Our automotive experts have put together the following information about the P2156 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 P2156 code.

What Does P2156 Code Mean?

    OBD-II Code P2156 is defined as a Fuel Injector Group "D" Supply Voltage Circuit Low

    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 P2156. The two injectors in that group will be disabled to prevent damage to additional components.

    P2156 Symptoms

    • Engine may run rough

    Common Problems That Trigger the P2156 Code

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