What are the common causes of P0748?

An open in the pressure control solenoid A wiring. A short to ground or power. Corrosion at the solenoid A connector. A failed solenoid A coil. A TCM driver fault.

Test the solenoid A circuit for continuity. Check the circuit for a short to ground. Measure the solenoid A resistance. Inspect the connector for corrosion. Replace the solenoid if the coil is off spec. Clear the code and retest.

P0748

Pressure Control Solenoid A Electrical

System: Transmission (P code)
Lamp: Check Engine Light
Category: Powertrain - Transmission

What it means

P0748 means Pressure Control Solenoid A Electrical.

Where it lives

For P0748, start at the solenoid the description names.

Check these first

An open in the pressure control solenoid A wiring
A short to ground or power
Corrosion at the solenoid A connector
A failed solenoid A coil
A TCM driver fault

What to do next

Test the solenoid A circuit for continuity
Check the circuit for a short to ground
Measure the solenoid A resistance
Inspect the connector for corrosion
Replace the solenoid if the coil is off spec
Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.