P019A

2017-10-10

Description:

  • O2 Sensor Delayed Response Rich to Lean Bank 1 Sensor 3

Possible Symptoms:

  • Check the wiring and connections of Bank 1 Sensor 3 O2 sensor

  • Test and replace the Bank 1 Sensor 3 O2 sensor if faulty

  • Inspect and clean the mass air flow (MAF) sensor

  • Check for any exhaust leaks or damaged catalytic converter

Possible Causes:

  • Faulty or failing oxygen sensor in Bank 1 Sensor 3

  • Vacuum leak in the exhaust system

  • Fuel pressure regulator malfunction

  • Issues with the Engine Control Module (ECM) or sensor wiring

  • Exhaust system leaks or damage

Related Parts:

Possible Solutions:

  • Decreased fuel efficiency

  • Rough idle or engine misfires

  • Difficulty starting the vehicle

  • Increase in emissions/smoke from the exhaust

  • Loss of power or acceleration

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