P0586
Cruise Control Vent Control Circuit Open
The vent solenoid of a vacuum-driven cruise servo - which releases vacuum to drop throttle - has an open control circuit. The servo cannot release vacuum, so cruise speed cannot be reduced.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Open in solenoid or harnessCommon
- Pin pushed back out of connector bodyLess likely
- Cracked solder joint inside the module or sensorLess likely
Parts involved
- Cruise Vent Solenoid
P0586 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.