P0790

2017-10-10

Description:

  • The fault code P0790 indicates a malfunction in the circuit of the normal/performance switch. This fault code typically points to an issue with the electrical circuitry or connection associated with the normal/performance switch, which is responsible for selecting between normal and performance modes in the vehicle's transmission system.

Possible Symptoms:

  • Malfunction Indicator Lamp (MIL) or Check Engine Light illuminated

  • Inability to switch between normal and performance modes in the transmission

  • Unexpected or erratic behavior during gear shifts

  • Reduced performance or responsiveness in the transmission

  • Potential limited vehicle drivability in certain modes

Possible Causes:

  • Faulty normal/performance switch

  • Wiring or connection problems in the switch circuit

  • Loose or corroded connectors in the transmission system

  • Faulty transmission control module (TCM)

  • Electrical or wiring issues in the transmission system

Related Parts:

  • Transmission Shift Sensor: Gear Shift Sensor communicates the position the gear shifted to. Problems lead to difficulty in shifting gears

Possible Solutions:

  • Test and replace the faulty normal/performance switch, if necessary

  • Inspect and repair the switch circuit for any issues, such as damaged wires or connectors

  • Ensure the connectors in the transmission system are secure and free from corrosion

  • Test the transmission control module (TCM) for proper functionality and replace it if necessary

  • Inspect and repair any electrical or wiring issues in the transmission system

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