Diesel Particulate Filter Pressure Sensor Circuit Low
Voltage on the DPF differential-pressure sensor signal line is below the lower threshold. Typically a short to ground or an open in the supply line.
Affected components
- Dpf differential pressure sensor
- Dpf pressure sensor wiring
Common causes
- High likelihood: Signal wire shorted to ground
- Medium likelihood: Reference voltage line open
- Low likelihood: Connector pins corroded - high contact resistance
Possible symptoms
- Check engine light or DPF warning light on
- Power loss / limp mode
- Increased fuel consumption
- Failed forced regeneration attempts
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- A drive cycle may be required after repair
Related codes
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.