2000 c230 wont shift out of first

Question

started with pulling codes p0753, p0758, p0763, p0743, and p0715. i replaced the conductor plate the electrical plug bushing the transmission filter and fluid and pan gasket. filled with new fluid and cleared the codes with an odn2 scanner. started car and the same 5 codes came back. still in limp mode, any ideas? oh yeah, i do have a small amount of oil wicking to the tcu but plugs dont look wet so i am guessing the tcu is good

Answer 1

P0753 shift solenoid valve 1-2 / 4-5

P0758 shift solenoid valve 2-3

P0763 Shift solenoid valve 3-4

P0743 PWM solenoid valve (Torque convertor lock up)

P0715 Voltage supply to RPM sensor

When these code appear you stay in first gear this is limp mode.The main code that caused these code to appear is P0715 when the RPM sensor are faulty the transmission goes into electrical limp mode . If the conductor plate has already been replaced, the RPM sensor can cause this problem especially when the voltage is not supplied to the RPM sensor  this can be from the TCM (transmission control module) not supplying power to the transmission relay.