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P2195 – O2 Sensor Signal Stuck Lean (Bank 1 Sensor 1)

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Symptoms

  • Rough idle
  • Hesitation
  • Poor acceleration
  • High fuel trims

Causes

  • Faulty O2 sensor
  • Vacuum leaks
  • Exhaust leaks
  • Fuel delivery issues

Diagnosis

  • Monitor O2 data
  • Check fuel trims
  • Inspect vacuum lines
  • Smoke test

Repair

  • Replace O2 sensor
  • Fix vacuum leaks
  • Repair exhaust leaks
  • Check fuel system
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