VOLVO
ECM-2112 - 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)
Show models by year and engine (13)
- Volvo C30 (2007–2013)2007–2009Engine B4184S11, B4184S8, B4204S3 only
- Volvo C30 (2007–2013)2010Engine B4184S11, B4184S8, B4204S3, B4204S4 only
- Volvo C30 (2007–2013)2011–2013Engine B4204S3, B4204S4 only
- Volvo S40 (2004–2013)2005Engine B4184S11 only
- Volvo S40 (2004–2013)2006Engine B4184S11, B4184S8 only
- Volvo S40 (2004–2013)2007–2009Engine B4184S11, B4184S8, B4204S3 only
- Volvo S40 (2004–2013)2010Engine B4184S11, B4184S8, B4204S3, B4204S4 only
- Volvo S40 (2004–2013)2011–2012Engine B4204S3, B4204S4 only
- Volvo V50 (2004–2013)2005Engine B4184S11 only
- Volvo V50 (2004–2013)2006Engine B4184S11, B4184S8 only
- Volvo V50 (2004–2013)2007–2009Engine B4184S11, B4184S8, B4204S3 only
- Volvo V50 (2004–2013)2010Engine B4184S11, B4184S8, B4204S3, B4204S4 only
- Volvo V50 (2004–2013)2011–2012Engine B4204S3, B4204S4 only
What does this fault code mean?
The engine control module (ECM) has registered that the actual throttle angle is smaller than the requested angle. The cause may be poor contact, a damaged throttle unit or a damaged engine control module. The engine may then receive less throttle opening than the driver asks for.
Possible causes
- Contact resistance, oxidation or loose connections
- 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 vibration damper on the throttle unit is in place and correctly fitted
- 3Check the connectors at the throttle unit and the engine control module for play and corrosion
- 4If you have a diagnostic tool, check that the throttle angle in live data changes when the accelerator pedal is pressed
- 5Have a workshop replace the throttle unit if the fault remains after these checks
Symptoms you may notice4
- The check engine light comes on or behaves abnormally
- The engine does not start
- Poor performance or lack of power
- The engine hesitates or jerks
General guidance for car owners. Diagnosis on the car can point to a different cause.