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Our automotive experts have put together the following information about the P0159 diagnostic trouble code. We've provided the common symptoms that occur when this code is set along with the frequent repairs that address the issues related to the P0159 code.

What Does P0159 Code Mean?

    OBD-II Code P0159 is defined as a O2 Sensor Circuit Slow Response

    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. This information is critical to the PCM's ability to maintain efficient fuel economy. When the PCM detects a failure of the sensor or the information received from the sensor, it will set code P0159.

    P0159 Symptoms

    • Decreased engine performance
    • Increased fuel consumption

    Common Problems That Trigger the P0159 Code

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

    Common Repairs Needed for the P0159 Code

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