AutoCodes – Buick – P0581 Buick

P0581 Buick Code - Cruise Control Multifunction Switch Circuit Low Voltage

Quick Answer

The Cruise Control Switch is an input to the Body Control Module (BCM). Common causes include Faulty Cruise Control Switch, Cruise Control Switch harness is open or shorted, Cruise Control Switch circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P0581 Buick indicates Cruise Control Multifunction Switch Circuit Low Voltage.
Common causes: Common causes include Faulty Cruise Control Switch, Cruise Control Switch harness is open or shorted, Cruise Control Switch circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 1,180

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 25, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0581 Buick Description

The Cruise Control Switch is an input to the Body Control Module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate and cancel switches via the cruise control switch signal circuit in order to detect when the driver has requested to perform a cruise control function. The BCM detects a specific voltage signal on the cruise control switch signal circuit when a switch is applied. The Engine Control Module (ECM) receives the requested cruise control switch function from the BCM via a serial data message. The Diagnostic Trouble Code (DTC) will be set when the ECM detects an invalid voltage signal on the cruise control switch signal circuit.

OBDII Code P0581 Buick - Cruise Control Multifunction Switch Circuit Low Voltage - AutoCodes.com — P0581 Buick Code - Cruise Control Multifunction Switch Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P0581 Buick?

Faulty Cruise Control Switch
Cruise Control Switch harness is open or shorted
Cruise Control Switch circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC P0581 Buick?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0581 Buick code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0581 Buick Code

1. What are the common symptoms of OBDII code P0581 in a Buick related to the Cruise Control Multifunction Switch Circuit Low Voltage?

- Common symptoms include inoperative cruise control functionality, illuminated check engine light, and potential issues with other steering wheel-mounted controls.

2. What are the possible causes of the P0581 code in a Buick's Cruise Control Multifunction Switch Circuit?

- The code may be triggered by a faulty multifunction switch, damaged wiring or connectors, a blown fuse, or issues with the cruise control module.

3. How can I diagnose the P0581 code in my Buick related to the Cruise Control Multifunction Switch Circuit?

- Diagnose the code by checking the cruise control fuse, inspecting wiring and connectors for damage, testing the multifunction switch, and scanning for any other related trouble codes.

4. What are some repair tips for addressing the Cruise Control Multifunction Switch Circuit Low Voltage issue in a Buick?

- Repair tips include replacing the faulty multifunction switch, repairing damaged wiring or connectors, checking and replacing fuses if necessary, and clearing the trouble codes after repairs are completed.

5. Can I still drive my Buick with the P0581 code related to the Cruise Control Multifunction Switch Circuit?

- It is generally safe to drive your Buick with this code, but keep in mind that the cruise control system may not function properly until the issue is diagnosed and repaired.

6. How much does it typically cost to repair the Cruise Control Multifunction Switch Circuit Low Voltage problem in a Buick?

- The cost of repair can vary depending on the specific cause of the issue, but it may range from $100 to $300 for parts and labor.

7. Is it possible to reset the P0581 code related to the Cruise Control Multifunction Switch Circuit in a Buick without fixing the underlying issue?

- While you can clear the code using an OBDII scanner, it is recommended to address the root cause of the problem to prevent it from recurring.

8. What are some preventative maintenance tips to avoid encountering the Cruise Control Multifunction Switch Circuit Low Voltage code in a Buick?

- Regularly inspecting the cruise control system components, checking for loose or damaged wiring, and addressing any issues promptly can help prevent this code from appearing.