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Home >> Subaru >> 2017 >> WRX STI >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (Diagnostics) (P081A To P2097) (2.5L) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P1451 EVAP System Clog Detected (Pipe) >> Notes
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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 <Ref. to OPERATION , Clear Memory Mode.>, and Inspection Mode <Ref. to PROCEDURE , Inspection Mode.>.
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 CHECK HOSE AND TUBE BETWEEN CANISTER AND FUEL TANK.  Are the hose and tube between the canister and fuel tank clogged? Replace the hose or tube 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 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.