OBD-II code · Powertrain (generic, extended)
P2002 Diesel Particulate Filter Efficiency Below Threshold (Bank 1)
Diesel Particulate Filter Efficiency Below Threshold (Bank 1): the control module has detected this fault condition.
Is it safe to drive with P2002?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyDPF heavily loaded — repeated short trips prevent regeneration
- PossibleFilter substrate cracked or melted from runaway regeneration
- PossibleDifferential pressure sensor drift
- Less likelyLeak around DPF housing
Symptoms
- Check engine light or DPF warning light on
- Power loss / limp mode
- Increased fuel consumption
- Failed forced regeneration attempts
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 2–8 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Diesel Particulate Filter, Dpf Differential Pressure Sensor, Dpf Temperature Sensor
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.