VOLVO
ECM-2108 - Electronic throttle unit. Internal fault
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
3 modelsC30 (2007–2013), S40 (2004–2013), V50 (2004–2013)
What does this fault code mean?
The engine control module (ECM) monitors the throttle unit and has registered faulty signals from it. The fault can come from a damaged throttle unit or, less often, from a damaged engine control module.
Possible causes
- Damaged throttle unit
- Damaged engine control module (ECM)
What you can do
- 1Read and clear the fault code and check whether it returns
- 2Check that the connector at the throttle unit is firmly seated, clean and free from play
- 3If you have a diagnostic tool, read the throttle position in live data with the ignition on and check that it changes smoothly as the pedal is pressed
- 4Have a workshop replace the throttle unit if it is damaged
- 5If the fault remains after the throttle unit is replaced, have a workshop check the engine control module
Symptoms you may notice1
- The malfunction indicator lamp (MIL) is lit
General guidance for car owners. Diagnosis on the car can point to a different cause.