DTC P242F [MZ-CD 1.6 (Y6) (EURO4 emission level)]
id0102g6841300
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DTC P242F |
Diesel particulate filter restriction - ash accumulation |
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DETECTION CONDITION
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• The PCM monitors the exhaust gas pressure before and after the diesel particulate filter, using the diesel particulate filter differential sensor. If the differential pressure exceeds the threshold calculated from the exhaust gas flow for a continuous 7 s, the PCM determines that the diesel particulate filter is restricted by ash.
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POSSIBLE CAUSE
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• Scheduled maintenance does not have followed
• Loose or poor installation particulate filter differential pressure sensor downstream side
• Particulate differential pressure sensor malfunction
• Exhaust gas leakage after diesel particulate filter
• Air leakage from intake-air system
• MAF sensor malfunction
• Base engine malfunction
• EGR system malfunction
• EGR throttle valve malfunction
• Diesel particulate filter restriction and/or damaged
• 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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VERIFY VEHICLE SCHEDULED MAINTENANCE
• Verify vehicle has followed engine related scheduled maintenance items.
• Does the vehicle have followed engine related items?
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Yes
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Go to the next step.
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No
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Followed the scheduled maintenance, then go to the next step.
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5
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INSPECT DIESEL PARTICULATE FILTER DIFFERENTIAL PRESSURE SENSOR PIPING
• Inspect for connection and condition at diesel particulate filter differential pressure sensor side piping.
• Is there any clacked damaged and/or misconnection found?
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Yes
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Repair or replace the malfunctioning part according to the inspection results, then go to Step 14.
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No
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Go to the next step.
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6
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INSPECT EXHAUST GAS LEAKAGE
• Inspect the exhaust system for leakage at diesel particulate filter downstream side.
• Is there any leakage found diesel particulate filter downstream side?
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Yes
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Repair or replace malfunctioning part, then go to Step 14.
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No
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Go to the next step.
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7
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INSPECT AIR LEAKAGE FOR INTAKE-AIR SYSTEM
• Inspect the intake-air system for air leakage.
• Is there any air leakage?
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Yes
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Repair or replace malfunctioning part, then go to Step 14.
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No
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Go to the next step.
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8
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VERIFY WHETHER MALFUNCTION IS MAF SENSOR SIGNAL OR ELSEWHERE
• Access the PCM PID MAF using the M-MDS.
• Does the MAF PID indicate normal?
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Yes
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Go to the Step 10.
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No
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Go to the next step.
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9
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VISUALLY INSPECT MAF SENSOR
• Remove the MAF/IAT sensor.
• Visually inspect the MAF sensor.
• Is there any contamination detected?
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Yes
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Clean the MAF/IAT sensor and install properly, then go to Step.
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No
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Replace the MAF/IAT sensor, then go to Step 14.
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10
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INSPECT ENGINE COMPRESSION
• Inspect the engine compression for all cylinders.
• Is there any malfunction?
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Yes
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Overhaul the engine for repairs, then go to Step 14.
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No
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Go to the next step.
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11
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VISUALLY INSPECT EGR THROTTLE VALVE
• Remove the EGR throttle valve.
• Visually inspect the EGR throttle valve for follows;
• Is there any malfunction?
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Yes
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Clean or replace the EGR shutter valve as necessary, then go to Step 14.
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No
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Go to the next step.
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12
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VISUALLY INSPECT EGR VALVE
• Remove the EGR valve.
• Visually inspect the EGR valve for follows;
• Is there any malfunction?
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Yes
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Clean or replace the EGR valve as necessary, then go to Step 14.
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No
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Go to the next step.
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13
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VISUALLY INSPECT DIESEL PARTICULATE FILTER FOR RESTRICT AND DAMAGE
• Cool down the engine.
• Remove the catalytic converter.
• Visually inspect the diesel particulate filter.
• Is there any restrict or damage?
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Yes
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Replace the catalytic converter, then go to the next step.
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No
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Go to the next step.
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14
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VERIFY THAT DTC P242F 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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15
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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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