Code Definition

P0798 — Pressure Control Solenoid C electrical malfunction

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

About P0798

P0798 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 P0798 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 P0798 is set when the transmission control module (TCM) or the engine control module (ECM) in vehicles with integrated control systems detects an electrical malfunction in the pressure control solenoid 'C'. This solenoid is a key component in managing hydraulic pressure within the transmission system, which is crucial for accurate gear engagement and shifting. An electrical malfunction in this case could be related to issues with the solenoid’s circuitry, such as wiring faults, connector damage, or a problem within the solenoid itself. Such a malfunction can lead to transmissi...

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