DTC P1101, P2279 [MZ-CD 1.6 (Y6) (EURO4 emission level)]
id0102g6834500
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DTC P1101 DTC P2279 |
Mass air flow sensor signal — out of self-test range Intake-air system leakage |
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DETECTION CONDITION
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• The PCM monitors intake air flow using the MAF sensor signal. If the engine speed is 650 rpm or more and the intake air amount calculated from the MAF sensor signal for 4.5 s is not within the threshold calculated from the engine speed, the PCM determines that the MAF sensor signal is in error and/or the intake-air system has air leakage.
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POSSIBLE CAUSE
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• Air leakage from intake air system
• Incorrect vacuum hose routine
• Contamination in MAF sensor
• Turbocharger system in overboost condition
• 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 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 RELATED 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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VERIFY RELATED PENDING CODE AND/OR DTC
• Switch the ignition to off, then to ON (engine off).
• Perform the Pending Trouble Code Access Procedure and DTC Reading Procedure.
• Is the following PENDING CODE/DTC also 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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Go to the next step.
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4
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INSPECT FOR AIR LEKAGE AT INTAKE-AIR SYSTEM
• Inspect the intake-air system part for air leakage.
• Is there any air leakage in intake-air system?
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Yes
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Repair for air leakage, then go to Step 9.
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No
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Go to the next step.
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5
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INSPECT VACUUM HOSE ROUTINE
• Inspect the vacuum hose routine.
• Is the vacuum hose connected properly?
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Yes
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Go to the next step.
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No
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Reconnect the vacuum hose properly, then go to Step 9.
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6
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INSPECT MAF SENSOR FOR CONTAMINATION
• Remove the MAF/IAT sensor.
• Visually inspect MAF sensor.
• Is there any contamination?
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Yes
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Clean or replace the MAF/IAT sensor, then go to Step 9.
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No
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Go to the next step.
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7
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INSPECT VBC SOLENOID VALVE
• Inspect the VBC solenoid valve.
• Is there any malfunction?
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Yes
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Replace the VBC solenoid valve, then go to Step 9.
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No
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Go to the next step.
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8
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INSPECT GUIDE BLADE FOR STUCK
• Disconnect the guide blade actuator vacuum hose.
• Connect the hand held vacuum pump to the guide blade actuator.
• Apply and release the vacuum to guide blade actuator and verify that the guide blade rod condition.
• Does the guide blade actuator rod move?
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Yes
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Replace the turbocharger, then go to the next step.
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No
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Go to the next step.
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9
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VERIFY THAT DTC P1101 AND/OR P2279 TROUBLESHOOTING IS COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the PCM memory using the M-MDS.
• Run the vehicle under the FREEZE FRAME DATA stored condition.
• Is the same 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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10
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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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DTC troubleshooting completed.
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