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P0998 - OBD II Trouble Code

Our automotive experts have put together the following information about the P0998 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 P0998 code.

OBD II Fault Code

  • OBD II P0998

    OBD-II Code Transmission may not shift properly is defined as a Shift Solenoid "F" Control Circuit Low

    The Transmission Fluid Pressure Solenoid allows the engine's control module (PCM) or Transmission Control Module (TCM) to use hydraulic fluid to engage the clutches in the transmission to allow for smoother shifting while driving. If the PCM or TCM detects an issue with the electrical circuit to or from this solenoid, the PCM or TCM will set code P0998.

    Transmission may not shift properly Symptoms

    • Increased fuel consumption
    • Transmission may not shift properly

    Common Problems That Trigger the P0998 Code

    • Transmission Control Module (TCM) failure
    • Transmission fluid level is low
    • Transmission shift solenoid failure
    • Wiring issue

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