Cruise Control Coast Signal
Diagnostic trouble code P0569 indicates a malfunction in the cruise control coast signal circuit. The powertrain control module (PCM) sets this code when it detects an abnormal voltage or resistance in the circuit responsible for the cruise control 'coast' or 'decelerate' function.
This code is not critical to the safe operation of the vehicle. It primarily affects the convenience of using the cruise control system and can be addressed at your earliest convenience.
Common symptoms
- Cruise control system is inoperative
- Cruise control 'coast' function does not work
- Check Engine Light is illuminated
- Cruise control light on the dash may flash or fail to illuminate
- Vehicle speed does not decrease when the coast button is pressed
Likely causes
- Faulty cruise control switch
- Damaged or corroded wiring in the cruise control circuit
- Loose or poor electrical connections at the cruise control switch
- Blown fuse related to the cruise control system
- Clock spring failure (if the switch is steering wheel mounted)
- Faulty Powertrain Control Module (PCM) (rare)
What to check before replacing parts
Check the cruise control system fuses.
Look for: A blown fuse indicates a potential short circuit or overload in the cruise control system that needs to be addressed.
Inspect the wiring and connectors associated with the cruise control switch.
Look for: Look for frayed wires, corrosion, or loose connections that could interrupt the coast signal to the PCM.
Test the cruise control switch using a multimeter.
Look for: Check for proper continuity and resistance values when the 'coast' button is pressed, according to the manufacturer's specifications.
Use a scan tool to monitor the cruise control switch inputs to the PCM.
Look for: Verify if the PCM registers a change in state when the coast button is activated; no change indicates a switch or circuit issue.
Test the clock spring (if applicable) for continuity.
Look for: High resistance or an open circuit through the clock spring while turning the steering wheel indicates a faulty clock spring.
This page explains the generic P0569 definition and is general reference information, not a diagnosis for your specific vehicle. Actual causes, severity, and repairs vary by make, model, engine, and mileage — always confirm with a scan tool and a qualified technician before replacing parts.
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