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

Fig 1: Identifying Canister Purge (CP) Valve

Courtesy of VOLVO CARS OF NORTH AMERICA.

Diagnostic trouble code (DTC) ECM-5C is stored if the canister purge (CP) valve signal cable is short-circuited to ground or voltage or if there is an open-circuit in the circuit.

Substitute Value

No leak diagnostic
No idle air trim adaptation
No long-term fuel trim.

Possible Source

Signal too high:

Short-circuit to supply voltage in the signal cable
Defective canister purge (CP) valve.

Signal too low:

Short-circuit to ground in the signal cable.

Signal missing:

Open-circuit in the signal cable
Contact resistance and oxidation.

Fault symptom[s]

Malfunction indicator lamp (MIL) lit
High idling speed
Low idling speed.