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Our automotive experts have put together the following information about the P048A 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 P048A code.

OBD II Fault Code

  • OBD II P048A

    OBD-II Code Powertrain Control Module (PCM) failure is defined as a Exhaust Pressure Control Valve "A" Stuck Closed

    The Exhaust Pressure Control Valve controls exhaust back pressure during engine warmup. If the engine control module (PCM) determines there is an incorrect signal from the Exhaust Pressure Control Valve, the PCM will set code P048A.

    Common Problems That Trigger the P048A Code

    • Exhaust pressure control valve failure
    • Powertrain Control Module (PCM) failure
    • Wiring issue
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