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OBD II Fault Code

  • OBD II P0490

    OBD-II Code Powertrain Control Module (PCM) failure is defined as a Exhaust Gas Recirculation "A" Control Circuit High

    EGR (Exhaust Gas Recirculation) systems are used to reduce the combustion temperature, thus reducing emissions. If the engine control module (PCM) does not detect the amount of flow requested from the EGR, it will set code P0490.

    Common Problems That Trigger the P0490 Code

    • EGR valve failure
    • Powertrain Control Module (PCM) failure
    • Wiring issue

    Common Repairs Needed for the P0490 Code

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