P codes related to the tranny

I just got my car back from ZZperformance and after spending too much money upgrading and repairing, i took if off the car and it is only running in 3rd gear unless i shift it manually. it has codes and they are P0753, p0758, and p1860, they should be fixing it but they are miles away and i need help now, they'll have to worry about me reversing the charges later. what needs to be replaced and how much labor will be involved. oh and theres only 44,000 miles on the car as it is.

I just got my car back from ZZperformance and after spending too much money upgrading and repairing, i took if off the car and it is only running in 3rd gear unless i shift it manually. it has codes and they are P0753, p0758, and p1860, they should be fixing it but they are miles away and i need help now, they'll have to worry about me reversing the charges later. what needs to be replaced and how much labor will be involved. oh and theres only 44,000 miles on the car as it is.

P0753 and P0758 are both Shift Solenoid codes. a P1860 is a TCC error code. i would check the shift Solenoid for power. it may need to be replaced.

Welcome to AF.

What year and model Grand Prix is this?

Check the transaxle umbilical electrical connector. Remove and reseat. What is common to all three DTCs and the 1-2 shift, 2-3 shift and TCC-PWM solenoids is the 12 volts or lack of which comes from the TCC fuse at the engine compartment fuse box so check that to make sure it is not blown.