VOLVO
ECM-2176 - Throttle unit motor. 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 monitors the movements and end positions of the throttle disc in the throttle unit, and stores the code when the adaptation of the disc positions is wrong. The fault can come from mechanical damage to the throttle disc, from the connector to the throttle unit or from the unit itself.
Possible causes
- Mechanical damage to the throttle disc
- Damaged connector to the throttle unit
- Damaged throttle unit
What you can do
- 1Clear the code and road test the car to see whether it returns
- 2Inspect the throttle disc for damage and check that it does not stick
- 3Check the connectors at the throttle unit for play, contact resistance and oxidation
- 4Have a diagnostic tool? If it supports activation, run the throttle motor and check that the disc moves between its end positions
- 5If the above does not remedy the fault, have a workshop replace the throttle unit
Symptoms you may notice1
- The malfunction indicator lamp (MIL) comes on
General guidance for car owners. Diagnosis on the car can point to a different cause.