[amidgeha]

Transmission Fluid Pressure Sensor/Switch © Circuit

The Powertrain Control Module (PCM) uses three pressure switches to monitor the fluid pressure in the LR, 2/4, and OD clutch circuits. The pressure switches are continuously monitored for the correct states in each gear.

Cause:
OD Pressure Switch harness is open or shorted
OD Pressure Switch circuit poor electrical connection
Faulty OD Pressure Switch
Internal transmission damage
Faulty Powertrain Control Module (PCM)
Faulty Transmission Control Module (TCM)

Symptoms:
Check engine light
Transmission will not shift gears.