OBD-II code · Powertrain (generic)
P0585 Cruise Control Multi-Function Input A and B Correlation
Cruise control uses two redundant multiplexed inputs (A and B) for safety. The two inputs do not agree - one reports a button press the other does not, or both report incompatible levels at the same time.
Is it safe to drive with P0585?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyStalk module ageing - drift between A and B
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.6–2 h
- Emissions test
- Usually unaffected
- Parts involved
- Cruise Control Stalk, Cruise Input B Wiring
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.