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OBD II Fault Code

  • OBD II P2157

    OBD-II Code Engine may run rough is defined as a Fuel Injector Group "D" Supply Voltage Circuit High

    The engine computer (PCM) controls the signal to the fuel injectors in groups of two. If the PCM detects one or both of the fuel injectors in that group are not functioning properly, the PCM will set code P2157. The two injectors in that group will be disabled to prevent damage to additional components.

    Engine may run rough Symptoms

    • Engine may run rough

    Common Problems That Trigger the P2157 Code

    • Fuel injector failure
    • Powertrain Control Module (PCM) failure
    • Wiring issue
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