VOLVO
ECM-443B - Fuel level sensor. Signal too low
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
5 modelsS60 (2001–2009), S80 (1999–2006), V70 (2000–2008), V70 XC / XC70 (2001–2007), XC90 (2003–)
Show models by year and engine (11)
- Volvo S60 (2001–2009)2006Engine B5204T5, B5244T4, B5244T5, B5254T2, B5254T4 only
- Volvo S60 (2001–2009)2007Engine B5204T5, B5244T5, B5254T2, B5254T4 only
- Volvo S60 (2001–2009)2008–2009Engine B5204T5, B5244T5, B5254T2 only
- Volvo S80 (1999–2006)2006Engine B5204T5, B5254T2 only
- Volvo V70 (2000–2008)2006–2007Engine B5204T5, B5244T5, B5254T2, B5254T4 only
- Volvo V70 (2000–2008)2008Engine B5254T2 only
- Volvo V70 XC / XC70 (2001–2007)2006Engine B5244T4, B5254T2 only
- Volvo V70 XC / XC70 (2001–2007)2007Engine B5254T2 only
- Volvo XC90 (2003–)2006–2012Engine B5254T2 only
- Volvo XC90 (2003–)2013–2014Engine B5254T9 only
- Volvo XC90 (2003–)2015
What does this fault code mean?
Fuel information reaches the engine control module through the central electronic module (CEM). The code concerns a signal that is too low, and it is set when the engine control module has a communication problem with the CEM. The code is set in the CEM first and then in the engine control module.
Possible causes
- One of the CAN wires has a break
- The CAN wires are shorted to each other
- Another module on the same part of the CAN network has an internal fault
What you can do
- 1Start by reading the fault codes in the CEM and remedying what is found
- 2Erase the codes in the CEM once they are remedied, then remove this code
- 3Look at the connectors on the CAN network and see whether any are loose or corroded
- 4If the fault remains, have a workshop with diagnostic equipment measure the CAN network to see where communication breaks
Symptoms you may notice1
- Fuel gauge shows the wrong level, often too low
General guidance for car owners. Diagnosis on the car can point to a different cause.