VOLVO
ECM-0652 - Power supply 2. 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 (10)
- Volvo C30 (2007–2013)2007Engine D4204T only
- Volvo C30 (2007–2013)2008–2010Engine D4204T only · Transmission MMT6, MPS6 only
- Volvo C70 (2006–2013)2008Engine D4204T only
- Volvo C70 (2006–2013)2009–2010Engine D4204T only · Transmission MMT6, MPS6 only
- Volvo S40 (2004–2013)2004–2006Engine D4204T, D4204T2 only
- Volvo S40 (2004–2013)2007Engine D4204T only
- Volvo S40 (2004–2013)2008–2010Engine D4204T only · Transmission MMT6, MPS6 only
- Volvo V50 (2004–2013)2004–2006Engine D4204T, D4204T2 only
- Volvo V50 (2004–2013)2007Engine D4204T only
- Volvo V50 (2004–2013)2008–2010Engine D4204T only · Transmission MMT6, MPS6 only
What does this fault code mean?
The supply voltage to a sensor is too low, and the ECM sets the code. The cause may be poor connections, or a supply wire shorted to earth. The fault shows as a warning symbol and text message in the display.
Possible causes
- Poor connections, or oxidation in the connections
- Supply wire to the sensor in contact with earth
What you can do
- 1Check the connectors at the engine control module for contact resistance and oxidation
- 2Inspect the wiring to the sensor for chafing, since chafed wire can touch earth
- 3With the ignition off, use a multimeter to check the sensor's supply wire for contact with the body
- 4If the fault remains, have a workshop read the sensor with diagnostic equipment and remedy what is found
Symptoms you may notice1
- Warning symbol and text message in the display
General guidance for car owners. Diagnosis on the car can point to a different cause.