P0569 Cruise Control Coast Signal Malfunction

P0569 indicates a cruise control coast signal malfunction. The controller is not receiving a valid coast request from the cruise switch input circuit.

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 speed control output components before confirming the coast input circuit is correct.

Symptoms of P0569

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 P0569

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 coast switch state, set and resume inputs, brake switch data, vehicle speed, cruise enable status, and freeze-frame conditions.
Inspect steering wheel switch contacts, clockspring wiring, column connectors, shared resistor circuits, corrosion, and liquid intrusion.
Operate the coast control while watching live data to confirm the request changes cleanly and is not stuck or missing.

Related OBD-II codes

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