P0582 indicates the powertrain control module has detected an open circuit in the electrical control path for the cruise control vacuum control solenoid or valve. In vacuum-actuated cruise systems, the PCM operates this solenoid to modulate vacuum to the servo; an open means the circuit cannot complete properly, so cruise control operation is disrupted.
The solenoid coil can open internally, or its plunger can stick, breaking the electrical circuit the PCM monitors.
Broken wires, corroded pins, chafed insulation, or poor connections between the PCM and the vacuum control solenoid create the open-circuit condition.
If the solenoid lacks battery voltage or a reliable ground due to a blown fuse, bad relay, or ground fault, the circuit appears open to the PCM.
Prior repairs, added accessories, or improperly routed harnesses can stress or disconnect the cruise control vacuum control circuit.
Although uncommon, the PCM's internal driver that commands the solenoid could fail; this should be considered only after the solenoid, wiring, power, and ground are proven good.
Usually not. Most P0582 faults are caused by a failed vacuum control solenoid, wiring or connector problems, or a blown fuse. PCM failure is rare and should only be considered after the rest of the circuit is verified good.
Yes. The vehicle is generally safe to drive; the main effect is that cruise control may not work. Normal throttle, braking, and transmission operation are unaffected.
No. P0582 refers to an electrical open in the control circuit for the vacuum solenoid, not a vacuum leak. However, damaged vacuum hoses to the servo can cause similar cruise-control symptoms and should be inspected separately.
Clearing the code may turn off the light temporarily, but if the open circuit is still present, the code and symptoms will return once the system is retested.