My truck doesn't have any power and my overdrive light on
My car has an automatic transmission.
The transmission control module (TCM) helps regulate fuel efficiency and power while storing information about the transmission system in its memory. A faulty transmission control module may cause a delay in acceleration or erratic shifting of gears.
The transmission control module has various sensors such as vehicle speed sensors, wheel speed sensors, throttle position sensors, turbine speed sensor, and transmission fluid temperature sensors that all direct information to it in order for it to perform it’s function.
The TCM also controls the overdrive function of your truck's transmission. Any of these may also affect the way the transmission control module performs and controls the transmission and the shifting of your truck.
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