P0582 Cruise Control Vacuum Control Circuit /Open

Description and meaning of DTC p0582

This is a generic powertrain diagnostic trouble code (DTC) and typically applies to OBD-II vehicles. Vehicle makes may include but aren't limited to Dodge, Chrysler, Jeep, Chevy, Hyundai, Ram, Ford, etc. There are numerous possible ways your vehicle goes about controlling your cruise control system. One of the avenues manufacturers tend to use to control the cruise control, is a vacuum controlled and operated system. Most times, they use vacuum as an efficient way of controlling a cruise control servo or a similar diaphragm-type control. The vacuum control circuit is integral to the proper operation of this system. The ECM (Engine control module) monitors/adjusts the vacuum control side accordingly, depending on the operator's cruise control demands. If the ECM loses it's monitoring capabilities to the cruise control vacuum control circuit, it will most likely cause your cruise control to stop functioning as it should. A lot of times, these systems will include a vacuum solenoid, which is in charge of controlling the vacuum flow to the control side of the system (i. e. it controls the speed of the vehicle, when cruise is active), that said, in other systems, the vacuum responsibilities are consolidated to solely the cruise control servo. As with many faults, this could be strictly an electrical issue caused by a mechanical issue, vice versa or both. While monitoring your cruise control sensors, circuits, switches, etc. , not to mention all the other systems in your vehicle, the ECM has detected a fault within the cruise control vacuum control circuit. Most likely one or more of the electrical values being monitored has gone out of range (i. e. beyond manufacturer specific-desired values). For P0582, it could be a general fault within the circuit or a loss of continuity in the cruise control vacuum electrical circuit.

p0582 diagnostic trouble code symptoms

Symptoms of a P0582 diagnostic code may include:Cruise control inoperativeCEL (Check engine light) illuminatedCertain functions not operating as they should (e. g. set,resume, accel. , etc. )Vehicle speed erratic, even with cruise set to specific speedCruise control light on permanently in instrument clusterOne or more cruise control functions not working properlyWhistling noises from engine bay

DTC p0582 - possible causes

Causes for this P0582 cruise control code may include:Vacuum solenoid defectiveCruise control servo defectiveVacuum lines broken/cracked/disconnected/kinkedMechanical obstruction in the cruise control servo's operating rangeWiring issue (e. g. short, open, corrosion, resistance, chafe, etc. )ECM (Engine control module) issueMechanical obstruction in vacuum passagewaysSeized cruise control servo cableEngine vacuum system leakConnector issue (e. g. broken tabs, corroded pins, melted housings, insulation missing, etc. )

How to fix OBD-II diagnostic trouble code p0582

The first step in the troubleshooting process for any malfunction is to research the Technical Service Bulletins (TSB) for known issues with the specific vehicle. Advanced diagnostic steps become very vehicle specific and may require the appropriate advanced equipment and knowledge to perform accurately. We include basic steps below but refer to a vehicle year/make/model/powertrain specific repair guide for specific steps for your vehicle. Basic Step #1The first thing's first, pop the hood to check things out within your cruise control system. You'll want to trace back the vacuum control line to see where it goes and what it controls. If it goes directly to a vacuum solenoid, thoroughly inspect the vacuum lines, solenoids, cruise control servo for physical damage. Anything obvious, should be repaired/replaced before further diagnosing. NOTE: When inspecting the cruise control servo, also verify the cable is not seized, as this can cause the monitored electrical values to go all over the place. Basic Step #2If a cruise control vacuum solenoid is present, it would be wise to verify it's electrical values to rule out the possibility of an internal fault. Refer to your vehicles service manual to get the precise values and procedures. I have seen these mounted to the firewall, fender wells, intake manifolds, etc. so make sure you are working with the correct solenoid before doing anything. If the recorded values are outside of the manufacturer's desired values, replace the solenoid, clear the engine light and test drive the system. Basic Step #3If you have used a vacuum gauge at one point or another, it would be a good idea to monitor the vacuum within the system. It is extremely important to acquire the vacuum from specific ports off the intake systems. Generally speaking, they will be located on the intake manifold itself but refer to your manual for specifics. This heavily depends on the specifics of your engine but normally, at operating temperature, with correct ignition timing the vacuum reading should be around 50-55 kPa.

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