P0471 Exhaust Pressure Sensor Range/Performance

Powertrain Severity: Moderate Generic OBD-II

The exhaust pressure sensor reading does not make sense.

Common causes

  • Blocked sensor pipe
  • Faulty sensor
  • Diesel particulate filter problem

Symptoms

  • Check engine light
  • DPF warning
  • Reduced power

What to check

  1. Inspect sensor pipes
  2. Compare reading key-on engine-off
  3. Check DPF status

Manufacturers may add their own detail to generic codes. If your vehicle shows a different description for P0471, follow the service information for that make and model.