Code Definition

P0572 — Cruise Control/Brake Switch A Circuit Low

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

About P0572

P0572 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 P0572 is stored, the module has detected a signal or supply voltage lower 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 P0572 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 P0572 fault code is set when the Engine Control Module (ECM) detects a lower than expected voltage or input signal in the circuit of the Brake Switch A, particularly in relation to the cruise control system. This brake switch is a critical component that signals the ECM to disengage the cruise control when the brake pedal is pressed, ensuring safe operation of the vehicle. A low signal in the brake switch circuit can indicate an electrical issue, such as a short to ground, a malfunctioning switch, or problems with the wiring or connectors. This condition can lead to the cruise control syst...

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