DTC P1451 Evaporative Emission Cont. SYS.: DTC Detecting Condition

WARNING: This page is about a different car, the 2012 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.

Detected when two consecutive driving cycles with fault occur.
GENERAL DESCRIPTION < refer to DTC P1451 EVAPORATIVE EMISSION CONT. SYS. , Diagnostic Trouble Code (DTC) Detecting Criteria. >
CAUTION: After servicing or replacing faulty parts, perform Clear Memory Mode < refer to OPERATION , Clear Memory Mode. >, and Inspection Mode < refer to PROCEDURE , Inspection Mode. >.

DIAGNOSIS PROCEDURE

Step	Check	Yes	No
1 CHECK DRAIN TUBE BETWEEN CANISTER AND LEAK CHECK VALVE ASSEMBLY.	Is the drain tube between canister and leak check valve assembly clogged?	Replace the drain tube between the canister and leak check valve assembly. < refer to CANISTERS . >	Go to step 2 .
2 CHECK HOSES BETWEEN CANISTER AND FUEL TANK.	Are the hoses between the canister and fuel tank clogged?	Replace the hoses between the canister and fuel tank. < refer to CANISTER . > < refer to FUEL TANK . >	Replace the canister. < refer to CANISTER . > After the operation is complete, go to the next step. Go to step 3 .
3 CHECK EVAPORATIVE EMISSION CONTROL SYSTEM. Perform drive cycle I. < refer to DRIVE CYCLE I , PROCEDURE, Drive Cycle. >	Is DTC P1451 displayed on the display?	Replace the leak check valve assembly. < refer to LEAK CHECK VALVE ASSEMBLY . >	End.