P0970 Code - Pressure Control Solenoid 'C' Control Circuit Low

Discussion in 'P - Powetrain Codes' started by fault code, Mar 31, 2018.

  1. fault code

    fault code Administrator Staff Member

    May 11, 2017
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    What does P0970 Mean?

    The Pressure Control (PC) Solenoid Valve an electronic pressure regulator that controls transmission line pressure based on current flow through its coil windings. As current flow is increased, the magnetic field produced by the coil moves the solenoid’s plunger further away from the exhaust port. Opening the exhaust port decreases the output fluid pressure regulated by the PC solenoid valve, which ultimately decreases line pressure. The line pressure solenoid valve regulates the oil pump discharge pressure to suit the driving condition in response to a signal sent from the Transmission Control Module (TCM).

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    What are the common causes of P0970 ?
    • An air leak forward of the DPF will change the sensor readings resulting in the code
    • Rusty exhaust systems, cracked exhaust manifolds or damaged or missing gaskets or donuts will cause air leaks.
    • Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)

    How do you troubleshoot P0970 ?

    Possible repairs for the P0970 code include:
    • Replacement of pressure control solenoids
    • Replacement of high pressure pumps
    • Replacement of electrical components
    • Replacement of dirty transmission fluid
    • Addition of transmission fluid
    • Hydraulic blockage removal
    • In rare cases, replacement of the PCM or the transmission control module

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