P0580

Cruise Control Multi-Function Input A Circuit Low

Q: Is it safe to drive with P0580?

Yes. Only cruise control is affected — the engine, brakes, and steering all work normally.

Q: Can I just clear P0580?

It will return until the low circuit fault is fixed, and cruise control won't work reliably in the meantime.

Cruise / speed control Generic OBD-II Low

What it means

P0580 means the cruise control multi-function input 'A' circuit is reading lower than expected, usually from a short to ground or a failing switch. Cruise control may work erratically or not at all. It's a convenience-system fault that doesn't affect normal engine operation or your ability to drive the car.

Low

Can I keep driving? Fine to drive — only cruise control is affected; the engine and normal driving are unchanged.

Real-world scan data

Seen in

scans in the past year

Found in

<0.1%

of scans

<0.1%

of scans that found faults

Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.

Common symptoms

What you'll notice

Cruise control malfunctioning or completely non-functional
Cruise control indicator light on
Unable to set or hold a speed
Check-engine light on (on some vehicles)

Common causes

Most likely first

Malfunctioning cruise control switchLikely
Damaged or corroded wiring or connections shorting the circuit lowCommon
Failed brake light switch (shared input on some systems)Common
Failed cruise control moduleLess often

How to diagnose & fix

Work through it in order

Inspect the cruise control switch wiring and connectors for a short to ground or corrosion.
Test the multi-function switch and replace it if the 'A' input reads low or stuck.
Check the brake light switch operation, since it feeds the cruise control on many vehicles.
If wiring, switch, and brake switch are good, replace the cruise control module. Clear and re-test.

FAQ

Quick answers

Is it safe to drive with P0580?+

Yes. Only cruise control is affected — the engine, brakes, and steering all work normally.

Can I just clear P0580?+

It will return until the low circuit fault is fixed, and cruise control won't work reliably in the meantime.

Read & clear P0580 yourself

Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.

▶ Get it on Google Play

✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX