VOLVO
ECM-254C - Front heated oxygen sensor (HO2S), bank 2, heating. 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?
The engine control module (ECM) heats the front oxygen sensor on bank 2 by pulsing the current to its heating element. While the heating is active, the sensor signal should stay below a certain value. If the signal is above that value, the code is set.
Mögliche Ursachen
- Signal wire short-circuited to supply voltage
- Damaged front oxygen sensor on bank 2
Was Sie tun können
- 1Read the code, clear it and road test the car to see whether it returns
- 2Check that the lambda sensor connector is clean and fully engaged. Do not use rust solvent spray or grease on it
- 3Use a multimeter to check that the signal wire has no voltage to ground when the control module is disconnected
- 4Look for chafing and places where the signal wire may have been pinched or worn against a sharp edge
- 5If the wire is intact the sensor may be damaged; have a workshop check it or replace it
Symptome, die Sie bemerken können1
- Malfunction indicator lamp (MIL) on
Was der Fehler beeinflussen kann1
- Oxygen sensor control is switched off
Allgemeine Hinweise für Fahrzeughalter. Die Diagnose am Fahrzeug kann eine andere Ursache zeigen.