Engine and gearbox (P)
P2002: DPF Efficiency Below Threshold
The diesel particulate filter (DPF) is not working efficiently, likely due to excessive soot build-up or a problem with the pressure sensor. This can affect engine performance and emissions.
Checked by a licensed car technician · last reviewed 29 September 2026
Symptoms
- Reduced engine power
- Increased fuel consumption
- Warning light on dashboard
- Unusual exhaust smoke
Common causes
- Blocked DPF
- Faulty pressure sensor
- Failed regeneration process
- Exhaust leaks
- Wiring issues
How to check it yourself
- Check DPF soot load and pressure readings
- Inspect pressure sensor and wiring
- Look for exhaust leaks
- Perform a forced regeneration if necessary
Can I keep driving?
The car can be driven, but prolonged use may lead to further issues. Address the problem soon to avoid damage.
General guidance, not a professional inspection. Confirm faults with measurements before buying parts, and use a qualified mechanic for brakes, steering, fuel leaks, airbags, and other safety-critical work. Terms and disclaimer