Code Definition

P0971 — Pressure Control Solenoid C Control Circuit High

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

About P0971

P0971 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 P0971 is stored, the module has detected a signal or supply voltage higher than the expected operating range.

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 P0971 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 P0971 fault code is triggered when the control module detects a high voltage condition in the control circuit of Pressure Control Solenoid C. This solenoid is a key component in the automatic transmission system, playing a vital role in regulating hydraulic pressure for gear shifts and the operation of the torque converter clutch. A high voltage condition in this circuit usually points to an electrical fault, such as a short to power or an internal defect within the solenoid. High voltage can cause overactivation or malfunctioning of Pressure Control Solenoid C, leading to transmission iss...

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