P0575 indicates the powertrain control module has detected an electrical fault in the cruise control input circuit. This circuit includes the cruise control switches, associated wiring, and the signals they send to request cruise activation, set, resume, or cancel functions.
The steering wheel-mounted cruise control switches are the most common failure point due to frequent use, internal contact wear, or liquid contamination.
Chafed, corroded, or broken wires and loose or corroded connectors between the switch assembly and the control module can cause open or short circuits.
A stuck or misadjusted brake switch can send an incorrect cancel signal, preventing cruise engagement or causing the module to log a circuit fault.
The rotating electrical contact that connects steering wheel switches to the vehicle harness can develop open circuits on the cruise control lines.
An internal driver or input circuit failure in the PCM is possible but rare; it should be considered only after all external circuit and component tests pass.
Yes, the vehicle will operate normally; only the cruise control system will be disabled or unreliable.
Almost never. The PCM is the least likely cause. Thoroughly test the switches, clockspring, brake switch, and wiring before considering module replacement.
It can. Many systems use the brake pedal position switch as a cruise cancel input; a faulty or misadjusted switch may set this code.
On vehicles with steering wheel-mounted cruise switches, the clockspring is a frequent failure point; on column-stalk systems it is not involved.