AutoCodes – Cadillac – U3501 Cadillac

U3501 Cadillac 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 Cadillac 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 990

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

What does this mean?

What are the Possible Causes of the DTC U3501 Cadillac?

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 Cadillac?

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 Cadillac 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 U3501 Cadillac code?

Need more information on how to fix the U3501 Cadillac code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U3501 Cadillac 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 U3501 Cadillac Code

1. What are the common symptoms of OBDII code U3501 in a Cadillac related to Control Module Supply Circuit 1 Low Voltage?

- Common symptoms include illuminated Check Engine Light, rough engine performance, and potential stalling or starting issues.

2. What are the possible causes of OBDII code U3501 in a Cadillac?

- Possible causes may include a faulty control module, damaged wiring or connectors in the supply circuit, or issues with the power supply.

3. How can I diagnose OBDII code U3501 in my Cadillac?

- Diagnosis involves using a diagnostic scanner to retrieve the code, checking the control module and related components for damage, and testing the power supply circuit for proper voltage.

4. Can I drive my Cadillac with OBDII code U3501 present?

- It is not recommended to drive with this code present, as it can lead to potential engine performance issues and further damage if left unaddressed.

5. How can I repair OBDII code U3501 in my Cadillac?

- Repair may involve replacing the faulty control module, repairing damaged wiring or connectors, or addressing power supply issues as needed.

6. Are there any DIY tips for fixing OBDII code U3501 in a Cadillac?

- DIY tips include checking and cleaning the connectors, ensuring proper electrical connections, and following manufacturer-specific repair procedures.

7. What is the typical cost to repair OBDII code U3501 in a Cadillac?

- The repair cost can vary depending on the exact cause of the code, but it may range from a few hundred to over a thousand dollars for parts and labor.

8. Can resetting the OBDII code U3501 in my Cadillac make it go away permanently?

- Resetting the code may temporarily turn off the Check Engine Light, but if the underlying issue is not addressed, the code is likely to return.

9. Is it necessary to visit a dealership for OBDII code U3501 repairs in a Cadillac?

- While visiting a dealership is recommended for accurate diagnosis and repair, independent repair shops with experience in Cadillac vehicles can also address this code effectively.

10. How can I prevent OBDII code U3501 from recurring in my Cadillac?

- Regular maintenance, timely repairs of any related issues, and addressing electrical problems promptly can help prevent the recurrence of this code.