DTC Diagnosis Procedure
1.
CHECK DTC PRIORITY
If DTC P0451 is displayed with other DTC, first perform the confirmation procedure (trouble diagnosis) for other DTC.
Is applicable DTC detected?
Perform diagnosis of applicable. Refer to
DTC Index
.
2.
CHECK HOSE AND PIPING
Turn ignition switch OFF.
Check the following.
Blockage, crush, or damage in the hose and the piping of EVAP purge line between fuel tank and intake manifold.
Blockage, crush, or damage in the hose and the piping of intake air passage between inlet air duct and intake manifold.
Is the inspection result normal?
.
Repair or replace error-detected parts.
3.
CHECK INTERMITTENT INCIDENT
Refer to Intermittent Incident
Intermittent Incident
.
Is the inspection result normal?
.
Repair or replace error-detected parts.
4.
REPLACE EVAP CANISTER
Replace EVAP canister. Refer to
Removal and Installation
.
:
.
5.
PERFORM DTC CONFIRMATION PROCEDURE
Turn ignition switch ON.
Erase DTC.
Perform DTC confirmation procedure. Refer to
DTC Description
.
Is DTC P0451 detected?
Replace ECM (Built in barometric pressure sensor)
INSPECTION END
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Perform diagnosis of applicable. Refer to DTC Index
..Repair or replace error-detected parts...Repair or replace error-detected parts..Replace ECM (Built in barometric pressure sensor)INSPECTION END