VOLVO
ECM-P151B68 - Idle Speed Control - RPM Lower Than Expected. Algorithm Based Failures. Event information
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
10 modelsS60 (2011–), S80 (2007–), V40 (2013–), V40 Cross Country (2013–), V60 (2011–), V60 Cross Country (2015–), V70 (2008–), XC60 (2009–), XC70 (2008–), XC90 (2003–)
Show models by year and engine (27)
- Volvo S60 (2011–)2011–2012Engine B6304T4 only
- Volvo S60 (2011–)2013–2014Engine B5204T8, B5204T9, B5254T12, B5254T14, B6304T4 only
- Volvo S60 (2011–)2015Engine B5204T8, B5204T9, B5254T12, B5254T14, B6304T3, B6304T4, B6304T5 only
- Volvo S80 (2007–)2007Engine B6324S, B8444S only
- Volvo S80 (2007–)2008–2009Engine B6304T2, B6324S, B8444S only
- Volvo S80 (2007–)2010Engine B6324S2 only
- Volvo S80 (2007–)2011–2015Engine B6324S4 only
- Volvo V40 (2013–)2013–2014Engine B5204T8, B5204T9, B5254T12, B5254T14 only
- Volvo V40 (2013–)2015Engine B5204T8, B5204T9 only
- Volvo V40 Cross Country (2013–)2013–2015Engine B5204T8, B5204T9, B5254T12, B5254T14 only
- Volvo V60 (2011–)2011–2012Engine B6304T4 only
- Volvo V60 (2011–)2013Engine B5204T8, B5204T9, B6304T4 only
- Volvo V60 (2011–)2014Engine B5204T8, B5204T9, B5254T12, B6304T4 only
- Volvo V60 (2011–)2015Engine B5204T9, B5254T12, B6304T3, B6304T4, B6304T5 only
- Volvo V60 Cross Country (2015–)2015
- Volvo V70 (2008–)2008–2009Engine B6304T2, B6324S only
- Volvo V70 (2008–)2010Engine B6324S2 only
- Volvo XC60 (2009–)2009Engine B6304T2 only
- Volvo XC60 (2009–)2010Engine B6304T2, B6324S2 only
- Volvo XC60 (2009–)2011–2014Engine B6304T4, B6324S4 only
- Volvo XC60 (2009–)2015Engine B5204T9, B5254T12, B5254T14, B6304T4, B6324S4 only
- Volvo XC70 (2008–)2008Engine B6324S only
- Volvo XC70 (2008–)2009Engine B6304T2, B6324S only
- Volvo XC70 (2008–)2010Engine B6324S2 only
- Volvo XC70 (2008–)2011–2015Engine B6324S4 only
- Volvo XC90 (2003–)2007–2010Engine B6324S only
- Volvo XC90 (2003–)2011–2014Engine B6324S5 only
What does this fault code mean?
The code is event controlled, which means it is an information code and does not show a fault in the engine control module. The engine control module (ECM) sets the code if the engine speed has been outside the limit for engine stall. It does not indicate a fault that needs correcting, and it disappears when the conditions no longer apply.
Possible causes
- The code can be set without any fault needing correction
What you can do
- 1Check that the engine runs smoothly at idle. If it does, no action is needed for the code.
- 2Clear the code and run the engine at idle for a while. If the code does not return, it is gone.
- 3If the code returns together with uneven idle, have a workshop check the idle speed control.
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.