VOLVO
ECM-1122 - Air temperature sensor inlet. Signal too low. Intermittent fault
System
Motorsteuergerät (ECM)
Volvo-Modelle, für die dieser Fehlercode gilt
Gilt für folgende Modelle:
2 ModelleS40 (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 signal wire from the intake air temperature sensor. Engine management then uses a fixed value instead of the actual air temperature. The fault is intermittent, so it may only appear now and then.
Mögliche Ursachen
- Signal wire short-circuited to supply voltage
- Open circuit in the signal wire
- Defective intake air 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 intake air 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 air temperature rises when the engine warms up and matches the surroundings after a long rest
- 5If the fault remains, have a workshop 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 air temperature
Allgemeine Hinweise für Fahrzeughalter. Die Diagnose am Fahrzeug kann eine andere Ursache zeigen.