VOLVO
ECM-P050C00 - Cold Start Engine Coolant Temperature Performance. General Failure Information. No sub type information
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
8 modelsS60 (2011–), S80 (2007–), V40 (2013–), V40 Cross Country (2013–), V60 (2011–), V70 (2008–), XC60 (2009–), XC70 (2008–)
Show models by year and engine (8)
- Volvo S60 (2011–)2014–2015Engine B4204T10, B4204T11, B4204T12, B4204T15, B4204T9 only
- Volvo S80 (2007–)2014–2015Engine B4204T11, B4204T12, B4204T15 only
- Volvo V40 (2013–)2015Engine B4204T11 only
- Volvo V40 Cross Country (2013–)2015Engine B4204T11 only
- Volvo V60 (2011–)2014–2015Engine B4204T11, B4204T12, B4204T15, B4204T9 only
- Volvo V70 (2008–)2014–2015Engine B4204T11 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?
During engine warm-up the ECM compares how the temperature rises with the increase it expects, calculated from factors such as load and starting temperature. The code is set when the engine temperature reading is too far from the calculated value. The fault may lie in the sensor, its wiring or the thermostat.
Possible causes
- Contact resistance or oxidation in the wiring and connectors to the engine temperature sensor
- Signal wire in contact with ground
- Signal wire in contact with supply voltage
- Damaged thermostat
- Damaged coolant temperature sensor
What you can do
- 1Read the codes in the engine control module and note whether any other fault codes are present
- 2Check the connector and wiring to the coolant temperature sensor for oxidation, loose contacts and chafing
- 3If you have a diagnostic tool, follow the coolant temperature in live data while the engine warms up and check that it rises smoothly
- 4Check that the fuses are intact
- 5Use a multimeter to check that the signal wire to the temperature sensor has no contact with ground or supply voltage
- 6If the fault returns, have a workshop with diagnostic equipment check the sensor and the thermostat
Symptoms you may notice1
- The check engine lamp lights or behaves abnormally
General guidance for car owners. Diagnosis on the car can point to a different cause.