DTC P2459 [MZ-CD 1.6 (Y6) (EURO4 emission level)]
id0102g6841800
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DTC P2459 |
Diesel particulate filter regeneration frequency |
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DETECTION CONDITION
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If the diesel particulate filter regeneration frequency reaches the specified frequency as calculated from the engine operation condition for engine protection, the PCM determines that the diesel particulate filter regeneration frequency is too short.
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POSSIBLE CAUSE
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• Scheduled maintenance does not have followed
• Diesel particulate filter differential pressure sensor improper connection
• Exhaust gas leakage in exhaust system after diesel particulate filter
• Low engine compression
• Diesel particulate filter restriction or damaged
• Fuel injection system malfunction
• 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 10.
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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 10.
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No
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Go to the next step.
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7
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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 10.
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No
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Go to the next step.
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8
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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 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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INSPECT FUEL INJECTOR FOR STUCK OPEN
• Remove the all fuel injector.
• Is there any stuck open?
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Yes
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Replace the suspect fuel injector, then 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 THAT DTC P2459 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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11
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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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