What does fault code ECM-P062000 mean?

Diagnostic fault code details for ECM-P062000 (Volvo S60 (2011–), Volvo S80 (2007–), Volvo S80 (2007–)). Repair service at OBD Tuning.

VOLVO

ECM-P062000 - Generator Control Circuit. General Failure Information. No sub type information

System

Engine Control Module (ECM)

Volvo models this fault code applies to

Applies to the following models:

3 models

S60 (2011–), S80 (2007–), V70 (2008–)

Show models by year and engine (9)

What does this fault code mean?

The engine control module communicates with the alternator control module (ACM) over LIN, and the fault is set when the ACM reports that the alternator temperature is above a certain value, or that the alternator is stationary while the engine speed is high. The cause may therefore be a mechanical problem in the drive or blocked air paths to the alternator.

Possible causes

Defective auxiliary drive belt and belt tensioner
Damaged freewheel
Damaged alternator
The air intake and/or air outlet to the alternator is blocked

What you can do

1With the ignition off, check the drive belt and belt tensioner for damage
2Check that the air intake and the air outlet to the alternator are not blocked
3Check that the alternator freewheel works, so that the rotor shaft can turn freely in one direction but not in the other
4If you have a diagnostic tool: read the fault status after driving to see whether the code returns
5If the fault returns after driving: have a workshop replace the alternator

Symptoms you may notice5

The "Generator not charging" warning lamp lights when the engine is running
The battery discharges
The starter motor turns over slowly
Noise from the alternator or from the drive belt
The engine judders under acceleration

General guidance for car owners. Diagnosis on the car can point to a different cause.