| P115D | Mass air flow (MAF) sensor signal offset |
|---|---|
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DETECTION CONDITION
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• The PCM monitors MAF signal using the MAF sensor. If the MAF sensor signal is lower or higher than threshold when the engine shut down, the PCM determines that the MAF sensor signal offset error.
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POSSIBLE CAUSE
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• Contaminants on MAF sensor
• MAF sensor malfunction
• PCM malfunction
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Diagnostic procedure
| STEP | INSPECTION | ACTION | |
|---|---|---|---|
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1
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VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
• Has the 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 the FREEZE FRAME DATA on the repair order, then go to the next step.
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2
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VERIFY REPAIR INFORMATION AVAILABILITY
• Verify related service repair information availability.
• Is any related repair information available?
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Yes
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Perform repair or diagnosis according to the available repair 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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IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA
• Is P115D on FREEZE FRAME DATA?
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Yes
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Go to the next step.
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No
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Go to troubleshooting procedures for DTC in FREEZE FRAME DATA.
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4
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INSPECT MAF SENSOR CONDITION
• Turn the engine switch off.
• Remove the MAF sensor.
• Inspect MAF sensor condition.
• Is there any contaminants (oil, water, dust, etc.) on MAF sensor?
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Yes
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Remove contaminates from MAF sensor, then 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 THAT DTC P115D TROUBLESHOOTING IS COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the PCM memory using the M-MDS.
• Start the engine and warm-up to normal operating temperature.
• Race the engine for several times.
• Retrieve the DTC using the M-MDS.
• Is the PENDING CODE same DTC present?
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Yes
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Replace MAF sensor, then go to the next step.
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No
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Go to the next step.
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6
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VERIFY AFTER REPAIR PROCEDURE
• Perform “After Repair Procedure”.
• Is there any DTC present?
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Yes
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Go to the applicable DTC inspection.
If the DTC P115D presents replace the PCM.
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No
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Troubleshooting completed.
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