DTC P04AF: EVAP System Purge Control Valve (CPC) "B" Stuck Closed: Notes

DTC detecting condition:

Detected when two consecutive driving cycles with fault occur.

CAUTION: After servicing or replacing faulty parts, perform Clear Memory Mode Ref. to ENGINE (DIAGNOSTICS) (EXCEPT FOR STI)>Clear Memory Mode>OPERATION , and inspection mode Ref. to ENGINE (DIAGNOSTICS) (EXCEPT FOR STI)>Inspection Mode>PROCEDURE .

CHECK BETWEEN CANISTER AND PURGE CONTROL VALVE 2 .
Check the piping between the canister and the purge control valve 2.

Is there clogging in the piping between the canister and the purge control valve 2?

Yes: Repair or replace the piping between the canister and the purge control valve 2. Ref. to FUEL INJECTION (FUEL SYSTEMS) (EXCEPT FOR STI)>Fuel Delivery and Evaporation Lines .

No: Go to 2.
CHECK BETWEEN CANISTER AND PURGE CONTROL VALVE 2 .
Check the piping between the canister and the purge control valve 2.

Is there closed stuck state in the piping between the canister and the purge control valve 2?

Yes: Repair or replace the purge control valve 2. Ref. to EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES) (EXCEPT FOR STI)>Purge Control Solenoid Valve .

No: Go to 3.
CHECK PIPING BETWEEN PURGE CONTROL VALVE 2 AND TURBOCHARGER .
Check the piping between the purge control valve 2 and the turbocharger.

Is there clogging in the piping between the purge control valve 2 and the turbocharger?

Yes: Repair or replace the piping between the purge control valve 2 and the turbocharger. Ref. to INTAKE (INDUCTION) (EXCEPT FOR STI)>Turbocharger .

No: Go to 4.
CHECK EVAPORATIVE EMISSION CONTROL SYSTEM .
Perform drive cycle I. Ref. to ENGINE (DIAGNOSTICS) (EXCEPT FOR STI)>Drive Cycle>PROCEDURE>DRIVE CYCLE O .

Is DTC P04AF displayed on the display? (Current malfunction)

Yes: Replace the leak check valve assembly. Ref. to EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES) (EXCEPT FOR STI)>Leak Check Valve Assembly .

No: End.