AutoCodes – Chevrolet – U3502 Chevrolet

U3502 Chevrolet 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 Chevrolet 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 1,023

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

What does this mean?

What are the Possible Causes of the DTC U3502 Chevrolet?

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 Chevrolet?

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 Chevrolet 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 Chevrolet code?

Need more information on how to fix the U3502 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U3502 Chevrolet 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 U3502 Chevrolet Code

1. What are the common symptoms of OBDII code U3502 in a Chevrolet related to Control Module Supply Circuit 1 High Voltage?

- Common symptoms include illuminated Check Engine Light, reduced engine performance, and potential electrical issues in the vehicle.

2. What are the possible causes of OBDII code U3502 in a Chevrolet?

- The code U3502 in a Chevrolet may be caused by a faulty control module, damaged wiring or connectors, a failed power supply, or a malfunctioning sensor.

3. How can I diagnose OBDII code U3502 in my Chevrolet?

- Diagnosis involves using an OBDII scanner to retrieve the code, inspecting the control module and related components, checking for damaged wiring, and testing the power supply circuit.

4. How can I repair OBDII code U3502 in my Chevrolet?

- Repair options include replacing the faulty control module, repairing or replacing damaged wiring or connectors, ensuring proper power supply, and addressing any underlying issues causing the high voltage.

5. Can I drive my Chevrolet with OBDII code U3502 present?

- It is not recommended to drive the vehicle with code U3502 present, as it can lead to further electrical problems or engine issues. It's best to address the code promptly.

6. Is it safe to clear OBDII code U3502 in my Chevrolet and see if it comes back?

- Clearing the code temporarily may turn off the Check Engine Light, but it won't fix the underlying issue. It's important to diagnose and repair the root cause of the code.

7. How much does it typically cost to fix OBDII code U3502 in a Chevrolet?

- The cost to fix code U3502 can vary depending on the specific cause and required repairs. It's recommended to consult with a professional mechanic for an accurate estimate.

8. Can a DIY enthusiast repair OBDII code U3502 in a Chevrolet?

- DIY repairs for code U3502 may be possible for those with experience in automotive electrical systems. However, it's crucial to have the necessary tools and knowledge to ensure a proper repair.

9. Will OBDII code U3502 cause damage to other vehicle components if left untreated?

- Ignoring code U3502 can potentially lead to damage in other vehicle components, as it indicates an issue with the control module supply circuit that can affect overall vehicle performance.

10. How long does it typically take to fix OBDII code U3502 in a Chevrolet?

- The repair time for code U3502 can vary based on the specific cause and complexity of the issue. Some repairs may be completed within a few hours, while others may take longer to diagnose and fix.