Code P0586 indicates the powertrain control module (PCM) has detected an open circuit in the cruise control vent control solenoid circuit. This solenoid is part of the vacuum-operated cruise control servo and is responsible for venting vacuum to release or modulate throttle hold. An open means the PCM cannot complete the electrical path to that solenoid.
The cruise control vent solenoid inside the servo assembly can develop an internal open coil over time, breaking the electrical circuit the PCM expects to see.
Chafed, broken, or rodent-damaged wiring between the PCM and the cruise servo can create an open in the vent control circuit.
The connector at the cruise control servo or an intermediate junction can have pushed-out pins, corrosion, or poor contact that reads as an open circuit.
A blown fuse supplying the cruise control solenoids can cause an open-circuit condition on the vent control line, though this may also set related cruise codes.
An internal open in the PCM's solenoid driver circuit is possible but uncommon and should only be considered after all wiring, connectors, and the solenoid are verified good.
Yes. This code only affects the cruise control system. Normal driving, engine performance, and safety systems are unaffected, though cruise control will likely not function until the issue is repaired.
Almost never. The vast majority of P0586 cases are caused by a failed vent solenoid, damaged wiring, or a connector problem. PCM driver failure is rare and should only be suspected after every other component in the circuit has been definitively ruled out through proper testing.
On many vehicles the vent solenoid is integrated into the cruise control servo assembly and is not serviced separately. Check the specific vehicle's service information to determine whether individual replacement is possible.
No. P0586 is specifically an electrical open-circuit code for the vent control solenoid. A vacuum leak may cause cruise control performance problems but would not trigger this particular circuit code.