VOLVO
ECM-P065200 - Sensor Reference Voltage B Circuit Low. General Failure Information. No sub type information
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:
11 modelsC30 (2007–2013), S40 (2004–2013), S60 (2011–), S80 (2007–), V40 (2013–), V40 Cross Country (2013–), V50 (2004–2013), V60 (2011–), V70 (2008–), XC60 (2009–), XC70 (2008–)
Show models by year and engine (29)
- Volvo C30 (2007–2013)2011–2013Engine D4162T only
- Volvo S40 (2004–2013)2011–2012Engine D4162T only
- Volvo S60 (2011–)2011–2012Engine B5254T5, D4162T only
- Volvo S60 (2011–)2013Engine D4162T only
- Volvo S60 (2011–)2014–2015Engine B4204T10, B4204T11, B4204T12, B4204T15, B4204T9, D4162T only
- Volvo S80 (2007–)2007Engine B5254T6 only
- Volvo S80 (2007–)2008Engine B5254T6, D4204T only
- Volvo S80 (2007–)2009Engine B5254T6, B5254T8, D4204T only
- Volvo S80 (2007–)2010Engine B5254T10, B5254T11, B5254T8, D4204T only
- Volvo S80 (2007–)2011Engine B5254T10, B5254T11, B5254T8 only
- Volvo S80 (2007–)2012Engine B5254T10, D4162T only
- Volvo S80 (2007–)2013Engine D4162T only
- Volvo S80 (2007–)2014–2015Engine B4204T11, B4204T12, B4204T15, D4162T only
- Volvo V40 (2013–)2013–2014Engine D4162T only
- Volvo V40 (2013–)2015Engine B4204T11, D4162T only
- Volvo V40 Cross Country (2013–)2013–2014Engine D4162T only
- Volvo V40 Cross Country (2013–)2015Engine B4204T11, D4162T only
- Volvo V50 (2004–2013)2011–2012Engine D4162T only
- Volvo V60 (2011–)2011–2013Engine D4162T only
- Volvo V60 (2011–)2014–2015Engine B4204T11, B4204T12, B4204T15, B4204T9, D4162T only
- Volvo V70 (2008–)2008Engine B5254T6, D4204T only
- Volvo V70 (2008–)2009Engine B5254T6, B5254T8, D4204T only
- Volvo V70 (2008–)2010Engine B5254T10, B5254T11, D4204T only
- Volvo V70 (2008–)2011Engine B5254T10, B5254T11 only
- Volvo V70 (2008–)2012Engine B5254T10, D4162T only
- Volvo V70 (2008–)2013Engine D4162T only
- Volvo V70 (2008–)2014–2015Engine B4204T11, D4162T only
- Volvo XC60 (2009–)2014–2015Engine B4204T10, B4204T11, B4204T12, B4204T15, B4204T9 only
- Volvo XC70 (2008–)2014–2015Engine B4204T11 only
What does this fault code mean?
Reference voltage B is too low. The ECM checks the internal supply circuits for the components and sets the code when the voltage in one of them is abnormal. The cause may be wiring, a sensor, the battery or the charging system, but also the engine control module itself.
Possible causes
- Voltage cable to the sensor shorted to ground or supply voltage
- Damaged sensor
- Damaged engine control module (ECM)
- Battery voltage too low, or a damaged battery
- Fault in the charging system
What you can do
- 1If a fault code for a sensor connected to the supply is stored, trace that one first
- 2Check the battery condition and that the charging system works, and remedy as needed
- 3Check that the fuses are intact and that the connectors to the sensors are secure
- 4Use a multimeter to check that the wires to the sensors are not shorted to ground or supply voltage
- 5If the battery, charging and wiring are in order but the fault remains, have a workshop check the engine control module
Symptoms you may notice5
- The car performs poorly and lacks power, especially at take-off
- The engine misfires or stalls while driving
- The engine is difficult to start, the starter motor does not turn or turns but the engine does not start
- The engine hesitates or surges during acceleration, during deceleration or at steady speed
- Warning symbol and text message in the display
General guidance for car owners. Diagnosis on the car can point to a different cause.