VOLVO
ECM-253B - Front heated oxygen sensor (HO2S), bank 2. Signal missing
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 titled signal missing, it applies when the voltage used to heat the oxygen sensor on bank 2 disturbs the sensor's signal. The engine control module (ECM) stores the code when this happens.
Mögliche Ursachen
- One of the heater cables is short-circuited to the sensor's other signal cables
- Damaged front heated oxygen sensor
Was Sie tun können
- 1Read and note the code, clear it and road test to see whether it returns
- 2Check the bank 2 oxygen sensor connector for a firm fit and cleanliness. Rust solvent spray and grease must not be used
- 3Follow the cables from the sensor and look for chafing, damaged insulation and places where two cables may have touched
- 4Use a multimeter to check that the heater cables are not short-circuited to the sensor's signal cables
- 5If the cables are intact, have a workshop decide whether the oxygen sensor needs replacing
Symptome, die Sie bemerken können1
- The malfunction indicator lamp (MIL) is lit
Was der Fehler beeinflussen kann2
- Oxygen sensor control is switched off
- Catalytic converter diagnostics are switched off
Allgemeine Hinweise für Fahrzeughalter. Die Diagnose am Fahrzeug kann eine andere Ursache zeigen.