Was bedeutet der Fehlercode ECM-042B?

Diagnose und Fehlercodedefinition für ECM-042B (Volvo C30 (2007–2013), Volvo C30 (2007–2013), Volvo C70 (2006–2013)). Steuergerätereparatur bei OBD Tuning.

VOLVO

ECM-042B - Rear temperature sensor, catalytic converter. Faulty signal

System

Motorsteuergerät (ECM)

Volvo-Modelle, für die dieser Fehlercode gilt

Gilt für folgende Modelle:

4 Modelle

C30 (2007–2013), C70 (2006–2013), S40 (2004–2013), V50 (2004–2013)

Modelle nach Baujahr und Motor anzeigen (10)

Was bedeutet der Fehlercode?

The engine control module (ECM) continuously compares the signal from the rear temperature sensor in the catalytic converter with a calculated value. If they do not match, the fault is set, and it is diagnosed when the ignition is switched on. The causes are poor contact in the connections, an open or shorted wiring fault, or a damaged temperature sensor.

Mögliche Ursachen

Poor contact, contact resistance or oxidation at the sensor terminals
Open circuit or short circuit in the wiring to the temperature sensor
Damaged temperature sensor

Was Sie tun können

1Switch off the ignition and check the connector to the rear temperature sensor for looseness, contact resistance and oxidation
2Use a multimeter to check that the signal wire from the rear sensor has no open circuit and is not shorted to ground or voltage
3Also use a multimeter to check that the voltage wire to the sensor has no open circuit and is not shorted to ground or voltage
4If you have a diagnostic tool, read the rear sensor temperature in live data while the engine warms up and check that it rises evenly
5If the fault remains, have a workshop with diagnostic equipment check the rear temperature sensor and replace it if needed

Symptome, die Sie bemerken können1

The check engine lamp lights or behaves abnormally

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