P0581 Fault Code

Cruise Control Multi-Function Input A Circuit High

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

The P0581 fault code indicates an issue with the Cruise Control Multi-Function Input A Circuit, which is often associated with an electrical fault in the system responsible for monitoring the various inputs that control the cruise control functionality. This circuit is crucial for ensuring that the cruise control operates correctly by interpreting signals from the accelerator pedal and other related switches.

What are the symptoms of the P0581 code?

Vehicles exhibiting the P0581 code may demonstrate symptoms such as:

• Inability to engage or disengage cruise control.
• Cruise control system malfunction warnings in the dashboard.
• Erratic or incorrect speed control while cruise control is active.
• Engine power may be reduced due to safety protocols related to cruise control malfunction.

What causes the P0581 code?

Common causes of this fault code include:

• Short circuits or open circuits in the cruise control wiring.
• Faulty cruise control switches or pedal position sensors.
• Corroded or loose electrical connectors.
• Issues with the engine control module (ECM) that processes the cruise control signals.

How to fix P0581?

To resolve the P0581 fault code, follow these steps:

1. Conduct a thorough visual inspection of the cruise control wiring and connectors for damage or corrosion.
2. Test the multi-function switch and associated sensors for proper operation.
3. Repair or replace any faulty wiring or components.
4. Clear the fault code from the ECM and perform a test drive to ensure the issue is resolved.
5. If the problem persists, further diagnostic testing may be necessary to pinpoint the issue within the ECM or related systems.