P2002 – Diesel Particulate Filter Efficiency Below Threshold (Bank 1)
Description
The diesel particulate filter on Bank 1 is not reducing soot as expected. This typically happens when the filter becomes clogged, regeneration fails, or the pressure sensor provides incorrect readings. The engine may enter limp mode and fuel consumption can increase.
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Compare Diagnostic ScannersSymptoms
- Reduced engine power
- Poor acceleration
- High fuel consumption
- Excess exhaust smoke
- Check engine light
Causes
- Clogged DPF
- Faulty DPF pressure sensor
- Failed regeneration cycle
- Exhaust leak before DPF
- Damaged pressure hoses
Diagnosis
- Check DPF pressure readings
- Inspect pressure sensor hoses
- Verify regeneration history
- Test for exhaust leaks
- Check soot load values
Repair
- Perform forced regeneration
- Clean or replace DPF
- Replace pressure sensor
- Repair exhaust leaks
- Inspect pressure hoses
