P0568: Fault in the Set signal from the cruise control master switch
Cruise control set signal malfunction
Severity: Monitor
This is a cruise control input fault; the car still drives and brakes normally, only cruise control is likely to be affected.
P0568 in short
P0568 means the computer sees a problem with the Set signal from the cruise control master switch. Wiring, the switch itself or, less often, the engine computer are the listed causes. It is generally safe to drive without cruise control, but have the switch circuit checked.
The cruise control master switch sends separate signals to the computer for set, resume and coast. P0568 sets when the set signal is wrong or missing.
TroubleCodes.net lists wiring, the cruise control switch and the engine computer as the probable causes, and recommends a scan tool that can run bidirectional tests to find which part failed rather than relying on the code alone.
Most likely causes
These are general causes for this code across vehicles. None is specific to one make or model.
Cause 1: Damaged wiring or connector in the switch circuit
Common general cause- Why it ranks here
- Wiring is the first cause TroubleCodes.net lists.
- What would change this
- Rises if the connector is corroded or a wire is chafed. Falls if wiring tests good.
Cause 2: Faulty cruise control master switch
Common general cause- Why it ranks here
- The switch produces the signal, and TroubleCodes.net lists it as a probable cause.
- What would change this
- Rises if the signal is wrong at the switch with good wiring. Falls if the switch signal is normal.
Cause 3: Engine control module fault
Possible — needs testing- Why it ranks here
- Listed last by TroubleCodes.net; rule out wiring and the switch first.
- What would change this
- Rises only after the switch and wiring test good. Falls if either is faulty.
What to test first
Start at step 1. Each result tells you what it means and where to go next.
Step 1: Check whether cruise control works, and inspect the master switch connector and wiring for damage or corrosion.
IfDamage or corrosion is visible
It meansRepair the wiring or connector.
Points to: Damaged wiring or connector in the switch circuit
IfEverything looks fine
It meansTest the switch signal.
Step 2: With a scan tool that reads cruise switch status, press each cruise button and watch whether the matching signal changes.
Warning:Do this parked with the parking brake set; switches sit near the steering wheel airbag, so do not probe or disassemble the wheel without disabling the airbag system.
IfThe signal does not change with the button pressed
It meansThe switch or its wiring is suspect.
IfThe signal changes normally
It meansHave the computer checked for a fault.
Symptoms
- Cruise control does not work or the button does nothing
- Check engine light on
How to fix
Step 1: With the car off, look over the visible master switch connector and wiring for damage.
Parts and cost context
- Engine control module (ECM / PCM):Rule out the switch and wiring first. Labour varies; get a quote.
Labor varies by vehicle and shop; get a quote before you approve a repair.
Compare used part prices on PartPriceGuideOn your vehicle
We don't have reviewed vehicle-specific evidence for P0568 yet. The causes and tests above apply across vehicles.
Related codes
Sources and review
- Last reviewed
- Written by
- Saurabh K.
- Editorial review
- Pending
- Technician review
- Technician review pending
This page explains what a code usually means; it is not a substitute for a professional inspection. How we source and review · Report an error