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

DTC detecting condition: 

Detected when two consecutive driving cycles with fault occur.

1. 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. Refer to FUEL INJECTION (FUEL SYSTEMS) (STI)>FUEL DELIVERY, RETURN AND EVAPORATION LINES .

   No:  Go to  2.

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. Refer to EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES) (STI)>PURGE CONTROL SOLENOID VALVE .

   No:  Go to  3.

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. Refer to INTAKE (INDUCTION) (STI)>TURBOCHARGER .

   No:  Go to  4.

4. CHECK EVAPORATIVE EMISSION CONTROL SYSTEM. 

   Perform drive cycle I. Refer to ENGINE (DIAGNOSTICS) (STI)>DRIVE CYCLE>PROCEDURE>DRIVE CYCLE I .

   Is DTC P04AF displayed on the display?

   Yes:  Replace the leak check valve assembly. Refer to EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES) (STI)>LEAK CHECK VALVE ASSEMBLY .

   No:  End.