It is a 2015 Chevrolet Malibu. While driving, it suddenly felt like it went into Neutral. The engine was running, but it would not continue changing gears or pulling normally. Before this, it intermittently went into Reduced Engine Power mode, and restarting the car after a minute or two temporarily cleared it. Please do a complete scan of the ECM, TCM, BCM, and ABS modules; inspect transmission-fluid condition and level using the GM procedure; check for leaks; and test battery voltage, charging voltage, grounds, transmission wiring, and TCM communication before recommending a transmission replacement.

Transmission not shifting has ODB CODE P0700