AutoCodes – Buick – U3501 Buick

U3501 Buick Code - Control Module Supply Circuit 1 Low Voltage

Quick Answer

The vehicle control modules or sensors monitor the system voltage to verify the system voltage is within the normal operating range. Common causes include Faulty Control Module setting the code, Control Module harness is open or shorted, Control Module 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: U3501 Buick indicates Control Module Supply Circuit 1 Low Voltage.
Common causes: Common causes include Faulty Control Module setting the code, Control Module harness is open or shorted, Control Module 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 969

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 Jun 18, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code U3501 Buick Description

The vehicle control modules or sensors monitor the system voltage to verify the system voltage is within the normal operating range. With the ignition is ON, the Diagnostic Trouble Code (DTC) will set when the control module or sensor detects a system voltage of less than approximately 9 V for approximately 5 s.

OBDII Code U3501 Buick - Control Module Supply Circuit 1 Low Voltage - AutoCodes.com — U3501 Buick Code - Control Module Supply Circuit 1 Low Voltage

What does this mean?

What are the Possible Causes of the DTC U3501 Buick?

Faulty Control Module setting the code
Control Module harness is open or shorted
Control Module circuit poor electrical connection

How to Fix the DTC U3501 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 U3501 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.

Need more information about the U3501 Buick code?

Need more information on how to fix the U3501 Buick code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U3501 Buick code diagnosed by a professional: Find a repair shop in your area

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 U3501 Buick Code

1. What are the common symptoms of OBDII code U3501 in a Buick?

- Common symptoms include the check engine light being illuminated, poor engine performance, and potential issues with the vehicle's electrical systems.

2. What does OBDII code U3501 indicating "Control Module Supply Circuit 1 Low Voltage" mean for a Buick?

- This code indicates that the control module is detecting a low voltage condition in Circuit 1, which can lead to various electrical issues within the vehicle.

3. What are the possible causes of OBDII code U3501 in a Buick?

- Possible causes include a faulty control module, damaged wiring or connectors in Circuit 1, a weak battery, or issues with the vehicle's charging system.

4. How serious is OBDII code U3501 in a Buick?

- This code should be addressed promptly as it can lead to electrical malfunctions and potentially affect the overall performance and safety of the vehicle.

5. Can I still drive my Buick with OBDII code U3501?

- It is not recommended to drive the vehicle with this code present, as it can lead to further electrical issues or potential breakdowns.

6. How can I diagnose OBDII code U3501 in my Buick?

- Diagnosis typically involves using a diagnostic scanner to read the code, checking the voltage levels in Circuit 1, inspecting wiring and connectors, and testing the control module.

7. How can I repair OBDII code U3501 in my Buick?

- Repair options may include replacing the control module, repairing or replacing damaged wiring or connectors, testing and potentially replacing the battery, and ensuring the charging system is functioning properly.

8. Can a DIY enthusiast fix OBDII code U3501 in a Buick?

- While some basic troubleshooting steps can be performed by a DIY enthusiast, addressing this code often requires advanced diagnostic tools and technical knowledge, so it may be best to seek professional help.

9. How much does it cost to repair OBDII code U3501 in a Buick?

- The cost of repairs can vary depending on the exact cause of the issue, but it may involve parts and labor expenses that could range from a few hundred to over a thousand dollars.

10. How can I prevent OBDII code U3501 from occurring in my Buick in the future?

- Regular maintenance, such as checking the vehicle's electrical system, keeping the battery in good condition, and addressing any warning signs promptly, can help prevent this code from occurring.