DTC P0040, P0041 [MZI-3.5]
DTC P0040, P0041 (MZI-3.5) DETECTION CONDITION AND POSSIBLE CAUSES
DIAGNOSTIC PROCEDURE
DTC P0040, P0041 (MZI-3.5) DIAGNOSTIC PROCEDURE
disconnected connectors.
z
Clear the DTC from the PCM
memory using the M-MDS.
z
Turn the ignition switch off.
z
Start the engine and warm it up
completely.
z
Is the PENDING CODE for this
DTC present?
3.5]
.)
No
Go to the next step.
7
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 P0040
P0040: Front HO2S (LH/RH) signals swapped
DTC P0041
P0041: Rear HO2S (LH/RH) signals swapped
DETECTION
CONDITION
z
P0040 indicates that during KOER testing, the front HO2S signal(s)
response for a fuel shift to the correct engine bank was not indicated.
z
P0041 indicates that during KOER testing, the rear HO2S signal(s) response
for a fuel shift to the correct engine bank was not indicated.
POSSIBLE CAUSE
z
Crossed HO2S harness connectors.
z
Crossed wiring at HO2S harness connectors.
z
Crossed wiring at PCM harness connector.
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
Yes
Perform repair or diagnosis according to
2007 Mazda CX-9 Grand Touring
2007 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.5) - CX-9
Microsoft
Sunday, November 15, 2009 9:26:29 AM
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