Diesel Particulate Filter Pressure Sensor A Circuit High
Common Symptoms
- Check Engine Light illuminated
- Reduced engine power or derate condition
- DPF regeneration cycles more frequent than normal
- Poor fuel economy
- Engine may enter limp mode under load
Most Likely Root Causes
- Shorted DPF differential pressure sensor
- Damaged or shorted wiring harness to DPF pressure sensor
- Corroded or damaged sensor connector
- Failed engine control module
- Contamination or moisture in sensor connector
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Component Location
DPF differential pressure sensor is typically mounted on or near the diesel particulate filter housing in the exhaust system.
Manufacturer Notes
Some diesel engines may require DPF pressure sensor relearn procedures after replacement or diagnostic testing is completed.
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