Was bedeutet der Fehlercode ECM-1121?

Diagnose und Fehlercodedefinition für ECM-1121 (Volvo S40 (1996–2004), Volvo V40 (1996–2004)). Steuergerätereparatur bei OBD Tuning.

VOLVO

ECM-1121 - Engine temperature sensor. Signal faulty. Intermittent fault

System

Motorsteuergerät (ECM)

Volvo-Modelle, für die dieser Fehlercode gilt

Gilt für folgende Modelle:

2 Modelle

S40 (1996–2004), V40 (1996–2004)

Modelle nach Baujahr und Motor anzeigen (2)

Was bedeutet der Fehlercode?

The engine control module has intermittently found a fault on the cable running from the engine temperature sensor, or that the sensor value has not changed after start-up. Engine management then uses a fixed value instead of the actual engine temperature. The fault is intermittent, so it may have cleared by the time the car reaches a workshop.

Mögliche Ursachen

Signal wire short-circuited to supply voltage
Open circuit in the signal wire
Defective engine temperature sensor
Signal wire short-circuited to ground

Was Sie tun können

1Read and note the code, clear it and road test to see whether it returns
2Check the engine temperature sensor connector for play, contact resistance and oxidation
3Use a multimeter to check that the signal wire is not broken and has no contact with ground or voltage
4With your own diagnostic tool, check that the engine temperature rises as the engine warms up
5If the fault remains, have a workshop with diagnostic equipment check the sensor and the wiring

Symptome, die Sie bemerken können1

The malfunction indicator lamp comes on

Was der Fehler beeinflussen kann1

The engine control module uses a fixed value for the engine temperature

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