticeable driving change
- Possible failed emissions test
- Catalyst monitor may not complete
- Rarely minor fuel economy change
Causes courantes
Classées de la plus courante à la moins courante.
- 1Failed downstream oxygen sensor
- 2Exhaust leak before or near the rear sensor
- 3Open or short to ground in the signal wire
- 4Corroded or loose sensor connector
- 5Wiring damage from heat or chafing
- 6Engine control module fault (rare)
Que faire
It is usually safe to drive short distances. Have the rear O2 sensor wiring and exhaust checked for leaks; replacing the downstream sensor often clears it. Repair exhaust leaks first since they commonly cause a low reading.
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Questions fréquentes
Que signifie le code P0137 ?
The downstream oxygen sensor on bank 1 (after the catalytic converter) is reporting a steady low voltage, read as too much oxygen in the exhaust or a circuit problem. Because this rear sensor mostly checks the catalytic converter, the fault usually does not change how the car drives. The cause is often the sensor, its wiring, or an exhaust leak.
Quelles sont les causes du code P0137 ?
Les causes les plus courantes sont : Failed downstream oxygen sensor, Exhaust leak before or near the rear sensor, Open or short to ground in the signal wire, Corroded or loose sensor connector, Wiring damage from heat or chafing, Engine control module fault (rare).
Peut-on rouler sans danger avec le code P0137 ?
Généralement sans danger sur de courtes distances, mais faites-le contrôler rapidement.
Comment corriger le code P0137 ?
It is usually safe to drive short distances. Have the rear O2 sensor wiring and exhaust checked for leaks; replacing the downstream sensor often clears it. Repair exhaust leaks first since they commonly cause a low reading.
Ce sont des informations générales pour vous aider à comprendre le code P0137, 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.