Code Definition

P0748 — Pressure Control Solenoid Electrical

System: Powertrain  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About P0748

P0748 is a generic (obd-ii standard) powertrain diagnostic trouble code. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

Because P0748 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

The P0748 fault code is set when the Transmission Control Module (TCM) detects an electrical issue with the pressure control solenoid. This solenoid is responsible for controlling the hydraulic pressure in the transmission, which is crucial for shifting gears smoothly and efficiently. An electrical problem in this circuit can be due to a variety of reasons, including a malfunctioning solenoid, issues with the wiring, or problems within the TCM itself. The presence of this fault can lead to symptoms such as erratic shifting, slipping gears, or in some cases, the transmission failing to shift al...

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