DTC P1451: EVAP System Clog Detected (Pipe): Notes

DTC detecting condition:

Detected when two consecutive driving cycles with fault occur.

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

CHECK DRAIN TUBE BETWEEN CANISTER AND LEAK CHECK VALVE ASSEMBLY.
Check the drain tube.

Is the drain tube between canister and leak check valve assembly clogged?

Yes: Replace the drain tube between the canister and leak check valve assembly. Refer to EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES) (EXCEPT FOR STI)>LEAK CHECK VALVE ASSEMBLY .

No: Go to 2.
CHECK HOSE AND TUBE BETWEEN CANISTER AND FUEL TANK.
Check the hose or tube between the canister and fuel tank.

Are the hose and tube between the canister and fuel tank clogged?

Yes: Replace the hose or tube between the canister and fuel tank. Refer to EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES) (EXCEPT FOR STI)>CANISTER . Refer to FUEL INJECTION (FUEL SYSTEMS) (EXCEPT FOR STI)>FUEL TANK .

No: Replace the canister. Refer to EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES) (EXCEPT FOR STI)>CANISTER . After the operation is complete, go to the next step. Go to 3.
CHECK EVAPORATIVE EMISSION CONTROL SYSTEM.
Perform drive cycle I. Refer to ENGINE (DIAGNOSTICS) (EXCEPT FOR STI)>Drive Cycle>PROCEDURE>DRIVE CYCLE I .

Is DTC P1451 displayed on the display? (Current malfunction)

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

No: End.