VOLVO
ECM-2A00 - Fuel temperature sensor. Faulty signal
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:
9 modelsC30 (2007–2013), C70 (2006–2013), S40 (2004–2013), S60 (2001–2009), S80 (1999–2006), V50 (2004–2013), V70 (2000–2008), V70 XC / XC70 (2001–2007), XC90 (2003–)
Show models by year and engine (14)
- Volvo C30 (2007–2013)2007Engine B5254T3 only
- Volvo C30 (2007–2013)2008–2013Engine B5254T7 only
- Volvo C70 (2006–2013)2006–2007Engine B5254T3 only
- Volvo C70 (2006–2013)2008–2013Engine B5254T7 only
- Volvo S40 (2004–2013)2006–2007Engine B5254T3 only
- Volvo S40 (2004–2013)2008Engine B5254T3, B5254T7 only
- Volvo S40 (2004–2013)2009–2012Engine B5254T7 only
- Volvo S60 (2001–2009)2006Engine B5204T5, B5244T4, B5244T5, B5254T2, B5254T4 only
- Volvo S80 (1999–2006)2006Engine B5204T5, B5254T2 only
- Volvo V50 (2004–2013)2006–2007Engine B5254T3 only
- Volvo V50 (2004–2013)2008–2012Engine B5254T7 only
- Volvo V70 (2000–2008)2006Engine B5204T5, B5244T5, B5254T2, B5254T4 only
- Volvo V70 XC / XC70 (2001–2007)2006Engine B5244T4, B5254T2 only
- Volvo XC90 (2003–)2006Engine B5254T2 only
What does this fault code mean?
The engine control module reads the fuel temperature sensor, which sits inside the fuel pressure sensor. The code is set when that signal is judged incorrect. The cause may be a short in the signal wire, an open signal or ground wire, poor contact or a damaged sensor.
Possible causes
- Contact resistance or oxidation in the connections
- Signal wire shorted to supply voltage
- Signal wire shorted to ground
- Break in the signal wire or in the signal ground wire
- Damaged fuel temperature sensor
What you can do
- 1Read the code, clear it and drive for a while to see whether it returns
- 2Switch off the ignition and check the connector at the fuel pressure sensor, which also carries the temperature sensor: it should be secure and clean
- 3With the car switched off, use a multimeter to check that the signal wire is not broken and has no contact with voltage or ground
- 4Check that the ground wire is not broken
- 5If you have a diagnostic tool: read the fuel temperature in live data with the engine running and see whether the value is sensible and changes as the engine warms up
- 6If the connector and wiring are in order but the fault remains, have a workshop continue the fault tracing and replace the sensor if needed
Symptoms you may notice1
- No noticeable symptoms for the driver
General guidance for car owners. Diagnosis on the car can point to a different cause.