These are the following definitions for the codes you've received: P0864 - Transmission control module (TCM) communication circuit -range/performance problem P0070 (https://www.yourmechanic.com/article/p0070-obd-ii-trouble-code-ambient-air-temperature-sensor-circuit-by-jamahl-walker) - Ambient Air Temperature Sensor - (possibly shorted but most likely not related) P0734 - Gear 4 Incorrect...
