DTC P0454 [MZI-3.5]
DTC P0454 (MZI-3.5) DETECTION CONDITION AND POSSIBLE CAUSES
DIAGNOSTIC PROCEDURE
DTC P0454 (MZI-3.5) DIAGNOSTIC PROCEDURE
z
Make sure to reconnect all
disconnected connectors.
z
Turn ignition switch to the ON
position (Engine off).
z
Clear the DTC from the PCM
memory using the M-MDS.
z
Start the engine and warm it up
completely.
z
Is same DTC present?
REMOVAL/INSTALLATION [MZI-
3.5]
.)
No
Go to the next step.
10
VERIFY AFTER REPAIR
PROCEDURE
z
Perform the "After Repair
Procedure".
(See
AFTER REPAIR
PROCEDURE [MZI-3.5]
.)
z
Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See
DTC TABLE [MZI-3.5]
.)
No
Troubleshooting completed.
DTC P0454
Fuel tank pressure sensor intermittent
DETECTION
CONDITION
z
The fuel tank pressure changes more than 14 inches of water in 0.10 s.
POSSIBLE CAUSE
z
Intermittent open or short in the fuel tank pressure sensor or the fuel tank
pressure sensor signal
z
Fuel tank pressure sensor malfunction
STEP
INSPECTION
ACTION
1
VERIFY FREEZE FRAME DATA
HAS BEEN RECORDED
z
Has FREEZE FRAME DATA
been recorded?
Yes
Go to the next step.
No
Record FREEZE FRAME DATA on the
repair order, then go to the next step.
2
VERIFY RELATED REPAIR
INFORMATION AVAILABILITY
z
Verify related Service Bulletins
Yes
Perform repair or diagnosis according to
the available Service Bulletins.
z
If the vehicle is not repaired, go to
2007 Mazda CX-9 Grand Touring
2007 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.5) - CX-9
Microsoft
Sunday, November 15, 2009 9:26:33 AM
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