Error Code P0587 is defined as is defined as Cruise Control Vent Control Circuit Low. It’s a problem within the cruise control vent control circuit likely caused by a defective vent control solenoid.
This code is a generic trouble code, meaning it applies to all cars equipped with the OBD-II system and cruise control system. It is particularly common among Chevrolet, Chrysler, Dodge, Hyundai, Honda, Ram, etc. Specifications on the definition, troubleshooting, and repairs vary from one make and model, and powertrain configuration.
Cruise control makes driving a more pleasurable and safe experience. While its main function is to control speed, it has other uses too:
It will allow your 2018 Dodge Durango to accelerate or decelerate by 1 mile per hour (for example) with a simple tap of a button. It will keep you and your passengers safe by disengaging as soon as you step on the brake pedal. Also, it will not activate under 25 mph.
The Cruise Control system is controlled by the PCM (powertrain control module, also known as ECM or engine control module in other 2018 Dodge Durango makes), or by a Cruise Control Module in other makes. The PCM has a vast amount of readings to control the speed of your 2018 Dodge Durango automatically. If drivers can’t control your 2018 Dodge Durango ’s speed with cruise, the PCM will run a test that includes the whole cruise control system to identify potential problems.
In most cases, the Cruise Control Vent is used to control the said system and ensure the PCM can adjust the vacuum within the system. The function of the vent is extremely important, as it can affect the cruise control servo’s function. The servo is responsible for adjusting and controlling the speed when the cruise control is activated.
If the self-diagnose test of the PCM reveals a problem, it will activate a cruise control code based on the problem.
Error Code P0587 is a generic trouble code that appears when the self-diagnose test of PCM shows electrical level from the cruise control vent circuit that is LOWER than normal.
Check Engine light will be activated on the dashboard, and the code will be registered. Other common symptoms for the code include:
The most common cause for this code is damaged electrical components in the cruise control system. Also, the switch can malfunction from liquid spills in your 2018 Dodge Durango ’s interior. Other possible causes include:
The best start for diagnosis of this code is to check the TSB (Technical Service Bulletin) for known issues with the specific 2018 Dodge Durango . Some cars may require advanced diagnostic steps and special tools, which differs from one type of 2018 Dodge Durango to another. Here are some basic steps for diagnosis.
The most common repair for this code is simply replacing the cruise control switch. However, before proceeding with any replacements, make sure you conduct a thorough diagnosis to pinpoint the exact cause of the problem. You can follow the diagnostic steps from your 2018 Dodge Durango ’s service manual to determine whether a faulty switch is causing the problem.
Start by disconnecting your 2018 Dodge Durango ’s battery. Then, using a screwdriver, remove the steering wheel column bolt covers. Remove ratchet if necessary as well.
You may need to remove the center airbag cluster from the center of the steering wheel. Unbolt it from the back of the steering wheel.
Next, disconnect the electrical connector to the airbag cluster by pressing its side clips and pulling them from the hard plastic side areas. You may have to remove the steering wheel to get access to the switch. You may need a special puller for this.
Note: Make sure you refer to your 2018 Dodge Durango ’s service manual for the proper steering wheel or airbag removal procedures.
Once you have disconnected the electrical connectors from the cruise control switch, detach the switch by removing the bolts that hold the switch onto the steering column bracket. Then, replace the old cruise control switch with a new one and reinstall everything.
Reconnect the battery and then take your 2018 Dodge Durango for a test drive. Of course, make sure the traffic isn’t too bad so you can use the cruise control and be safe.
Another common cause for this code is a mechanical problem within the cruise control vacuum system. This could be physical damage to the cruise control vacuum solenoid itself, and a vacuum leak in the system, which may be caused by obstructed lines, kinked, etc. These mechanical problems are easy to spot when inspecting the components involved in the system.
Vacuum leaks must be repaired, if not replaced. Again, refer to your 2018 Dodge Durango ’s service manual for the specific diagnosis and repair procedure.
Common repairs for this code include:
This error code doesn’t impose serious driving safety concern. However, if you rely on cruise control system on a regular basis, then it must be addressed as soon as possible and keep it from getting worse.
It’s common to overlook blown fuses when diagnosing this code, so make sure you check it as well.