P2002
Get Serviced SoonFix: High — schedule within a weekDiesel Particulate Filter Efficiency Below Threshold (Bank 1) — DPF is clogged or not regenerating properly.
Dashboard light triggered
Diesel Particulate Filter (DPF)What to do
Drive at highway speed for 15–20 minutes to allow regeneration. If light is red or flashing, or car is in limp mode, get serviced immediately.
Common causes
- Clogged DPF (need regeneration or replacement)
- Failed DPF pressure sensor
- Short trips preventing regen
- Faulty EGR or injectors causing excess soot
Estimated repair cost
$500–$3,000
Exact cost depends on the cause, your vehicle, and labor rates in your area.
What to tell your mechanic
Use this script so you sound informed and get a clear diagnosis before agreeing to repairs:
“Code P2002, DPF efficiency. I've tried a highway run for regen. Can you check the DPF pressure sensors and force a regen if possible?”
About the Diesel Particulate Filter (DPF)
Code P2002 triggers the Diesel Particulate Filter (DPF). The diesel particulate filter is blocked or needs regeneration. Driving at highway speed for 15–20 minutes may allow passive regeneration. If ignored, the vehicle may enter limp mode.
Read full Diesel Particulate Filter (DPF) guideFrequently asked questions
- What does OBD code P2002 mean?
- Diesel Particulate Filter Efficiency Below Threshold (Bank 1) — DPF is clogged or not regenerating properly.
- What dashboard light does P2002 trigger?
- P2002 triggers the Diesel Particulate Filter (DPF).
- How serious is P2002?
- Severity: yellow. Fix priority: High — schedule within a week.
- How much does it cost to fix P2002?
- Repair costs typically range from $500–$3,000. The exact cost depends on the root cause and your vehicle.