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

DTC detecting condition:

Detected when two consecutive driving cycles with fault occur.

NOTE: After the faulty parts are repaired or replaced, perform the final check in Basic Diagnostic Procedure. Ref. to ENGINE (DIAGNOSTICS) (H4DO)>Basic Diagnostic Procedure>PROCEDURE .

CHECK DRAIN TUBE BETWEEN CANISTER AND LEAK CHECK VALVE ASSEMBLY .
Check the drain tube between the canister and leak check valve assembly.

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. Ref. to EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES) (H4DO)>CANISTER .

No: Go to 2.
CHECK HOSE AND TUBE BETWEEN CANISTER AND FUEL TANK .
Check the hose and 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. Ref. to EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES) (H4DO)>CANISTER . Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DO)>Fuel Tank.

No: Replace the canister. Ref. to EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES) (H4DO)>CANISTER .

After the operation is complete, go to the next step. Go to 3.
CHECK EVAPORATIVE EMISSION CONTROL SYSTEM .
Perform the inspection mode I. Ref. to ENGINE (DIAGNOSTICS) (H4DO)>Inspection Mode>PROCEDURE>INSPECTION MODE I .

Is DTC P1451 displayed? (Current malfunction)

Yes: Replace the leak check valve assembly. Ref. to EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES) (H4DO)>LEAK CHECK VALVE ASSEMBLY .

No: End.