P0582 Cruise Control Vacuum Control Circuit/Open

P0582 indicates an open cruise control vacuum control circuit. On vacuum-operated systems, the controller does not see expected continuity or response from the vacuum control solenoid path.

Code status

Needs verification

Not yet verified against SAE J2012_202509 / J2012DA. Treat unverified rows as a lookup aid, not repair authority.

System: Speed / Idle
Scope: iso-sae-controlled-p0
Standard: SAE J2012 / ISO 15031-6
Source: legacy-import

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 cruise switches when the fault points to the vacuum control solenoid circuit.

Useful checks before replacing parts

Check vacuum control solenoid command, supply voltage, control continuity, solenoid resistance, cruise enable status, and freeze-frame data.
Inspect vacuum hoses, servo diaphragm, solenoid connector, wiring opens, fuse feeds, grounds, and vacuum source integrity.
Command the vacuum control circuit and confirm electrical response plus servo vacuum movement where service procedures allow.

Related OBD-II codes

These nearby speed / idle entries can help compare wording and fault area. They may share the same verification status as the source database.