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Engine-Codes – GMC – U3501 GMC

U3501 GMC Code - Control Module Supply Circuit 1 Low Voltage

Quick Answer

The U3501 GMC code indicates that there is a low voltage condition in Control Module Supply Circuit 1. Common causes include Faulty control module, Loose or corroded wiring connections, Blown fuse in the control module supply circuit. 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 GMC indicates Control Module Supply Circuit 1 Low Voltage.
Common causes
Common causes include Faulty control module, Loose or corroded wiring connections, Blown fuse in the control module supply circuit.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 06, 2024
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Code U3501 GMC Description

The U3501 GMC code indicates that there is a low voltage condition in Control Module Supply Circuit 1. This control module is responsible for providing power to various systems within the vehicle, such as the engine control module, transmission control module, and other critical components. When the voltage in this circuit is low, it can lead to issues with the proper functioning of these systems, potentially causing performance issues and even safety concerns.

OBDII Code U3501 GMC - Control Module Supply Circuit 1 Low Voltage
U3501 GMC Code - Control Module Supply Circuit 1 Low Voltage

Common Causes of U3501 GMC

  1. Faulty control module
  2. Loose or corroded wiring connections
  3. Blown fuse in the control module supply circuit
  4. Electrical system issues
  5. Battery voltage too low

Symptoms of U3501 GMC

  1. Check engine light illuminated on the dashboard
  2. Engine running rough or misfiring
  3. Transmission shifting erratically
  4. Loss of power while driving
  5. Difficulty starting the vehicle

How to Fix U3501 GMC

  1. Perform a thorough inspection of the control module supply circuit and wiring connections.
  2. Test the battery voltage and charging system to ensure proper power supply.
  3. Replace any blown fuses in the circuit.
  4. Check for any software updates or reprogramming needed for the control module.
  5. If necessary, replace the control module with a new one.

Cost to Fix U3501 GMC

The cost of repairing the Control Module Supply Circuit 1 Low Voltage issue can vary depending on the specific cause of the problem and the labor rates in your area. On average, you can expect to pay anywhere from $150 to $500 for parts and labor. Keep in mind that additional diagnostic time may be needed to pinpoint the exact cause of the low voltage condition. It's best to consult with a professional mechanic to get an accurate estimate for your particular vehicle.

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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 U3501 GMC Code

1. What are the common symptoms of OBDII code U3501 GMC?

- Common symptoms include engine stalling, rough idling, poor performance, and issues with starting the vehicle.

2. What does the OBDII code U3501 GMC indicate?

- The code U3501 indicates a low voltage condition in Control Module Supply Circuit 1 of the vehicle.

3. What are the possible causes of OBDII code U3501 GMC?

- Possible causes include a faulty control module, damaged wiring or connectors, low battery voltage, or issues with the power supply to the control module.

4. How can I diagnose the OBDII code U3501 GMC?

- Diagnosis involves checking the voltage levels at the control module, inspecting the wiring and connectors for damage, and testing the battery voltage and charging system.

5. What are some repair tips for fixing OBDII code U3501 GMC?

- Repair tips may include repairing or replacing damaged wiring, repairing faulty connectors, ensuring proper battery voltage, and replacing the control module if necessary.

6. Can I drive my vehicle with OBDII code U3501 GMC?

- It is not recommended to drive the vehicle with this code present as it may lead to further damage and unsafe driving conditions.

7. How much does it typically cost to repair OBDII code U3501 GMC?

- The cost of repair can vary depending on the exact cause of the issue, but it may range from a few hundred to a few thousand dollars.

8. Will resetting the OBDII code U3501 GMC make it go away permanently?

- Resetting the code may temporarily clear the warning light, but if the underlying issue is not addressed, the code is likely to reappear.

9. Is it possible to prevent OBDII code U3501 GMC from occurring again in the future?

- Regular vehicle maintenance, checking the battery voltage, and addressing any electrical issues promptly can help prevent this code from reoccurring.

10. Can I fix OBDII code U3501 GMC on my own, or do I need to take it to a mechanic?

- Depending on your skills and experience with automotive repair, you may be able to diagnose and fix this code on your own. However, it is recommended to seek professional help if you are unsure.

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