Cruise Control Vent Control Circuit/Open
The cruise control vent control circuit is open or has excessive resistance, preventing proper operation of the cruise control system. This code indicates an electrical circuit fault in the cruise control vent solenoid or its wiring that prevents the system from functioning correctly.
What You Might Notice
- Cruise control will not engage or maintain speed
- Check Engine Light illuminated on dashboard
- Cruise control button unresponsive or inoperative
- Inability to set or adjust cruise control speed
- Cruise control system disabled or unavailable
Most Common Causes
- 1
Open or broken cruise control vent solenoid circuit wiring
Wiring to the cruise control vent solenoid is broken, corroded, or disconnected, causing an open circuit. This is the most common cause of P0586.
- 2
Faulty cruise control vent solenoid
The vent solenoid itself has failed internally or its coil is open, preventing electrical current from flowing through the component.
- 3
Poor electrical connections or corroded connectors
Corroded, loose, or improperly seated connectors at the solenoid or in the wiring harness create high resistance or complete circuit breaks.
- 4
Engine Control Module (ECM) malfunction
In rare cases, a faulty ECM unable to properly control the vent solenoid output can trigger this code.
How to Diagnose It
- 1
Check Open or broken cruise control vent solenoid circuit wiring — Wiring to the cruise control vent solenoid is broken, corroded, or disconnected, causing an open circuit. This is the most common cause of P0586.
- 2
Check Faulty cruise control vent solenoid — The vent solenoid itself has failed internally or its coil is open, preventing electrical current from flowing through the component.
- 3
Check Poor electrical connections or corroded connectors — Corroded, loose, or improperly seated connectors at the solenoid or in the wiring harness create high resistance or complete circuit breaks.
- 4
Check Engine Control Module (ECM) malfunction — In rare cases, a faulty ECM unable to properly control the vent solenoid output can trigger this code.
How to Fix It
- 1
Inspect and repair cruise control wiring harness
Visually inspect all wiring from the ECM to the cruise control vent solenoid for breaks, corrosion, or damage. Repair or replace damaged wire segments and ensure all connectors are clean and properly seated.
- 2
Replace cruise control vent solenoid
Test the vent solenoid for continuity and resistance with a multimeter. If faulty, replace the solenoid assembly with a new or remanufactured unit.
- 3
Clean and reseat all electrical connectors
Disconnect and reconnect the cruise control solenoid connector and any inline connectors. Clean corrosion with contact cleaner and dielectric grease, then firmly reseat all connectors.
- 4
Test and replace ECM if necessary
After confirming wiring and solenoid are functional, perform ECM output voltage testing. If the module fails to supply proper voltage to the vent solenoid circuit, the ECM may require replacement.
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