P0586

Universal

Cruise Control Vent Control Circuit / Open

Definition source: General OBD-II reference catalog
Definition verification: Not independently verified for display.
Time: Varies by diagnosis and vehicle | Diagnostic difficulty: Medium
Low Severity

The cruise control system has detected an open or interrupted electrical path in its vent-control circuit. Depending on the vehicle's design, this circuit helps control or release cruise-control operation. Cruise control may not engage or may stop working, but the code alone does not prove that a particular part has failed.

Report an error with this code

⚠️ Before You Begin (Safety First)

This fault usually affects cruise control rather than basic vehicle control. Be prepared to control speed yourself and do not rely on cruise control until the system has been checked. If the vehicle does not respond normally to the accelerator or cruise control behaves unpredictably, stop using cruise control and have the vehicle inspected.

Common Symptoms

  • Cruise control may not engage because the system detects a problem in the vent-control circuit.
  • Cruise control may stop working or disengage unexpectedly if the fault interrupts system operation.
  • A warning light or stored diagnostic code may be the only noticeable sign.
  • The vehicle may otherwise drive normally because this code concerns the cruise-control circuit.

Common Causes

  • A damaged, broken, or disconnected wire may interrupt the vent-control circuit.
  • A loose, corroded, or damaged electrical connector may prevent a reliable connection.
  • A fuse or power-supply problem may interrupt the circuit, depending on the vehicle's design.
  • The vent-control component may have an internal electrical fault.
  • A ground, control-module connection, or control-module fault may interrupt circuit operation.

Diagnostic Steps

  1. Check the owner's manual to confirm whether cruise control is available for use and note any warning lights or changes in operation.
  2. Scan for other diagnostic codes and record them before clearing anything; related codes may help identify whether the issue affects a shared circuit.
  3. With the vehicle safely parked and the ignition off, visually inspect accessible cruise-control wiring and connectors for disconnection, corrosion, chafing, or damage.
  4. Check the relevant fuse only if the owner's manual identifies it; replace a blown fuse only with the specified type and rating, and seek help if it blows again.
  5. Avoid probing unidentified terminals or bypassing the circuit. If visual checks do not reveal the issue, have the circuit tested using vehicle-specific service information.

When to Call a Professional

Check for related codes and review the vehicle-specific wiring diagram before testing. A technician can inspect the vent-control circuit and connectors, check power, ground, and circuit continuity, and use scan data or available actuator commands to distinguish a wiring fault from a failed component or control issue. Confirm that cruise control cancels normally before returning the system to use.

Compare component listings

Confirm diagnosis and vehicle fitment before buying. A listing does not prove that a part needs replacement. We may earn a commission from qualifying purchases.

Search Amazon Search eBay

Commonly Asked Questions

Does P0586 mean the vent-control component must be replaced?

No. It identifies an open condition in the cruise-control vent-control circuit. Wiring, connectors, power, ground, or the component itself may be responsible, so testing is needed before replacing parts.

Can I drive with this code?

The vehicle may still drive normally, but cruise control may be unavailable or unreliable. Drive using the accelerator and avoid relying on cruise control until the fault is diagnosed.

Why might there be no obvious symptoms?

The fault may affect only cruise-control operation, so the vehicle can feel normal during ordinary driving. A stored code or warning light may be the only indication.

What distinguishes an open circuit from a failed vent-control component?

Circuit and component tests can show whether the electrical path is interrupted by wiring or a connector, or whether the vent-control component itself is not operating. The correct test method depends on the vehicle.

Browse Available Code Guides

Previous and next available guides in database record order, across makes. Adjacent entries may share a code number and do not necessarily describe related faults.