DTC P0040:00, P0041:00 [MZI-3.7 (PCM CONNECTOR (3 TYPES))]
id0102e4311200
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DTC P0040:00 DTC P0041:00 |
P0040:00: A/F sensor (LH/RH) signals swapped P0041:00: HO2S (LH/RH) signals swapped |
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DETECTION CONDITION
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• P0040:00 indicates that during KOER testing, the A/F sensor signal(s) response for a fuel shift to the correct engine bank was not indicated.
• P0041:00 indicates that during KOER testing, the HO2S signal(s) response for a fuel shift to the correct engine bank was not indicated.
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POSSIBLE CAUSE
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• P0040:00: Crossed A/F sensor harness connectors.
• P0040:00: Crossed wiring at A/F sensor harness connectors.
• P0041:00: Crossed HO2S harness connectors.
• P0041:00: Crossed wiring at HO2S harness connectors.
• Crossed wiring at PCM harness connector.
• PCM malfunction
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Diagnostic procedure
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STEP |
INSPECTION |
ACTION |
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1
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VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
• Has FREEZE FRAME DATA been recorded?
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Yes
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Go to the next step.
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No
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Record FREEZE FRAME DATA on the repair order, then go to the next step.
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2
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VERIFY RELATED SERVICE INFORMATION AVAILABILITY
• Verify related Service Information availability.
• Is any related Service Information available?
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Yes
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Perform repair or diagnosis according to the available Service Information.
• If the vehicle is not repaired, go to the next step.
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No
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Go to the next step.
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3
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INSPECT A/F SENSOR/HO2S WIRING HARNESS CONNECTORS
• For P0040:00, visually inspect the vehicle A/F sensor wiring harness connector (s) for any indication of crossed wires (Also, stretched or incorrectly mounted wiring harnesses).
• For P0041:00, visually inspect the vehicle HO2S wiring harness connector (s) for any indication of crossed wires (Also, stretched or incorrectly mounted wiring harnesses).
• For P0040:00, P0041:00, visually inspect the vehicle PCM of A/F sensor/HO2S signals wiring harness connector (s) for any indication of crossed wires (Also, stretched or incorrectly mounted wiring harnesses).
• Are there crossed connections or wires?
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Yes
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Repair if necessary.
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No
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Unable to duplicate or identify the cause of concern at this time.
Perform the “INTERMITTENT CONCERN TROUBLESHOOTING” procedure.
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4
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VERIFY TROUBLESHOOTING OF DTC P0040:00, P0041:00 HAS BEEN COMPLETED
• Verify that all disconnected connectors reconnected.
• Turn the ignition switch to the ON position (Engine off).
• Clear the DTC from the PCM memory using the M-MDS.
• Start the engine and run it at idle.
• Perform the KOER self-test.
• Is the PENDING CODE for this DTC present?
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Yes
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Repeat the inspection from Step 1.
• If the malfunction recurs, replace the PCM.
Go to the next step.
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No
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Go to the next step.
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5
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VERIFY AFTER REPAIR PROCEDURE
• Perform the “AFTER REPAIR PROCEDURE”.
• Are any DTCs present?
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Yes
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Go to the applicable DTC inspection.
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No
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Troubleshooting completed.
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