P2096 Post Catalyst Fuel Trim System Too Lean (Bank 1)

Powertrain Severity: Moderate Generic OBD-II

The downstream oxygen sensor reports lean after the catalytic converter.

Common causes

  • Exhaust leak
  • Faulty downstream O2 sensor
  • Lean running

Symptoms

  • Check engine light

What to check

  1. Check for exhaust leaks
  2. Check upstream fuel trims
  3. Check downstream sensor

Manufacturers may add their own detail to generic codes. If your vehicle shows a different description for P2096, follow the service information for that make and model.

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