VOLVO
ECM-0120 - Throttle unit, potentiometer 1. Faulty
System
Engine Control Module (ECM)
Volvo models this fault code applies to
This fault code has different meanings depending on model, model year or engine. Select the meaning that applies to your car.
Applies to the following models:
3 modelsC30 (2007–2013), S40 (2004–2013), V50 (2004–2013)
What does this fault code mean?
The control module knows a fault exists in potentiometer 1 of the throttle unit but cannot tell which fault it is. This is a collective code, and the cause is found among the other fault codes for the throttle unit.
Possible causes
- A fault that cannot be specified; the cause is shown by the other fault codes for the throttle unit
What you can do
- 1Have a workshop read the fault codes in the engine control module and fix the throttle unit's specific codes first
- 2If you have a diagnostic tool, read the fault codes in the engine control module and deal with the nearest underlying code first
- 3Erase this code last and take the car for a test drive to see whether it returns
Symptoms you may notice1
- No noticeable symptoms for the driver
General guidance for car owners. Diagnosis on the car can point to a different cause.