VOLVO
ECM-181C - Glow plug indicator lamp. Signal too low
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
2 modelsS40 (1996–2004), V40 (1996–2004)
Show models by year and engine (2)
What does this fault code mean?
The ECM drives the glow plug indicator in the instrument panel over its own control wire. If the signal on that wire is too low, for example from a short to ground or a break, fault code ECM-181C is set.
Possible causes
- Control signal wire shorted to ground
- Open circuit in the control signal wire
What you can do
- 1Switch off the ignition and check that the connectors to the instrument cluster are firmly seated and free of oxidation
- 2With a multimeter, check that the control wire to the glow plug indicator is not broken and not shorted to ground
- 3If you have a diagnostic tool: activate the glow plug indicator and check that it lights
- 4If the fault remains, have a workshop check the instrument cluster and its wiring
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.