Whats wrong

Question

All dash lights came on TCS Brakes etc. Transmission shifting very hard. Doesn't seem to be getting out of 4th gear

Answer 1

P1212 TCS communication line

P0500 Vehicle speed sensor

U1000 CAN communication line

U1001 Can communication line

As long as there is a "U" code those are diagnosed first, what happens is the ABS system is not communicating with ECM , either due to the ABS module or harness connection of the ABS module.