VOLVO
ECM-P062074 - Generator Control Circuit. Mechanical Failures. Actuator slipping
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
7 modelsS60 (2011–), S80 (2007–), V60 (2011–), V70 (2008–), XC60 (2009–), XC70 (2008–), XC90 (2003–)
Show models by year and engine (13)
- Volvo S60 (2011–)2011–2014Engine B6304T4 only
- Volvo S60 (2011–)2015Engine B6304T3, B6304T4, B6304T5 only
- Volvo S80 (2007–)2007Engine B6324S, B8444S only
- Volvo S80 (2007–)2008–2009Engine B6304T2, B6324S, B8444S only
- Volvo V60 (2011–)2011–2014Engine B6304T4 only
- Volvo V60 (2011–)2015Engine B6304T3, B6304T4, B6304T5 only
- Volvo V70 (2008–)2008–2009Engine B6304T2, B6324S only
- Volvo XC60 (2009–)2009–2010Engine B6304T2 only
- Volvo XC60 (2009–)2011–2015Engine B6304T4 only
- Volvo XC70 (2008–)2008Engine B6324S only
- Volvo XC70 (2008–)2009Engine B6304T2, B6324S only
- Volvo XC90 (2003–)2005–2006, 2011Engine B8444S only
- Volvo XC90 (2003–)2007–2010Engine B6324S, B8444S only
What does this fault code mean?
The alternator control module (ACM) reports a mechanical fault to the engine control module over LIN: the alternator is stationary even though the engine speed is above a certain value. The fault therefore means the alternator is not following the drive, for example because the drive belt is slipping or the freewheel is damaged.
Possible causes
- Damaged auxiliary drive belt and belt tensioner
- Damaged freewheel
- Damaged alternator
What you can do
- 1Look at the auxiliary drive belt and belt tensioner and check for damage
- 2Check that the alternator freewheel works: it should drive the rotor shaft in one direction but not in the other
- 3If you have a diagnostic tool: read the fault status after driving to see whether the code returns
- 4If the fault returns after driving: have a workshop replace the alternator to see whether that helps
Symptoms you may notice5
- The battery discharges
- The starter motor turns over at low speed
- Noise from the alternator
- The engine judders under acceleration
- The charging warning lamp lights or behaves abnormally
General guidance for car owners. Diagnosis on the car can point to a different cause.