VOLVO
ECM-950D - Engine control module (ECM), idle speed control. Signal too low
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:
4 modelsC30 (2007–2013), C70 (2006–2013), S40 (2004–2013), V50 (2004–2013)
Show models by year and engine (9)
- Volvo C30 (2007–2013)2007Engine B5254T3 only
- Volvo C30 (2007–2013)2008–2013Engine B5254T7 only
- Volvo C70 (2006–2013)2006–2007Engine B5254T3 only
- Volvo C70 (2006–2013)2008–2013Engine B5254T7 only
- Volvo S40 (2004–2013)2006–2007Engine B5254T3 only
- Volvo S40 (2004–2013)2008Engine B5254T3, B5254T7 only
- Volvo S40 (2004–2013)2009–2012Engine B5254T7 only
- Volvo V50 (2004–2013)2006–2007Engine B5254T3 only
- Volvo V50 (2004–2013)2008–2012Engine B5254T7 only
What does this fault code mean?
The ECM sets the code when the actual idle speed stays below its limit for a certain time. The cause may be a blocked intake or exhaust system, which the driver may notice as low or uneven idle.
Possible causes
- Blocked intake system
- Blocked exhaust system
What you can do
- 1If the idle is low and unsteady: check that the intake and exhaust systems are not blocked
- 2If the idle is high and unsteady: check that the intake has no leaks or damage
- 3Clear the obstruction and check whether the idle becomes normal. If the fault remains, have a workshop with diagnostic equipment fault-trace further
Symptoms you may notice3
- Malfunction indicator lamp (MIL) on
- Low idle speed
- Uneven idle
General guidance for car owners. Diagnosis on the car can point to a different cause.