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Home >> Subaru >> 2015 >> WRX Limited, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 7 (Engine Controls (Diagnostics) (H4DOTC) (STI)) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P1451 Evaporative Emission Cont. SYS. >> DTC Detecting Condition

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

WARNING: This page is about a different variant/trim than selected.
CAUTION: After servicing or replacing faulty parts, perform Clear Memory Mode <Ref. to OPERATION , Clear Memory Mode.>, and Inspection Mode <Ref. to PROCEDURE , Inspection Mode.>.
DIAGNOSTIC 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. <Ref. to LEAK CHECK VALVE ASSEMBLY .> 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. <Ref. to CANISTER .> <Ref. to FUEL TANK .> Replace the canister. <Ref. 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. <Ref. to DRIVE CYCLE I , PROCEDURE, Drive Cycle.>
Is DTC P1451 displayed on the display? Replace the leak check valve assembly. <Ref. to LEAK CHECK VALVE ASSEMBLY .> End.