P0584 Cruise Control Vacuum Control Circuit High

P0584 indicates a high condition in the cruise control vacuum control circuit. The circuit voltage or feedback is above the expected range.

Code details

Generic OBD-II · P0

System: Speed / Idle
Code type: Generic (SAE / ISO controlled)
Standard: SAE J2012 / ISO 15031-6

Diagnostic boundary

A diagnostic trouble code reports that a monitored test failed. It does not prove one specific part is bad, and manufacturer logic can add vehicle-specific conditions.

Do not replace the control module until open grounds and short-to-voltage faults in the vacuum circuit are ruled out.

Symptoms of P0584

Unstable, high, or low idle, or stalling.
Erratic speedometer, cruise-control, or shift behaviour.
Check-engine light with a hesitation or surge.

Common causes of P0584

A dirty throttle body, idle-control valve, or throttle-position sensor.
A failing vehicle-speed or wheel-speed sensor, or its wiring.
Vacuum leaks or a related sensor forcing the idle/speed strategy.

Useful checks before replacing parts

Review vacuum control command, circuit voltage, solenoid current, driver status, cruise enable data, and freeze-frame conditions.
Inspect for short-to-voltage faults, open grounds, connector corrosion, stuck solenoid loads, and damaged harness sections near engine heat.
Command the solenoid and verify whether voltage, current, and servo vacuum response change correctly.

Related OBD-II codes

These nearby speed / idle entries can help compare wording and pin down the fault area.