Code Definition

P0747 — Pressure Control Solenoid Stuck On

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

About P0747

P0747 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 P0747 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 fault code P0747 is set when the Transmission Control Module (TCM) detects that the pressure control solenoid 'A' is stuck in the 'on' position. This condition leads to a situation where the hydraulic pressure in the transmission is not regulated properly, as the solenoid remains constantly active. This can result in excessively high pressure within the transmission, potentially leading to harsh shifting, transmission slip, or damage to transmission components.

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