I drive my truck and my overdrive light
comes on an my truck down shift into low
gear without me hitting the button.how do i
Overdrive off light coming on without activating it from the switch means the transmission is overheating and there are fault codes stored in the system. Have a garage hook the car up to their scanned to pull the codes. Could be a trans solenoid to needing a rebuild. Hard to say without the codes.
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