AutoCodes – Buick – U3505 Buick

U3505 Buick Code - Control Module Supply Circuit 2 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: U3505 Buick indicates Control Module Supply Circuit 2 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 756

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 U3505 Buick 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 U3505 Buick - Control Module Supply Circuit 2 Low Voltage - AutoCodes.com — U3505 Buick Code - Control Module Supply Circuit 2 Low Voltage

What does this mean?

What are the Possible Causes of the DTC U3505 Buick?

Faulty Control Module setting the code
Control Module harness is open or shorted
Control Module circuit poor electrical connection

How to Fix the DTC U3505 Buick?

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 U3505 Buick 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 U3505 Buick code?

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Need Help with the 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 U3505 Buick Code

1. What are common symptoms of OBDII code U3505 in a Buick related to the Control Module Supply Circuit 2 Low Voltage?

- Common symptoms include engine stalling, rough idling, poor acceleration, and the illumination of the Check Engine Light.

2. What are some potential causes of the U3505 OBDII code in a Buick?

- Possible causes include a faulty control module, damaged wiring or connectors, a weak battery, or a malfunctioning power supply.

3. How can I diagnose the U3505 code related to the Control Module Supply Circuit 2 Low Voltage in my Buick?

- Diagnosing this code typically involves using a diagnostic scanner to retrieve the trouble codes, inspecting the wiring and connectors for damage, and testing the control module and power supply components.

4. Can a weak car battery cause the U3505 code to appear in a Buick?

- Yes, a weak or failing car battery can lead to low voltage issues that trigger the U3505 code related to the Control Module Supply Circuit 2.

5. Are there any quick repair tips for fixing the U3505 code in a Buick?

- Quick repair tips include checking and tightening any loose wiring connections, ensuring the battery is in good condition, and resetting the trouble codes to see if the issue clears.

6. Is it safe to continue driving my Buick with the U3505 code present?

- It is not recommended to drive your Buick with the U3505 code active, as it can lead to performance issues and potentially cause further damage to the vehicle's control modules.

7. How much does it typically cost to repair the U3505 code in a Buick at a mechanic or dealership?

- Repair costs can vary depending on the exact cause of the issue, but expect to pay anywhere from $100 to $500 for diagnosis and repair of the Control Module Supply Circuit 2 Low Voltage problem.

8. Can I reset the U3505 code in my Buick using an OBDII scanner?

- Yes, you can use an OBDII scanner to reset the trouble codes associated with the U3505 error after addressing the underlying issue causing the low voltage condition.

9. Will the U3505 code disappear on its own if the underlying issue is resolved in a Buick?

- In some cases, once the underlying issue causing the low voltage condition is fixed, driving the vehicle for a few cycles may allow the system to clear the U3505 code on its own.

10. How important is it to address the U3505 code in a Buick promptly?

- It is important to address the U3505 code promptly to prevent potential damage to the vehicle's control modules and ensure optimal performance and fuel efficiency.