Code Definition

P0573 — Cruise Control/Brake Switch A Circuit High

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

About P0573

P0573 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 P0573 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 P0573 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 P0573 fault code is set when the Engine Control Module (ECM) detects a higher than expected voltage or input signal in the circuit of the Brake Switch A, particularly in its relation to the cruise control system. This brake switch is a vital component that informs the ECM to disengage the cruise control when the brake pedal is pressed. A high signal in the brake switch circuit can indicate an electrical issue such as a short to power, a malfunctioning switch, or problems with the wiring or connectors. This condition can cause the cruise control system to not disengage properly when the bra...

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