P0564
Cruise Control Multi-Function Input A Circuit
Vehicle speed & idle control
Generic OBD-II
Low
What it means
P0564 means the module saw an out-of-range signal on the "A" input of the cruise control multi-function switch — the buttons you press to set, resume, or cancel cruise. It's a comfort-feature fault: cruise control may not work, but the engine and drivability are unaffected. The usual cause is the switch itself or its wiring.
Low
Can I keep driving? Safe to drive — only the cruise control is affected; the engine runs and drives normally.
Common symptoms
What you'll notice
- Cruise control inoperative or erratic
- Cannot set or maintain a cruise speed
- Check-engine light on
Common causes
Most likely first
- Faulty cruise control multi-function switchLikely
- Damaged wiring or connector in the switch circuitCommon
- Worn clockspring in the steering wheel (if switches are wheel-mounted)Common
- Failed cruise control / body control moduleLess often
How to diagnose & fix
Work through it in order
- Read freeze-frame, then test the cruise control switch inputs for the expected voltage steps at each button.
- Inspect the switch wiring and connectors, including the steering-wheel clockspring, for opens or shorts.
- Replace the multi-function switch if its resistance/voltage steps are out of spec.
- If the switch and wiring are good, suspect the control module. Clear and re-test.
FAQ
Quick answers
Is it safe to drive with P0564?+
Yes. Only the cruise control is affected — the engine and brakes work normally. You just won't be able to rely on cruise until it's fixed.
Can I just clear P0564?+
You can, but it returns the next time the module reads the faulty switch input. Repair the switch or wiring first.
Related codes
Often seen with P0564
Read & clear P0564 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX