Faulty cruise control set switch or button.; Damaged or corroded wiring in the set signal circuit.; Poor electrical connection at the switch or module connector.; Failed clockspring (if the switch is mounted on the steering wheel).; Defective cruise control module or ECM.; Blown fuse or poor ground connection for the cruise control circuit.

DTC codes / P05xx · Vehicle speed, idle control and auxiliary inputs / P0568

P0568Cruise Control Set Signal

Q: What does code P0568 mean?

Cruise Control Set Signal. P0568 is a generic powertrain code that indicates the cruise control set signal circuit is outside the expected range or performance. The engine control module (ECM) or cruise control module monitors the voltage or signal from the set switch and detects an abnormal condition when the driver attempts to set a speed.

P0568 is a generic powertrain code that indicates the cruise control set signal circuit is outside the expected range or performance. The engine control module (ECM) or cruise control module monitors the voltage or signal from the set switch and detects an abnormal condition when the driver attempts to set a speed.

SystemPowertrain

Code typeGeneric (all makes)

SeverityLow

Fix difficultyIntermediate

AreaVehicle speed, idle control and auxiliary inputs

Symptoms you may notice

The cruise control warning light may illuminate on the dashboard.
The cruise control system may not engage when the set button is pressed.
The set button may require multiple presses to activate cruise control.
The cruise control may disengage unexpectedly while driving.
Often no symptoms besides the warning light, with cruise control still functioning normally.

Common causes, most likely first

Faulty cruise control set switch or button.
Damaged or corroded wiring in the set signal circuit.
Poor electrical connection at the switch or module connector.
Failed clockspring (if the switch is mounted on the steering wheel).
Defective cruise control module or ECM.
Blown fuse or poor ground connection for the cruise control circuit.

How to diagnose and fix it

Inspect the cruise control set switch for physical damage or sticking, and test its continuity with a multimeter.
Check the wiring harness and connectors between the switch and the cruise control module for corrosion, chafing, or loose pins.
Verify battery voltage and inspect fuses and grounds related to the cruise control system.
Use a scan tool to monitor live data for the cruise control set signal while pressing the button to confirm the signal is being received.
If the switch is steering-wheel-mounted, test the clockspring for continuity and replace if faulty.
Check for technical service bulletins (TSBs) or software updates for the cruise control module that may address signal interpretation issues.
If all else fails, substitute a known-good cruise control module or ECM to rule out internal failure.

Cruise Control Set Signal Pitfalls

A common misdiagnosis is replacing the cruise control module when the actual fault is a worn set switch or a broken wire in the steering column.
The code can set intermittently due to a marginal connection that only fails under certain temperatures or vibration, so wiggle-testing the harness is essential.
On many vehicles, the cruise control set signal is a multiplexed voltage on a single wire shared with other steering wheel buttons, so a fault in any button can affect the set signal.
Some systems require the brake pedal to be pressed and released before the set signal is accepted; a faulty brake pedal position sensor can mimic a set signal fault.
After repairs, the code may need to be cleared and the cruise control system may require a relearn procedure to restore normal operation.

Can I keep driving with P0568?

The vehicle remains safe to drive because the cruise control system is disabled, but you should avoid using cruise control until the fault is repaired. No immediate safety risk exists, but the warning light will remain on and cruise control will not function.

Tools that help

Tools we recommend are in the Auto Veteran shop on Amazon. As an Amazon Associate we earn from qualifying purchases.

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.