P0576 Cruise Control Input Circuit Low

P0576 points to a low condition in the cruise control input circuit. The controller sees cruise input voltage below the expected range.

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 multiple switches until the shared low-input circuit and clockspring path are tested.

Symptoms of P0576

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 P0576

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

Check cruise input voltage, switch states, shared reference circuit, brake input status, vehicle speed, and freeze-frame data.
Inspect for short-to-ground faults, open reference circuits, damaged clockspring wiring, switch contamination, connector corrosion, and column harness faults.
Operate each switch while monitoring live data to determine whether the low input affects one function or the shared input path.

Related OBD-II codes

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