P2002 — Diesel Particulate Filter Efficiency Below Threshold (Bank 1)
Category: Powertrain Severity: Medium
Updated:
DTC code P2002 means: Diesel Particulate Filter Efficiency Below Threshold (Bank 1). It falls under the "Powertrain" category, with an estimated severity of Medium. Common causes include cracked or gutted particulate filter, faulty DPF differential pressure sensor and split or disconnected pressure sensor hoses; it's worth confirming the diagnosis before replacing parts.
Possible causes
- Cracked or gutted particulate filter
- Faulty DPF differential pressure sensor
- Split or disconnected pressure sensor hoses
- Exhaust leak before the DPF
Symptoms
- Check engine light
- Visible black smoke
- Possible limp mode
How to diagnose it step by step
- Check the differential pressure sensor hoses.
- Read differential pressure at idle and 2,500 rpm.
- Check for soot at the tailpipe.
- Look for exhaust leaks.
- Replace the sensor or DPF as indicated.
How to fix it
Check the differential pressure sensor hoses and the sensor itself first. If they're fine and soot comes out the tailpipe, the filter is damaged and must be replaced.
Estimated repair cost
Differential pressure sensor: $80–250. Particulate filter: $1,000–3,500.
Frequently asked questions
What does DTC code P2002 mean?
Diesel Particulate Filter Efficiency Below Threshold (Bank 1).
Is code P2002 serious?
Severity Medium. Not urgent, but worth diagnosing to avoid bigger damage.
Can I keep driving with code P2002?
Short-term driving is possible; the car will pollute beyond legal limits.
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