Diesel Particulate Filter Restriction Ash Accumulation
Table of contents
P242F FORD 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
How do I fix code P242F FORD?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Cost of diagnosing the P242F FORD code
The cost of diagnosing the P242F FORD code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P242F FORD 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.