Cruise Control Vacuum Control Circuit /Open
The cruise control system uses a vacuum valve to maintain your set speed, but the ECU detected an open circuit in that valve's wiring or connector. It's like a broken wire to a light switch—the signal can't get through.
The ECU monitors the vacuum control solenoid circuit for proper voltage and continuity when cruise control is activated. It expects to see a complete circuit with specific voltage levels when the solenoid is commanded on. An open circuit means no continuity is detected, indicating a broken wire, failed solenoid, or bad connector.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Solenoid Circuit Continuity | Closed circuit, 0–0.5 ohms resistance | Open circuit, infinite resistance or no voltage response |
| Solenoid Control Voltage | 12V nominal when commanded | 0V or below threshold |
Code P0582 is a moderate fault. You can generally drive to a workshop, but avoid long trips or high-load driving (motorway, uphill towing) until it is diagnosed. If the code keeps returning after clearing, or if you notice the symptoms listed above worsening, do not delay professional diagnosis. Many moderate codes have multiple possible root causes — a mechanic with live OBD data can identify the exact fault more efficiently than part-by-part trial and error.
Once the fault is repaired, P0582 can be cleared using any OBD-II scanner. Connect the scanner, navigate to "Clear Codes" or "Erase DTCs," and confirm. The check engine light turns off immediately.
The code will return if the root cause was not actually fixed. The ECM re-detects the fault within 1–3 drive cycles and sets the code again.