Diagnostic trouble code (DTC) information

Condition

Fig 1: Identifying Canister Purge (CP) Valve

Courtesy of VOLVO CARS OF NORTH AMERICA.

During leak diagnostics, the relevant components are checked. Diagnostic trouble code (DTC) ECM-4047 is stored if the engine control module (ECM) registers a fault in the canister purge (CP) valve or EVAP canister shut-off valve.

Substitute Value

fuel trim disabled
Canister purge (CP) valve disabled.

Possible Source

EVAP canister shut-off valve leakage:

defective hoses
defective EVAP canister shut-off valve.

Canister purge (CP) valve leakage:

defective hoses
defective canister purge (CP) valve.

EVAP canister shut-off valve clogged:

clogged hoses
defective EVAP canister shut-off valve.

Fault symptom[s]

None.