VOLVO
ECM-182A - Battery voltage. Battery voltage 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 monitors the battery voltage and sets the fault code when it is too low. The fault may come from a faulty battery or poor contact in the battery circuit.
Possible causes
- Defective battery
- Contact resistance in the connections
What you can do
- 1Check the condition of the battery and that it is sufficiently charged
- 2Check that the battery terminals and the connections in the battery circuit are tight and free of oxidation
- 3If you have a diagnostic tool: read the battery voltage in live data while the engine runs and see whether it rises
- 4If the fault remains, have a workshop check that the charging system gives the correct voltage and that the module's supply is sound
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.