VOLVO
ECM-231C - Rear heated oxygen sensor (HO2S) aging, bank 2. Signal too high
System
Motorsteuergerät (ECM)
Volvo-Modelle, für die dieser Fehlercode gilt
Gilt für folgende Modelle:
2 ModelleS80 (1999–2006), XC90 (2003–)
Modelle nach Baujahr und Motor anzeigen (2)
Was bedeutet der Fehlercode?
Although the code is named for a high signal, it concerns the sensor not showing a rich mixture. The engine control module (ECM) changes the fuel-air mixture when the rear sensor on bank 2 does not show a rich mixture, and the code is set if the sensor still does not respond. The usual causes are a leak in the exhaust system or a worn-out sensor.
Mögliche Ursachen
- Leak in the exhaust system
- Damaged rear oxygen sensor
Was Sie tun können
- 1Read the code, clear it and road test to see whether it comes back
- 2Check the exhaust system for leaks, especially at joints and clamps
- 3Do not use rust solvent spray or grease on the sensor connector
- 4Check that the connector to the rear sensor on bank 2 is secure and clean
- 5If no fault is found, have a workshop decide whether a new rear oxygen sensor is needed, since a damaged sensor can cause this fault
Symptome, die Sie bemerken können1
- Malfunction indicator lamp (MIL) lit
Allgemeine Hinweise für Fahrzeughalter. Die Diagnose am Fahrzeug kann eine andere Ursache zeigen.