Mazda CX-9 Grand Touring 2009 Manual page 1090

2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
Are any DTC present?
DTC P0457 [MZI-3.7]
DTC P0457 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES
DTC P0457 Evaporative emission system leak detected (fuel cap loose/off)
DETECTION
CONDITION
POSSIBLE CAUSE
DIAGNOSTIC PROCEDURE
DTC P0457 (MZI-3.7) DIAGNOSTIC PROCEDURE
STEP INSPECTION
VERIFY FREEZE FRAME DATA HAS
BEEN RECORDED
1
Has FREEZE FRAME DATA been
recorded?
VERIFY RELATED REPAIR
INFORMATION AVAILABILITY
Verify related Service Bulletins
2
and/or on-line repair information
availability.
Is any related Service Bulletins
available?
VERIFY RELATED PENDING CODE
OR STORED DTCs
Turn the ignition switch off then to
the ON position (Engine off).
Verify related pending code or stored
DTCs.
3
Are other DTCs present?
NOTE:
If DTC P0455 is present,
diagnose that DTC first. (See
ENGINE CONTROL SYSTEM
OPERATION INSPECTION
[MZI-3.7] .)
INSPECT FOR MISSING OR
2008 Mazda CX-9 Grand Touring
No
P0457 indicates that the initial vacuum could not be achieved after a
refueling event and the purge vapor flow is excessive (gross leak).
Missing or loose fuel filler cap.
Yes Go to the next step.
No
Yes
No
Yes
No
Troubleshooting completed.
ACTION
Record FREEZE FRAME DATA on the repair
order, then go to the next step.
Perform repair or diagnosis according to the
available Service Bulletins.
If the vehicle is not repaired, go to the next
step.
Go to the next step.
Go to the appropriate DTC troubleshooting. (See
DTC TABLE [MZI-3.7].)
Go to the next step.