P0586 — Cruise Control Vent Control Circuit/Open #

Note: The code title may vary depending on the manufacturer.

• Cruise Control Vent Control Circuit Low (Ford)
• Cruise Control Vent Control Circuit/Open (General Motors, Toyota, Chrysler)
• Cruise Control Deactivation Switch Circuit/Open (Hyundai, Kia)

Summary of code P0586 #

P0586 is a diagnostic trouble code (DTC) that indicates an issue with the cruise control vent control circuit in your vehicle’s engine control module (ECM) or powertrain control module (PCM). This circuit is responsible for venting or releasing vacuum or pressure from the cruise control actuator, which allows the cruise control system to disengage smoothly when needed. If the control module detects an open circuit (an electrical break or interruption), it sets this code and usually disables cruise control as a precaution. While the engine and transmission are unlikely to be directly affected, the convenience and safety of cruise control are compromised. The code is most frequently found in vehicles with vacuum-operated cruise control systems, but can also appear on electronic actuator systems depending on the OEM design.

Common symptoms for code P0586 #

When P0586 is triggered, most drivers will notice that the cruise control system does not function as intended—or at all. The ECM/PCM disables cruise control to prevent unsafe operation. In some cases, you may experience related warning lights or messages. Typical symptoms include:

• Cruise control not engaging or turning off unexpectedly
• Cruise control indicator light flashing or remaining off when trying to activate
• Check Engine Light or Service Engine Soon warning illuminated
• Loss of cruise control speed holding during operation

Probable causes for code P0586 #

P0586 is most often caused by electrical or component faults within the cruise control vent circuit. While each vehicle’s system may have unique vulnerabilities, the following are the most common causes, listed in order of likelihood:

1. Open or damaged wiring harness in the cruise control vent circuit
2. Faulty or disconnected cruise control vent solenoid (the component that opens/closes to vent vacuum/pressure)
3. Corroded or loose connectors at the solenoid or module
4. Defective cruise control actuator assembly (vacuum or electronic type)
5. Blown fuse in the cruise control circuit
6. Faulty cruise control switch or steering wheel controls (less common)
7. Failed ECM/PCM output driver (rare, but possible)

Step-by-step diagnostics for code P0586 #

Diagnosing P0586 requires a methodical approach to pinpoint whether the issue is electrical, mechanical, or module-related. Here’s how most professional technicians approach this code:

• 1. Confirm the code with a scan tool and clear any stored faults. Attempt to operate cruise control and check if the code resets immediately.
• 2. Visually inspect the cruise control vent solenoid, actuator, and associated wiring for signs of damage, chafing, corrosion, or disconnection.
• 3. Test the vent control solenoid using a digital multimeter: Check for continuity and resistance to confirm the solenoid coil is intact (compare readings to OEM specifications).
• 4. Check for voltage supply and ground at the solenoid connector while operating cruise control (key ON, engine running, if applicable).
• 5. Inspect fuses related to the cruise control system and replace any that are blown.
• 6. Check connectors and terminals for corrosion or poor contact (especially at the solenoid and ECM/PCM).
• 7. If all external components test good, check wiring continuity between the PCM and solenoid using a wiring diagram. Repair as needed.
• 8. In rare cases, test ECM/PCM output if all other circuits/components are confirmed OK (requires advanced tools and procedures).

Possible repairs for code P0586 #

Once the cause is identified, the appropriate repair will restore cruise control operation and clear the code. Typical solutions include:

• Repair or replace damaged/cracked wiring in the vent control circuit
• Replace a faulty cruise control vent solenoid
• Clean or repair corroded connectors
• Replace a blown cruise control circuit fuse
• Replace the cruise control actuator assembly if defective
• Replace the cruise control switch (if testing indicates failure)
• In rare cases, replace or reprogram the ECM/PCM if no other faults are found

Can you drive with code P0586? #

Yes, you can continue driving with code P0586, as it does not directly affect engine or transmission function. However, cruise control will not operate until the fault is fixed. For most drivers, this is an inconvenience rather than a safety issue, but if you rely on cruise control for long trips or for maintaining speed, addressing the problem sooner is recommended. Always ensure the vehicle’s basic throttle and brake systems are fully functional.

Vehicles most commonly affected by code P0586 #

While P0586 can occur in a wide range of makes and models, it is most frequently reported in vehicles with vacuum-operated cruise control systems, especially from the following manufacturers:

• Ford (F-150, Escape, Explorer)
• Chevrolet (Silverado, Tahoe, Impala)
• GMC (Sierra, Yukon)
• Toyota (Camry, Corolla)
• Chrysler/Dodge/Jeep (Ram, Grand Caravan, Wrangler)
• Hyundai, Kia (Sonata, Santa Fe, Sorento)

Other brands may also be affected, but these models are statistically more likely to experience this specific code.

Common mistakes and best practices for code P0586 #

Fixing P0586 is typically straightforward, but there are some common pitfalls to avoid and best practices to follow:

• Misdiagnosing a failed solenoid when the real issue is a broken or corroded wire
• Overlooking blown fuses or corroded connectors
• Replacing the ECM/PCM prematurely without thorough testing of the circuit
• Neglecting to clear the code and test drive the vehicle after repairs
• Not using OEM wiring diagrams—always consult accurate service information for your make/model

Express FAQ for code P0586 #

Quick answers to the most common questions about code P0586:

• Q: Will P0586 cause my vehicle to fail emissions testing?
  A: Generally, no. P0586 does not affect emissions or engine performance. However, some states may fail a vehicle if the Check Engine Light is on, regardless of the underlying cause.
• Q: Can I fix P0586 myself, or do I need a professional?
  A: If you’re comfortable with basic electrical testing and have access to wiring diagrams, you may be able to diagnose and fix a blown fuse, loose connector, or damaged wiring yourself. For deeper issues involving the ECM/PCM or complex wiring, professional help is recommended.