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Our automotive experts have put together the following information about the P0312 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 P0312 code.

What Does P0312 Code Mean?

    OBD-II Code P0312 is defined as a Cylinder 12 Misfire Detected

    When the engine control module (PCM) detects that cylinder 12 is not sufficiently contributing to keeping the engine running properly, it will set code P0312.

    P0312 Symptoms

    • Decreased engine performance
    • Increased fuel consumption

    Common Problems That Trigger the P0312 Code

    • Damaged or contaminated spark plug
    • Engine sensor failure
    • Exhaust leak
    • Fuel injector failure
    • Fuel pump failure
    • Ignition coil failure
    • Internal engine failure
    • Powertrain Control Module (PCM) software needs to be updated
    • The fuel does not meet the manufacturer's requirements
    • Vacuum leak

    Common Repairs Needed for the P0312 Code

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