P0587 Fault Code

Cruise Control Vent Control Circuit Low

• What does that mean?
• Symptoms
• Causes
• Solutions

The P0587 fault code indicates an issue with the cruise control vent control circuit being detected as low. This typically means that the cruise control system is not functioning correctly due to insufficient voltage or a fault in the control circuit.

• The vent control circuit is essential for the proper operation of the cruise control system, allowing it to maintain the desired speed.
• Low voltage in this circuit can lead to erratic or non-functioning cruise control features.
• This fault may trigger a warning light on the dashboard or result in the cruise control system becoming disabled.

What are the symptoms of the P0587 code?

Symptoms commonly associated with the P0587 code may include:

• The cruise control system not engaging or disengaging unexpectedly.
• Inconsistent speed maintenance while using cruise control.
• Dashboard warning lights indicating a fault in the cruise control system.
• The inability of the vehicle to maintain the desired speed when the cruise control is activated.

What causes the P0587 code?

There are several potential causes for the P0587 fault code, including:

• A damaged or frayed wiring harness related to the cruise control system.
• Faulty connectors that may lead to poor electrical connections.
• A malfunctioning cruise control module or an issue within the control circuit.
• Issues with the brake light switch or other related sensors that may affect the cruise control operation.

How to fix P0587?

To resolve the P0587 fault code, consider the following steps:

• Inspect the wiring harness and connectors for any signs of damage or corrosion, and repair or replace as necessary.
• Test the cruise control module and other components in the control circuit for functionality and replace faulty parts.
• Check the brake light switch operation to ensure it is functioning properly, as it can impact cruise control functionality.
• Clear the fault code from the vehicle's computer and test drive to see if the issue reoccurs. If it does, further diagnostics may be necessary.