VOLVO
ECM-P011618 - Engine Coolant Temperature Circuit Range/Performance. General Electrical Failures. Circuit voltage below threshold
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
3 modelsS60 (2011–), S80 (2007–), V70 (2008–)
Show models by year and engine (9)
- Volvo S60 (2011–)2011–2012Engine B5254T5 only
- Volvo S80 (2007–)2007–2008Engine B5254T6 only
- Volvo S80 (2007–)2009Engine B5254T6, B5254T8 only
- Volvo S80 (2007–)2010–2011Engine B5254T10, B5254T11, B5254T8 only
- Volvo S80 (2007–)2012Engine B5254T10 only
- Volvo V70 (2008–)2008Engine B5254T6 only
- Volvo V70 (2008–)2009Engine B5254T6, B5254T8 only
- Volvo V70 (2008–)2010–2011Engine B5254T10, B5254T11 only
- Volvo V70 (2008–)2012Engine B5254T10 only
What does this fault code mean?
After start-up the engine control module (ECM) works out a theoretical coolant temperature from time since start, engine speed and load. If the sensor signal sits below that figure, the fault code is set.
Possible causes
- Contact resistance and oxidation in the connectors
- Damaged temperature sensor
What you can do
- 1Read the fault code status with the ignition on and check whether the fault is active. Clear the code and road test the vehicle
- 2Check the connector at the engine temperature sensor for contact resistance and oxidation
- 3Read the coolant temperature sensor signal in live data and check that the temperature is reasonable and follows the engine warming up
- 4Check the coolant level and antifreeze protection. A frozen sensor can produce this code. Take care, as the cooling fan can run with the ignition off
- 5If the connector is in order and the fault remains, have a workshop check or replace the sensor
Symptoms you may notice2
- The emissions warning lamp is lit
- The engine is difficult to start
General guidance for car owners. Diagnosis on the car can point to a different cause.