Was bedeutet der Fehlercode ECM-2B20?

Diagnose und Fehlercodedefinition für ECM-2B20 (Volvo S80 (1999–2006)). Steuergerätereparatur bei OBD Tuning.

VOLVO

ECM-2B20 - Heated oxygen sensor (HO2S) bank 2, preheating. Signal missing

System

Motorsteuergerät (ECM)

Volvo-Modelle, für die dieser Fehlercode gilt

Gilt für folgende Modelle:

1 Modell

S80 (1999–2006)

Modelle nach Baujahr und Motor anzeigen (1)

Volvo S80 (1999–2006)2002–2004Nur Motor: B6294S2, B6294T

Was bedeutet der Fehlercode?

The fault code shows that the preheating of the oxygen sensor on bank 2 gives no signal. The module measures the signal both when preheating is switched on and when it is off, and a signal that is too low while preheating is off sets the code.

Mögliche Ursachen

Signal wire short-circuited to ground
Contact resistance and oxidation
Power feed from the system relay is interrupted

Was Sie tun können

1Check that the connector at the bank 2 oxygen sensor is secure and free from contact resistance and oxidation
2Make sure every connector in the circuit is fully seated in its position
3Start the engine and let it idle. With a diagnostic tool you can read the status of the bank 2 sensor fault
4Use a multimeter to check that the supply wire to the sensor has no open circuit and that the signal wire is not short-circuited to ground (the body)
5If the fault remains, have a workshop check the wiring and the sensor

Symptome, die Sie bemerken können1

The malfunction indicator lamp (MIL) comes on

Was der Fehler beeinflussen kann1

Fuel trim control is switched off

Allgemeine Hinweise für Fahrzeughalter. Die Diagnose am Fahrzeug kann eine andere Ursache zeigen.