P0748

Test 1:

Test 2 - 5:

Test 6 - 9:

Test 10 - 13:

SYMPTOM
P0748-PRESSURE SOL CONTROL/TRANS RELAY CIRCUITS

WHEN MONITORED
Continuously with the key on

SET CONDITION
This code will set if the voltage detected on the Governor Pressure Solenoid Control circuit at the PCM is different than the expected voltage.

POSSIBLE CAUSES
- Fused B+ circuit open
- Governor pressure solenoid control circuit open
- Transmission control relay output circuit open
- Governor pressure solenoid control circuit short to ground
- Transmission relay output circuit short to ground
- Governor pressure solenoid control circuit short to voltage
- Governor pressure solenoid control circuit short to other circuits
- Governor Pressure Solenoid
- Transmission control relay - poor contacts
- Intermittent wiring and connectors
- Powertrain control module