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What Does P2784 Code Mean?

    OBD-II Code P2784 is defined as a Input/Turbine Speed Sensor "A"/"B" Correlation

    The Input Speed Sensor tells the Transmission Control Module (TCM) how fast the engine is spinning so the correct gear can be engaged. When the TCM receives an inaccurate signal from this sensor, it can't properly shift the vehicle from gear to gear as the vehicle needs to change speed an rates of acceleration. Most vehicles use the crankshaft position sensor for this information. The engine control module (PCM) or TCM will set this code.

    P2784 Symptoms

    • Increased fuel consumption
    • Transmission may not shift properly

    Common Problems That Trigger the P2784 Code

    • Crankshaft Position Sensor (CKP) failure
    • Powertrain Control Module (PCM) failure
    • Transmission Control Module (TCM) failure
    • Wiring issue
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