P2000 – NOx Trap Efficiency Below Threshold

Description

NOx trap efficiency is below acceptable limits.

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Symptoms

  • Check engine light
  • Poor emissions

Causes

  • Catalyst degradation
  • Exhaust leak
  • Sensor failure

Diagnosis

  • Inspect exhaust
  • Read O2/NOx data
  • Check sensors

Repair

  • Replace NOx trap
  • Repair exhaust leak
  • Replace sensor