P2002 Diesel Particulate Filter Efficiency Below Threshold (Bank 1)

Powertrain Severity: Moderate Generic OBD-II

The diesel particulate filter is not trapping soot as expected.

Common causes

  • Cracked or removed DPF
  • Faulty differential pressure sensor
  • Leaking sensor pipes

Symptoms

  • Check engine light
  • Possible soot from tailpipe

What to check

  1. Check differential pressure readings
  2. Inspect sensor pipes
  3. Inspect the DPF

Manufacturers may add their own detail to generic codes. If your vehicle shows a different description for P2002, follow the service information for that make and model.