Cruise Control Vent Control Circuit/Open
The P0586 code indicates a fault in the cruise control vent control circuit, which is part of the vacuum system that regulates the throttle position. The vent solenoid releases vacuum to disengage cruise control. An open circuit means the solenoid is not receiving power or has a broken wire, preventing the system from venting vacuum properly. This can cause the cruise control to not engage or to disengage unexpectedly.
01. Most Common Causes
- Faulty cruise control vent solenoid
- Open or shorted wiring in the vent control circuit
- Blown fuse or bad relay
- Faulty cruise control module
02. Symptoms You Will Notice
- Cruise control does not engage
- Cruise control disengages unexpectedly
- Check Engine Light illuminated
03. Step-by-Step Diagnosis
Step 1: Use a scan tool to confirm the code and check for other related codes.
Step 2: Visually inspect the vent solenoid and wiring for damage or corrosion.
Step 3: Test the vent solenoid resistance with a multimeter (specs vary, typically 20-40 ohms).
Step 4: Check for power and ground at the solenoid connector with the ignition on.
Step 5: If power and ground are present, replace the vent solenoid. If not, repair the wiring or replace the fuse/relay.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
Yes, it is safe to drive, but cruise control will not function properly. The vehicle's braking and steering are unaffected.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150, including parts (solenoid) and labor. DIY repair can be cheaper if you replace the solenoid yourself.