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P0587 OBD-II Trouble Code: Cruise Control Vent Control Circuit Low

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P0587 code definition

The P0587 trouble code detects an error with the cruise control vent control circuit.

What the P0587 code means

The P0587 code is a generic OBD-II trouble code that signals an issue with the cruise control vent control circuit. The cruise control module works together with the powertrain control module (PCM), to help automatically control the speed of the car. When the PCM notices that is unable to control the vehicle’s speed, it will test each part of the cruise control system. If the voltage or resistance is not what the PCM expects, then the P0587 code will be triggered.

What causes the P0587 code?

The most common cause of the P0587 trouble code is a defective vent control solenoid. This often occurs when damage is done to the cruise control buttons, usually because of spills. Other possible culprits are wires, connectors, and fuses that are damaged in any way.

What are the symptoms of the P0587 code?

When the P0587 trouble code is detected, the check engine soon Warning Light will likely illuminate on the gauge cluster, though this won’t happen with all vehicles. It is very probable that the cruise control system will not be working. The P0587 code may also result in some blown fuses.

How does a mechanic diagnose the P0587 code?

The P0587 trouble code will be diagnosed using a standard OBD-II trouble code scanner. A trained technician will begin by examining the freeze frame data from the scanner, and will also search for additional trouble codes that are present. The trouble codes will then be reset, and the vehicle should be restarted and taken for a short test drive. If the code does not return, then it was likely triggered erroneously, or represents an intermittent issue.

If the P0587 code does return, then the mechanic should begin by visually inspecting all of the electrical components associated with the cruise control system. All wires, harnesses, connectors, and fuses should be checked for damage, and replaced if needed.

After the visual inspection, the vent control solenoid should be checked, and possibly replaced. After the solenoid, the vacuum hoses and valves will be inspected.

After any component replacements, the trouble codes should be reset and the vehicle restarted. This assures that the mechanic knows when the issue has been resolved, and keeps pointless repairs from taking place.

Common mistakes when diagnosing the P0587 code

The most frequently made error when diagnosing the P0587 code comes from failing to properly comply with the OBD-II trouble code diagnosis protocol. The proper protocol should always be observed and followed, in order, to ensure an efficient inspection and repair.

It is fairly common for erroneous components to be replaced when a blown fuse is the only issue causing the P0587 code.

How serious is the P0587 code?

A vehicle with a detected P0587 trouble code is still very drivable. However, the cruise control system likely will not work. The P0587 code is not an urgent one, but it’s still one that should be addressed sooner rather than later.

What repairs can fix the P0587 code?

The most common repairs for the P0587 trouble code are:

Additional comments for consideration regarding the P0587 code

In some vehicles, the PCM will need to detect the cruise control vent circuit control issue three times before the check engine soon Warning Light is illuminated or the trouble code is detected.

Need help with a P0587 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
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