P0575 Cruise Control Input Circuit

P0575 indicates a general cruise control input circuit problem. The controller sees an invalid signal from one or more cruise switch inputs.

Code details

Generic OBD-II · P0

System: Speed / Idle
Code type: Generic (SAE / ISO controlled)
Standard: SAE J2012 / ISO 15031-6

Diagnostic boundary

A diagnostic trouble code reports that a monitored test failed. It does not prove one specific part is bad, and manufacturer logic can add vehicle-specific conditions.

Do not replace the cruise actuator before identifying the specific input circuit that is invalid.

Symptoms of P0575

Unstable, high, or low idle, or stalling.
Erratic speedometer, cruise-control, or shift behaviour.
Check-engine light with a hesitation or surge.

Common causes of P0575

A dirty throttle body, idle-control valve, or throttle-position sensor.
A failing vehicle-speed or wheel-speed sensor, or its wiring.
Vacuum leaks or a related sensor forcing the idle/speed strategy.

Useful checks before replacing parts

Compare all cruise switch states, brake and clutch inputs, vehicle speed, cruise enable status, steering wheel control data, and freeze-frame conditions.
Inspect clockspring wiring, switch contacts, shared resistor ladder circuits, connector corrosion, column harness damage, and module communication.
Operate each cruise control input while watching live data to identify which request is missing, stuck, or implausible.

Related OBD-II codes

These nearby speed / idle entries can help compare wording and pin down the fault area.