VOLVO
ECM-2A1B - Fuel temperature sensor. Signal too low
System
Engine Control Module (ECM)
Volvo models this fault code applies to
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 control module compares the fuel temperature during driving with the intake air and engine temperatures. If the fuel temperature is too far below the others, the fault is set. The cause may be poor contact or a damaged fuel temperature sensor.
Possible causes
- Contact resistance or oxidation in the connections
- Damaged fuel temperature sensor
What you can do
- 1Check that the connector at the fuel pressure sensor is secure and free from contact resistance and oxidation
- 2If you have a diagnostic tool: read the fuel temperature at idle and compare it with engine temperature. Once the car has cooled, the two should be about equal
- 3With the car switched off, check the connector and wires to the sensor for play and oxidation
- 4If the connector is in order but the fault remains, have a workshop check the fuel temperature sensor with diagnostic equipment
Symptoms you may notice1
- Malfunction indicator lamp (MIL) lit
What the fault can affect1
- A predefined value is used for the fuel temperature
General guidance for car owners. Diagnosis on the car can point to a different cause.