Diesel Particulate Filter Pressure Sensor A Circuit Range/Performance
Common Symptoms
- Check engine light illuminated
- Reduced engine power or derate
- Poor fuel economy
- Excessive black smoke from exhaust
- DPF regeneration cycles more frequently than normal
- Limp mode activation
Most Likely Root Causes
- Faulty DPF differential pressure sensor
- Clogged or restricted DPF pressure sensor hoses
- Damaged or corroded wiring to DPF pressure sensor
- Contaminated or failed DPF pressure sensor
- Clogged DPF causing abnormal pressure readings
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Component Location
DPF differential pressure sensor is typically mounted on the engine or frame rail with hoses connected to the DPF inlet and outlet.
Manufacturer Notes
Some diesel engines require specific DPF sensor hose routing to prevent false codes due to exhaust heat or moisture accumulation.
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