"Service Bulletin - When the PCM detects a malfunction in one of the odd number transmission gears, it will set one of the following DTCs:
-P073F (unable to engage gear 1)
-P074B (unable to engage gear 3)
-P074D (unable to engage gear 5)
-P074F (unable to engage gear 7)
Due to inappropriate calibration of the PCM, the OBD system cannot properly clear the transmission permanent DTC as required."
