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OBD II Fault Code

  • OBD II P014D

    OBD-II Code Decreased engine performance is defined as a O2 Sensor Slow Response - Lean to Rich

    The purpose of the oxygen sensor is to measure the oxygen content in the exhaust gases after they leave the combustion process of the engine. The engine control module (PCM) is constantly adjusting the amount of fuel delivered to the engine based off of the oxygen sensor's signal. If the PCM does not see the Oxygen sensor reading constantly changing with the fuel adjustment, it will set code P014D.

    Decreased engine performance Symptoms

    • Decreased engine performance
    • Increased fuel consumption

    Common Problems That Trigger the P014D Code

    • Oxygen sensor failure
    • Powertrain Control Module (PCM) failure
    • Wiring issue

    Common Repairs Needed for the P014D Code

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