Code Definition

P0797 — Pressure Control Solenoid C Stuck On

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

About P0797

P0797 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 P0797 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 P0797 is set when the transmission control module (TCM) or the engine control module (ECM) in vehicles with integrated control systems detects that the pressure control solenoid 'C' is continuously in the 'on' position. This solenoid is responsible for controlling hydraulic pressure in the transmission, which is essential for the proper operation of gear shifts. When the solenoid is stuck in the 'on' position, it results in excessive hydraulic pressure, which can lead to various transmission problems such as harsh shifting, potential damage to internal transmission components, o...

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