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 Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>Clear Memory Mode>OPERATION . and Inspection Mode Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>Inspection Mode>PROCEDURE .

CHECK DRAIN TUBE BETWEEN 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) (H4DOTC)>Leak Check Valve Assembly .
- No : Go to 2.
CHECK HOSE AND TUBE BETWEEN 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) (H4DOTC)>Canister . Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DOTC)>Fuel Tank .
- No : Replace the canister. Ref. to EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES) (H4DOTC)>Canister .
  After the operation is complete, go to the next step. Go to 3.
CHECK EVAPORATIVE EMISSION CONTROL SYSTEM.
Perform drive cycle I. Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>Drive Cycle>PROCEDURE>DRIVE CYCLE I .

Is DTC P1451 displayed on the display?
- Yes : Replace the leak check valve assembly. Ref. to EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES) (H4DOTC)>Leak Check Valve Assembly .
- No : End.