AutoCodes – GMC – U3502 GMC

U3502 GMC Code - Control Module Supply Circuit 1 High 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: U3502 GMC indicates Control Module Supply Circuit 1 High 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 748

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 U3502 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 U3502 GMC - Control Module Supply Circuit 1 High Voltage - AutoCodes.com — U3502 GMC Code - Control Module Supply Circuit 1 High Voltage

What does this mean?

What are the Possible Causes of the DTC U3502 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 U3502 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 U3502 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.

Need more information about the U3502 GMC code?

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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 U3502 GMC Code

1. What are common symptoms of OBDII code U3502 GMC?

- Common symptoms include illuminated check engine light, reduced engine performance, and potential stalling or rough idling.

2. What can cause the OBDII code U3502 GMC to trigger?

- This code may be triggered by a faulty control module, issues with the power supply circuit, or damaged wiring.

3. How serious is the U3502 GMC code?

- The code should not be ignored as it can impact the performance and reliability of the vehicle. It is recommended to address the issue promptly.

4. How can I diagnose the U3502 GMC code?

- Diagnosing the code typically involves using a professional OBDII scanner to retrieve the specific fault codes and conducting a thorough inspection of the control module and related components.

5. Can I drive my vehicle with the U3502 GMC code?

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

6. What are some repair tips for fixing the U3502 GMC code?

- Repair tips include checking and repairing any damaged wiring, inspecting the control module for faults, and ensuring proper power supply to the module.

7. How much does it cost to repair the U3502 GMC code?

- The cost of repairs can vary depending on the underlying issue causing the code. It is advisable to consult a professional mechanic for an accurate diagnosis and cost estimate.

8. Can a DIY enthusiast fix the U3502 GMC code?

- While some DIY enthusiasts may be able to address simple issues related to the code, it is recommended to seek professional help for accurate diagnosis and repair to ensure the problem is resolved effectively.

9. Will resetting the code make it go away permanently?

- Simply resetting the code will not fix the underlying issue causing it. It is important to diagnose and address the root cause of the problem to prevent the code from reoccurring.

10. Is the U3502 GMC code specific to certain GMC models?

- This code is specific to GMC vehicles and may vary slightly in its definition and impact across different models and years.