P0584
Cruise Control Vacuum Control Circuit High
Vehicle speed & idle control
Generic OBD-II
Low
What it means
P0584 means the module saw a high (open or short-to-voltage) reading on the circuit that controls the cruise control vacuum solenoid. On vacuum-actuated cruise systems, this solenoid meters engine vacuum to the servo that holds throttle. It's a comfort-feature fault — cruise control won't work, but the engine and drivability are unaffected. The usual causes are wiring, the solenoid, or a leaking vacuum hose or check valve.
Low
Can I keep driving? Safe to drive — only the cruise control is affected; the engine runs and drives normally.
Common symptoms
What you'll notice
- Cruise control inoperative or won't hold speed
- Check-engine light on
Common causes
Most likely first
- Faulty vacuum control solenoid or its control circuitLikely
- Open or short-to-voltage in the solenoid wiring (high reading)Common
- Damaged or leaking vacuum supply hoseCommon
- Malfunctioning one-way check valve in the vacuum lineLess often
How to diagnose & fix
Work through it in order
- Read freeze-frame, then check the vacuum control solenoid circuit for an open or short-to-power that would drive the reading high.
- Inspect the vacuum supply hose and one-way check valve for leaks, cracks, or blockage.
- Measure the solenoid resistance and compare to spec; replace if out of range.
- Repair the wiring or replace the solenoid, then clear and re-test cruise operation.
FAQ
Quick answers
Is it safe to drive with P0584?+
Yes. This is a vacuum-actuated cruise control fault — the engine and brakes are unaffected. Only cruise control won't work until it's repaired.
Can I just clear P0584?+
It will clear, but returns once the module next commands the vacuum solenoid and sees the circuit out of range. Fix the wiring, solenoid, or vacuum line first.
Related codes
Read & clear P0584 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX