Code Definition

P0746 — Pressure Control Solenoid Performance or Stuck Off

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

About P0746

P0746 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.

When P0746 is stored, the module has detected a plausibility fault — the measured value is in the electrical range but is not consistent with expected operating behaviour.

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 P0746 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 P0746 is set when the Transmission Control Module (TCM) detects an issue with the performance of the pressure control solenoid 'A'. This code indicates that the solenoid is either performing below expectations or is stuck in the off position. As a result, the solenoid may not be able to appropriately regulate the hydraulic pressure in the transmission, leading to issues such as erratic shifting, slipping, or even failure to shift.

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