VOLVO
ECM-1802 - Intake air temperature (IAT) sensor. Signal too low
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 ECM monitors the signal wire from the intake air temperature sensor. If the fault shows the signal is too low, the control module uses a fixed value for the air temperature instead.
Mögliche Ursachen
- Signal wire short-circuited to ground
- Defective intake air temperature sensor
Was Sie tun können
- 1Switch off the ignition and check the connector on the mass air flow sensor, which has the intake air temperature sensor built in, for play and oxidation
- 2With a multimeter, check that the signal wire from the sensor is not shorted to ground
- 3If you have a diagnostic tool: read the air temperature in live data and check that it matches the surrounding air
- 4If the fault remains, have a workshop check or replace the mass air flow sensor, since the temperature sensor is built into it
Symptome, die Sie bemerken können1
- No noticeable symptoms for the driver
Was der Fehler beeinflussen kann1
- The control module uses a fixed value for the air temperature
Allgemeine Hinweise für Fahrzeughalter. Die Diagnose am Fahrzeug kann eine andere Ursache zeigen.