Check the 'Possible Causes' listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
The cost to diagnose the P0790 code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.
The Transmission Control Module (TCM) monitors the Normal/Performance Switch signal. The TCM sets the OBDII code when the Normal/Performance Switch is not to factory specifications.
Need more information on how to fix the P0790 code? Get Access to Factory Service Manuals
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