P0582
UniversalCruise Control Vacuum Control Circuit /Open
The cruise-control system may use an electrically controlled vacuum device to operate or regulate cruise speed. This code indicates that the control circuit is detected as open, meaning the expected electrical path may be interrupted. Cruise control may not work or may be disabled; the code alone does not prove that a particular part has failed.
⚠️ Before You Begin (Safety First)
If cruise control behaves unpredictably, switch it off and pull over safely if needed. Do not rely on cruise control until the fault is diagnosed. If the vehicle otherwise drives normally, this fault typically affects cruise-control operation rather than basic driving, but follow any other warning lights or symptoms.
Common Symptoms
- Cruise control may not set or may be disabled because the control circuit cannot operate as expected.
- Cruise control may stop working intermittently if a wire or connection makes and loses contact.
- The vehicle may show a check-engine or cruise-control warning, depending on the vehicle.
- There may be no noticeable symptoms beyond a stored code if cruise control is not being used.
Common Causes
- An open, damaged, or disconnected wire in the cruise-control vacuum-control circuit.
- A loose, corroded, or damaged electrical connector.
- An open circuit within the vacuum-control solenoid or another component on the circuit.
- A fuse or control-side fault, where applicable to the vehicle's circuit design.
- A control module or circuit-driver fault, which should be considered only after wiring and connected components are tested.
Diagnostic Steps
- Note any cruise-control symptoms and other warning lights; this helps distinguish an isolated cruise-control fault from a broader drivability problem.
- With the vehicle safely parked and the ignition off, visually inspect accessible cruise-control wiring and connectors for disconnection, corrosion, chafing, or damage.
- Check the owner's manual for any relevant fuse and inspect it only as directed; replace a fuse only with the specified type and rating, and seek diagnosis if it blows again.
- Avoid probing unidentified terminals or applying power directly to components. Use vehicle-specific service information, or have a technician test the circuit and vacuum components.
When to Call a Professional
Use vehicle-specific service information and a wiring diagram to identify the circuit. A technician can check scan data, inspect connectors and wiring, and test circuit continuity and control operation. Check the vacuum actuator and hoses separately if electrical testing shows the circuit is working, since a vacuum fault can affect cruise operation without itself explaining an open electrical circuit.
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Commonly Asked Questions
Does P0582 prove the vacuum-control solenoid has failed?
No. It indicates an open condition in the cruise-control vacuum-control circuit. Wiring, connectors, a fuse, a connected component, or a control-side fault may be involved.
Can a vacuum leak cause this code?
A vacuum leak can interfere with cruise-control operation on systems that use vacuum, but it does not by itself establish an electrical open circuit. Check the electrical circuit and vacuum system as separate diagnostic steps.
Is it safe to drive with cruise control unavailable?
If the vehicle drives normally and no other serious warnings or symptoms are present, the main effect may be loss of cruise control. Do not use cruise control until the fault is resolved, and stop safely if the system behaves unpredictably.
Can I clear the code and consider it fixed?
Clearing the code does not repair an open circuit. If it returns, the circuit needs diagnosis; even if it does not return immediately, check whether cruise control operates normally before relying on it.
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