P0718 Code - Input/Turbine Speed Sensor Circuit Intermittent

Discussion in 'P - Powetrain Codes' started by fault code, Mar 18, 2018.

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    fault code Administrator Staff Member

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    What does P0718 Mean?

    OBD-II Code P0718 is defined as a Input/Turbine Speed Sensor "A" Circuit Intermittent

    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 and rates of acceleration. Most vehicles use the crankshaft position sensor for this information. The engine control module (PCM) or TCM will set P0718.

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    What are the common causes of P0718 ?
    • Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.
    • Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.
    • An air leak forward of the DPF will change the sensor readings resulting in the code


    How do you troubleshoot P0718 ?

    The engine system, in conjuction with the engine control module (ECM)/powertrain control module (PCM), activates the P0718 code solenoid valve to control oil pressure to the engine mechanism that is installed in the valve system to switch valve timing between Low and High.If the engine solenoid valve has an open or short circuit, a DTC is stored.

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