P0700 P0715 P0720 P1794 P1799 do u think this is the TCM unit?

Question

Car will not upshift and speedometer not working rite. I get 5 different codes. Not sure if its the TCM or not?

Answer 1

P0700 Transmission fault detected MIL light Requested on

P0715 Input turbine speed sensor circuit malfunciotn

P0720 Output speed sensor circuit malfunction

P1749 Pressure control solenoid failed low

P1799 Calculated oil temperature

How is  the condition of the transmission fluid. ? If this was the TCM unit of the shift solenoid pack you have certain solenoid circuit failure code pointing toward the  the TCM If this was the transmission relay control again there would be solenoid circuit failure codes. But what you have are speed sensor codes, if this tranmission was slipping you would have a speed sensor code and this would point to a internal mechanical condition within the transmission. In order for the speedometer to work the output speed sensor has to be in working condition. without a working output speed sensor the transmission would not shift properly. Take care of the output speed sensor , and retest.