Code Definition

P0724 — Torque Converter/Brake Switch B Circuit High

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

About P0724

P0724 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 P0724 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 P0724 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 P0724 code is set when the Engine Control Module (ECM) detects a high voltage condition in the circuit of the Torque Converter Clutch (TCC) / Brake Switch B. This switch is a key component in managing the interaction between the brake system and the torque converter clutch in the transmission. It signals the ECM when the brake is applied, impacting the operation of the torque converter clutch. A high circuit condition often points to an open circuit or a fault within the switch or its wiring. This can lead to improper disengagement or engagement of the torque converter clutch during brakin...

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