For Shop Owners

P242F - Diesel Particulate Filter Restriction Ash Accumulation

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3 What does this mean?

Possible causes

  • Diesel particulate filter is full of ash
  • Damaged diesel particulate filter pressure sensor
  • Faulty Exhaust Gas Temperature (EGT)
  • Exhaust Gas Temperature (EGT) harness is open or shorted
  • Exhaust Gas Temperature (EGT) circuit poor electrical connection
  • Faulty Mass Air Flow (MAF) / Intake Air Temperature (IAT) Sensor
What does this mean?

Possible symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P242F Description

The Powertrain Control Module (PCM) monitors the pressure decrease at the diesel particulate filter following a diesel particulate filter regeneration for a concern. The PCM calculates the amount of ash and the pressure increase the ash generates in the diesel particulate filter. During a regeneration the PCM expects the pressure to decrease. The amount of pressure decrease expected by the PCM is based on the temperature and flow of the exhaust gas. The test fails when the pressure reading at the diesel particulate filter pressure sensor does not decrease by the amount determined by the PCM.
OBDII Code P242f - Diesel Particulate Filter Restriction Ash Accumulation - itimaster.ru

P242F Information for specific makes

P242F FORD Diesel Particulate Filter Restriction Ash Accumulation

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P242F Comments

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Any information is appreciated. Thanks
Repair Importance Level: 3
1=Low 2=Medium 3=High
Repair Difficulty Level: 3
1=Easy 2=Moderate 3=Hard

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