AutoCodes – GMC – U3501 GMC

U3501 GMC 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 GMC 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.

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Code Popularity 1,230

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

What does this mean?

What are the Possible Causes of the DTC U3501 GMC?

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 GMC?

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 GMC 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 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.