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Home >> Subaru >> 2013 >> Legacy Premium, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 37 (Engine Controls (Diagnostics) (H4DOTC)) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P1451 Evaporative Emission Cont. SYS. >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2013 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.
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. < Refer to CANISTER . > 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 H , PROCEDURE, Drive Cycle. >		 Is DTC P1451 displayed on the display? Replace the leak check valve assembly. < Refer to LEAK CHECK VALVE ASSEMBLY . > End.
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