Diagnostic trouble code (DTC) information
WARNING: This page is about a different car, the 2004 Volvo S40, 2003 Volvo S40, 2002 Volvo S40, 2001 Volvo S40, and 2000 Volvo S40. However, it is still accessible from the selected car via links, so may be relevant.
Condition
Diagnostic trouble code (DTC) ECM-A1 is stored if the control module detects that the correct engine coolant temperature (ECT) is not reached or that the engine coolant temperature (ECT) rises too slowly.
Substitute Value
None.
Possible Source
- Defective thermostat
- Defective engine coolant temperature (ECT) sensor
- Contact resistance in the terminals.
Fault symptom[s]
- Malfunction indicator lamp (MIL) lit
- Low engine coolant temperature (ECT)
- The engine coolant temperature (ECT) warning lamp is lit.