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P0584 is a diagnostic trouble code (DTC) for "Cruise Control Vacuum Control Circuit High". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.
The P0584 trouble code notes an error with the cruise control vacuum control circuit.
The P0584 code is a standard OBD-II trouble code that signals an electrical issue with the cruise control vacuum control circuit. The cruise control system, which allows the vehicle to maintain a constant speed, is controlled by the powertrain control module (PCM) and cruise control module, which work together to control the speed. When the vehicle is unable to control the speed, the PCM will test the cruise control system in totality, and if a vacuum control circuit error is detected, the P0584 code will be issued.
The most common causes of the P0584 trouble code are:
The P0584 trouble code will often be accompanied by the check engine soon Warning Light, which will illuminate in the gauge cluster. In most cases, the cruise control system will not work at all.
The P0584 code will be diagnosed with the help of an OBD-II trouble code scanner. A trained mechanic can use the scanner to observe the freeze frame data, which will offer information about the code. At this time the mechanic will also check to see if there are any additional trouble codes stored, as codes should always be addressed in the order in which the scanner displays them. The trouble codes will then be reset, and the vehicle will be restarted, to see if the code returns. If the code does not return, then it should be assumed that was erroneously detected, or that there is an intermittent error.
If the code remains detected following the reset, then the mechanic will visually inspect the electrical components in the cruise control system. Any damaged circuits, shorted wires, blown fuses, or loose or corroded connectors should be replaced.
Next, the vacuum supply hoses in the system will need to be inspected. If a visual inspection yields no results, then a vacuum pressure test can be done, with the results compared to those of the manufacturer’s specifications. The one-way valve can then be tested by blowing through it in both directions. If it can be blown through in both directions, then it is defective and requires replacement. If the issue is still unsolved, then a defective cruise control switch is likely the culprit.
After any and all replacements, the mechanic will need to stop and reset the trouble codes, restart the vehicle, and check again for the code. By doing this, the technician will know as soon as the issue is resolved.
The most frequently made mistake when diagnosing this code comes from a failure to properly follow the OBD-II trouble code diagnosis protocol. It’s imperative that technicians abide by the protocol at all times, as this results in an effective and efficient diagnosis.
Erroneous repairs are commonly made when an electrical issue was the only problem in the system.
A vehicle with a detected P0584 trouble code will still be drivable, though the cruise control system will most likely be inoperable.
Common repairs for the P0584 trouble code are:
The P0584 trouble code only applies to vehicles with cruise control systems. In some vehicles, the error will have to be noted by the PCM multiple times before the check engine soon Warning Light will be illuminated.
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