AutoCodes – Chevrolet – U3506 Chevrolet

U3506 Chevrolet Code - Control Module Supply Circuit 2 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
U3506 Chevrolet indicates Control Module Supply Circuit 2 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 653
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jun 18, 2020
πŸ’¬ Need more help? Ask Coddy for instant answers β€” it's free!

Code U3506 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 U3506 Chevrolet - Control Module Supply Circuit 2 High Voltage - AutoCodes.com
U3506 Chevrolet Code - Control Module Supply Circuit 2 High Voltage

What are the Possible Causes of the DTC U3506 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 U3506 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 U3506 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 U3506 Chevrolet code?

Need more information on how to fix the U3506 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U3506 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 U3506 Chevrolet Code

1. What are the common symptoms of OBDII code U3506 in a Chevrolet, indicating an issue with Control Module Supply Circuit 2 High Voltage?

The common symptoms include the Check Engine light illuminating on the dashboard, decreased fuel efficiency, and potential drivability issues like rough idling or hesitation during acceleration.

2. What could cause the OBDII code U3506 to be triggered in a Chevrolet, related to Control Module Supply Circuit 2 High Voltage?

Possible causes include a faulty control module, damaged wiring or connectors in the circuit, an issue with the power supply, or a problem with the ground connection.

3. How can I diagnose the OBDII code U3506 in my Chevrolet to pinpoint the exact issue with Control Module Supply Circuit 2 High Voltage?

You can use a diagnostic scanner to read the trouble codes and perform a thorough inspection of the control module, wiring, connectors, and power supply components to identify any visible damage or issues.

4. What are some repair tips for resolving OBDII code U3506 in a Chevrolet related to Control Module Supply Circuit 2 High Voltage?

Repair tips may include checking and repairing any damaged wiring or connectors, ensuring a secure connection to the control module, verifying proper power supply, and potentially replacing the control module if it is found to be faulty.

5. Can I continue driving my Chevrolet with the OBDII code U3506 present, indicating an issue with Control Module Supply Circuit 2 High Voltage?

It is generally not recommended to continue driving with this code present, as it can lead to further damage to the vehicle and potentially affect its performance. It is best to address the issue promptly.

6. How serious is the OBDII code U3506 in a Chevrolet related to Control Module Supply Circuit 2 High Voltage?

While the severity can vary depending on the root cause, it is important to address this code promptly to prevent potential damage to other components and ensure the vehicle operates correctly.

7. Is it possible to reset the OBDII code U3506 in a Chevrolet without addressing the underlying issue with Control Module Supply Circuit 2 High Voltage?

Resetting the code without fixing the root cause will only temporarily clear the Check Engine light. The code is likely to reappear if the underlying issue is not resolved.

8. Can a DIY enthusiast with basic automotive knowledge repair the OBDII code U3506 in a Chevrolet related to Control Module Supply Circuit 2 High Voltage?

Depending on the specific cause, some DIY repairs may be possible, such as checking and repairing wiring or connectors. However, more complex issues may require professional assistance.

9. How much can I expect to pay for repairing the OBDII code U3506 in a Chevrolet related to Control Module Supply Circuit 2 High Voltage?

The cost of repair can vary widely depending on the root cause, the extent of the damage, and whether professional labor is required. It is advisable to obtain quotes from reputable mechanics.

10. Are there any preventive measures I can take to avoid encountering the OBDII code U3506 in a Chevrolet related to Control Module Supply Circuit 2 High Voltage in the future?

Regular vehicle maintenance, including inspecting wiring and connectors, ensuring proper power supply connections, and promptly addressing any related issues, can help prevent this code from appearing.

Discuss the causes and fixes for U3506 Chevrolet OBDII Code

Code U3506 Chevrolet comments

No comments found for this page.

AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play