Description of the P0586 fault code.
OBD2 Error Codes

P0586 Cruise control ventilation control circuit open

26.05.2022 /

P0586 – OBD-II Trouble Code Technical Description

Trouble code P0586 indicates an electrical fault in the cruise control ventilation control solenoid valve circuit.

What does the fault code mean P0586?

Trouble code P0586 indicates an electrical problem in the cruise control purge control solenoid valve circuit. This code is general and indicates possible problems with the operation of this system. The cruise control system regulates vehicle speed, and if the engine control module (PCM) detects that speed cannot be controlled, the entire system performs a self-test. When P0586 appears, it indicates a malfunction of the purge control solenoid valve detected by the PCM.

Fault code P0586.

Possible reasons

Some possible reasons for the P0586 trouble code:

  • Damaged wires or connectors: The wires or connectors connecting the purge control solenoid valve to the engine control module (PCM) may be damaged or broken, causing poor contact or an open circuit.
  • Solenoid valve failure: The purge control valve itself may be faulty due to wear or damage, resulting in improper operation or complete inoperability.
  • Problems with the engine control module (PCM): The PCM may experience problems such as software errors or damage that may cause it to incorrectly read signals from the purge control valve.
  • Cruise control settings mismatch: Sometimes a mismatch in cruise control settings, perhaps as a result of repairs or replacement of components, can cause the P0586 code to appear.
  • Electrical interference: Electrical noise or short circuit caused by external factors such as moisture or corrosion may also cause this error to appear.

To accurately determine the cause, it is necessary to carry out diagnostics using a diagnostic scanner and check the electrical circuits in accordance with the repair manual for the specific make and model of the vehicle.

What are the symptoms of trouble code P0586?

Symptoms for DTC P0586 may include the following:

  • Cruise control not working: One of the most obvious symptoms may be cruise control not working. This means that the driver will not be able to set or maintain the vehicle's set speed using cruise control.
  • Unstable speed: If the cruise control does activate, but the car cannot maintain a constant speed and constantly accelerates or decelerates, this may also be a sign of a problem.
  • Activation of the Check Engine indicator: Code P0586 will cause the Check Engine Light (Check Engine Light) to be activated on the instrument panel. This is a warning that there is an error in the system that needs to be checked.
  • Unusual sounds or vibrations: In rare cases, a malfunction in the purge control solenoid valve may cause unusual sounds or vibrations in the area of ​​this component.

How to diagnose a fault code P0586?

The following steps are recommended to diagnose DTC P0586:

  1. Using the Diagnostic Scanner: First, connect the diagnostic scanner to your car's OBD-II port and read the trouble codes. Verify that the P0586 code is actually present in the system memory.
  2. Checking wires and connectors: Inspect the wires and connectors connecting the purge control solenoid valve to the engine control module (PCM). Check them for damage, corrosion or breaks.
  3. Checking the Purge Control Solenoid Valve: Check the condition of the solenoid valve itself. Make sure it moves freely and shows no signs of wear or damage. If necessary, the valve must be replaced.
  4. Engine Control Module (PCM) Diagnosis: Diagnose the PCM to ensure it is functioning correctly and can correctly interpret signals from the purge control solenoid valve.
  5. Checking electrical circuits: Verify that the electrical circuits connecting the purge control valve to the PCM are operating properly and do not have voltage, ground, or other electrical abnormalities.
  6. Additional tests: If necessary, additional tests may be needed to rule out other possible causes, such as problems with other cruise control system components or other electrical systems in the vehicle.

If you are not confident in your vehicle diagnostic or repair skills, it is recommended that you contact an experienced auto mechanic or auto repair shop to diagnose and repair the problem.

Diagnostic errors

When diagnosing DTC P0586, the following errors may occur:

  • Insufficient testing of electrical circuits: An error may occur if the electrical circuits associated with the purge control solenoid valve are not fully tested. This can lead to misidentification of the source of the problem and replacement of components unnecessarily.
  • Replacement of components without prior testing: Some mechanics may immediately suggest replacing the purge control solenoid valve or other components related to the cruise control system without performing a full diagnosis. This may result in unnecessary costs for replacing functional components.
  • Ignoring the repair manual: Some mechanics may neglect repair manuals or technical bulletins, which may contain important information about diagnosing and repairing a specific problem.
  • Unaccounted for problems with the control module: Sometimes mechanics may fail to check the engine control module (PCM) for software errors or hardware problems, which could be the cause of the P0586 code.
  • Limited diagnostics: Sometimes mechanics may limit themselves to reading fault codes and not fully diagnosing the cruise control system. This may result in missing other issues affecting the operation of that system.

To successfully diagnose and resolve a P0586 code, it is important to take a systematic and careful approach and refer to documentation and repair manuals for complete information.

How serious is the fault code? P0586?

Trouble code P0586 can be serious because it indicates problems with the cruise control system, which can reduce driving comfort and safety. Here are a few aspects to consider:

  • Cruise control unavailable: When code P0586 appears, cruise control may stop working. This can be inconvenient for the driver, especially on long journeys on the motorway, where cruise control helps reduce fatigue and improve driving comfort.
  • Potential impact on fuel economy: Cruise control usually helps maintain a stable speed, which can improve fuel economy. If cruise control is not available due to P0586, it may result in less fuel efficiency.
  • Activation of the Check Engine indicator: The appearance of the Check Engine light may indicate a problem with the vehicle's system. Although the P0586 code itself is not critical to driving safety, it does indicate a problem with the cruise control system that requires attention.
  • Possibility of other problems: Since the P0586 code indicates an electrical problem in the purge solenoid valve control circuit, it can also be a symptom of other problems in the vehicle's electrical system.

Overall, although the P0586 code is not critical to driving safety or engine performance, it requires careful attention and diagnosis to correct the problem and restore normal operation of the cruise control system.

What repair will help eliminate the code? P0586?

Resolving the P0586 trouble code may require several steps depending on the source of the problem, some possible steps are:

  1. Checking and replacing the purge control solenoid valve: If the purge control solenoid valve is truly faulty, it must be replaced. This component is usually located on the throttle body. After replacing the valve, it is recommended to carry out diagnostics to ensure its serviceability.
  2. Checking and replacing wires and connectors: Wires and connectors connecting the solenoid valve to the engine control module (PCM) should be inspected for damage, corrosion, or breaks. If necessary, they should be replaced or restored.
  3. Checking and updating PCM software: Sometimes updating the PCM software can solve the problem if the problem is due to misinterpretation of signals from the solenoid valve. This may require visiting an authorized dealer or service center that has the necessary hardware and software to update the PCM.
  4. Additional diagnostics: If the problem is not resolved after performing the steps above, you may need to perform a more detailed diagnosis of the cruise control system to identify other possible causes of the P0586 code, such as problems with other components or electrical circuits.

It is important to have your P0586 code diagnosed and repaired by a qualified auto mechanic or repair shop. This will help you avoid mistakes and ensure that your vehicle is repaired correctly.

What is P0586 Engine Code [Quick Guide]

P0586 – Brand-specific information

Trouble code P0586 can be applied to various brands of cars, some of them with explanations:

These are just a few examples, and the P0586 code may apply to other makes and models of vehicles. For more accurate information and repairs, it is recommended to contact the official repair manual or service center specialists.

Add a comment