VOLVO
ECM-531C - Vehicle speed signal (VSS). Signal missing
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
3 modelsC70 (2006–2013), S40 (2004–2013), V50 (2004–2013)
Show models by year and engine (7)
- 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 V50 (2004–2013)2006–2007Engine B5254T3 only
- Volvo V50 (2004–2013)2008–2012Engine B5254T7 only
What does this fault code mean?
The engine control module (ECM) reports that the vehicle speed signal is missing, and the code is stored. The code is set first in the central electronics module (CEM), so the fault may lie there as well as in the engine module. The environment lamp comes on, but the fault has no noticeable effect.
Possible causes
- Damaged engine control module (ECM)
What you can do
- 1Read and note the codes in the central electronics module (CEM) first
- 2Fix the faults in the CEM. The engine module's code can only be cleared once those are repaired and cleared
- 3If you have a diagnostic tool, compare the vehicle speed value in live data with the speedometer during a test drive
- 4If the fault remains, have a workshop check the engine control module and load new software or replace it
Symptoms you may notice1
- The environment lamp lights up
General guidance for car owners. Diagnosis on the car can point to a different cause.