Cruise Control Set Signal
Diagnostic trouble code P0568 indicates that the Powertrain Control Module (PCM) has detected an abnormal electrical signal from the cruise control 'Set' switch. The computer sets this code when the voltage received from the switch does not match the manufacturer's expected parameters when the button is pressed or released.
This code does not affect the vehicle's drivability or safety. It only disables the cruise control system, so it can be repaired at your convenience.
Common symptoms
- Cruise control system fails to engage or set a speed.
- Check Engine Light illuminates on the dashboard.
- Cruise control indicator light fails to turn on.
- Cruise control operates intermittently.
- Inability to adjust vehicle speed using the steering wheel buttons.
Likely causes
- Faulty cruise control multi-function switch or button.
- Failed or damaged clock spring in the steering column.
- Corroded, damaged, or loose wiring and connectors in the cruise control circuit.
- Blown fuse related to the cruise control system.
- Liquid spill damage on the steering wheel controls.
- Faulty Powertrain Control Module (PCM) or Body Control Module (BCM) (rare).
What to check before replacing parts
Check the cruise control system fuses.
Look for: A blown fuse indicates a short circuit that needs to be addressed before replacing the fuse.
Use a scan tool to monitor the cruise control switch data PID.
Look for: Watch the scan tool data while pressing the 'Set' button; if the state does not change from 'Off' to 'On', the switch or circuit is faulty.
Inspect the wiring and connectors near the steering column and cruise control switch.
Look for: Look for pinched wires, loose connections, or corrosion that could interrupt the signal.
Test the cruise control switch for proper resistance using a multimeter.
Look for: Compare the resistance values when the button is pressed and unpressed against the manufacturer's specifications; out-of-range values mean the switch is bad.
Test the steering wheel clock spring for continuity.
Look for: High resistance or an open circuit through the clock spring pins related to the cruise control indicates a broken clock spring ribbon.
This page explains the generic P0568 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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