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Engine Fault Code P0587

Cruise Control Vent Control Circuit Low

Care Engine Code Reader
The Engine Fault Code P0587 refers to a problem with the cruise control system, specifically the `Cruise Control Vent Control Circuit Low.` This code typically indicates that the voltage in the cruise control vent circuit is lower than expected. This can affect the cruise control`s ability to function properly.

While the basic meaning of P0587 is generally consistent across many manufacturers, there can be slight variations depending on the specific vehicle. Here are some alternative meanings or related issues for different brands:

1. Porsche: Similar to the general definition, it may indicate a fault in the cruise control system, possibly linked to the throttle control.

2. Mini: The code may suggest an issue with the cruise control module or wiring, impacting the system`s performance.

3. Mercedes: It could refer to a malfunction in the cruise control system or a related component, like the accelerator pedal position sensor.

4. Audi: This code may indicate a problem with the cruise control switch or a fault in the wiring harness.

5. Jaguar: It might point to an issue with the cruise control actuator or a fault in the control circuit.

6. Land Rover: Similar to others, it could indicate a problem with the cruise control system, possibly involving the brake or accelerator pedal sensors.

In any case, if you encounter this code, it`s best to inspect the cruise control system, including wiring and related components, to determine the exact cause of the issue.
The Engine Fault Code P0587 indicates an issue with the cruise control vent control circuit being too low. This code can be triggered by several factors, and while the general cause is similar across manufacturers, there may be specific differences based on the vehicle type. Here are some common causes:

1. Faulty Cruise Control Switch: The switch that activates the cruise control may be malfunctioning. This can lead to incorrect signals being sent to the engine control module (ECM).

2. Wiring Issues: Damaged or corroded wires in the cruise control circuit can cause low voltage readings. This is common in older vehicles or those exposed to harsh conditions.

3. Faulty Cruise Control Module: The cruise control module itself could be defective. This component is responsible for managing the cruise control system and can fail over time.

4. Ground Connection Problems: A poor ground connection in the cruise control circuit can lead to low voltage readings. This is often overlooked but can be a simple fix.

5. ECM Issues: In rare cases, the engine control module may have a fault or software issue that affects the cruise control system.

6. Vehicle-Specific Factors:
Porsche: Check for any software updates or recalls that might affect the cruise control system.
Mini: Look for issues with the steering wheel controls, as they often integrate with the cruise control.
Mercedes: Sometimes, the issue may be linked to the adaptive cruise control system, requiring a more in-depth diagnosis.
Audi: Audi vehicles may have additional sensors involved in the cruise control system, which could also contribute to this code.
Jaguar: Jaguar models might experience issues with the electronic throttle control, which can affect cruise control performance.
Land Rover: In Land Rover vehicles, check for any air suspension issues, as they can sometimes interfere with cruise control functions.

If you encounter this code, its a good idea to start with a thorough inspection of the wiring, switches, and modules involved in the cruise control system. If you`re unsure, consulting a professional mechanic with experience in European cars can help pinpoint the issue accurately.
The Engine Fault Code P0587 indicates a problem with the cruise control vent control circuit. This code can appear in various vehicles, including European brands like Porsche, Mini, Mercedes, Audi, Jaguar, and Land Rover. Heres a general guide on how to troubleshoot and fix this issue:

Steps to Fix P0587:

1. Check the Cruise Control Switch:
– Inspect the cruise control switch on the steering wheel. Ensure its functioning correctly. If it feels sticky or doesnt click properly, it may need replacement.

2. Inspect Wiring and Connectors:
– Look for damaged or corroded wires and connectors in the cruise control system. Pay special attention to the wiring harness leading to the cruise control module. Repair or replace any damaged sections.

3. Test the Cruise Control Module:
– The cruise control module may be faulty. If you have access to a diagnostic tool, you can check for any additional codes or data readings. If the module is not responding, it may need to be replaced.

4. Check the Brake Pedal Switch:
– The brake pedal switch can affect cruise control operation. Make sure its working properly. If its stuck or malfunctioning, it can cause the P0587 code.

5. Inspect the Throttle Position Sensor (TPS):
– The TPS sends information about the throttle position to the engine control unit (ECU). If its faulty, it can trigger cruise control issues. Test it for proper voltage and replace it if necessary.

6. Look for Vacuum Leaks:
– Some vehicles use a vacuum system for cruise control. Check for any vacuum leaks in the hoses or connections. Repair any leaks you find.

7. Clear the Code:
– After making repairs, use an OBD-II scanner to clear the fault code. Then take the vehicle for a test drive to see if the code returns.

Manufacturer-Specific Considerations:

Porsche:
– Check the PCM (Powertrain Control Module) for software updates. Sometimes, a reflash can solve communication issues.

Mini:
– Look for specific TSBs (Technical Service Bulletins) related to the cruise control system, as Mini vehicles may have unique quirks.

Mercedes:
– Mercedes vehicles often have complex electronic systems. If the issue persists, consider taking it to a dealer for a more in-depth diagnosis.

Audi:
– Audi may have specific wiring diagrams available in their service manuals that can help pinpoint issues in the control circuit.

Jaguar:
– Check for known issues with the cruise control system in your specific model year. Some Jaguars have had recalls related to cruise control.

Land Rover:
– Ensure that the vehicle`s battery is in good condition, as low voltage can affect electronic systems, including cruise control.


Fixing the P0587 code involves a systematic approach to diagnosing the cruise control system. Always refer to the specific service manual for your vehicle for any unique procedures or specifications. If you`re not comfortable performing these checks, it may be best to consult a professional mechanic.
Driving with a P0587 code, which refers to the `Cruise Control Vent Control Circuit Low,` is generally not recommended. This code indicates an issue with the cruise control system, which could affect its performance. Heres a breakdown of the potential safety impacts and manufacturer differences:

1. Safety Concerns:
– If the cruise control is malfunctioning, it may not engage or disengage properly. This can be dangerous, especially in heavy traffic or on highways.
– In some cases, the cruise control might become stuck, leading to difficulty in controlling your speed.

2. Manufacturer Differences:
Porsche: Typically, a P0587 code may not disable the vehicle, but it can affect the cruise control. Its best to have it checked to avoid any unexpected behavior.
Mini: Similar to Porsche, the cruise control might not work correctly. It`s advisable to get it diagnosed to ensure safe driving.
Mercedes: Mercedes vehicles often have advanced cruise control systems. A malfunction could lead to reduced functionality, so it`s wise to address the issue promptly.
Audi: Audi`s systems can be complex. While you can drive the car, you should fix the issue soon to avoid any complications.
Jaguar: Jaguars may have unique cruise control features. Driving with this code could lead to unexpected cruise control behavior, so its best to get it checked.
Land Rover: Similar to Jaguar, Land Rover vehicles might have advanced systems that could be affected. It`s safer to resolve the issue before driving too much.


While you can technically drive with a P0587 code, it poses risks, especially regarding cruise control functionality. Its best to have a professional mechanic diagnose and fix the issue for safer driving.

OBD Codes Explained

Engine Codes

P is for PowerTrain - Engine and Transmission.

P0 Indicates Generic Powertrain Codes

P0 Codes indicate problems with the powertrain and are common for all vehicles using the OBD-II Standard.

P1 Enhanced Manufacturer Specific Codes

P1 Codes are specific to manufacturers.

Sub-System

The 3rd Digit indicates the Sub-System

1 – Emission Management

2 – Injector Circuit

3 – Ignition

4 – Emission Control

5 – Vehicle Speed and Idle

6 – Computer and Output

7 – Transmission

8 – Transmission

9 – Reserved

0 – Reserved

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