AutoCodes – Cadillac – U3504 Cadillac

U3504 Cadillac Code - Control Module Input Power 'B' Circuit Range/Performance

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: U3504 Cadillac indicates Control Module Input Power 'B' Circuit Range/Performance.
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 709

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 U3504 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 U3504 Cadillac - Control Module Input Power 'B' Circuit Range/Performance - AutoCodes.com — U3504 Cadillac Code - Control Module Input Power 'B' Circuit Range/Performance

What does this mean?

What are the Possible Causes of the DTC U3504 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 U3504 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 U3504 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 U3504 Cadillac code?

Need more information on how to fix the U3504 Cadillac code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U3504 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 U3504 Cadillac Code

1. What are the common symptoms of OBDII code U3504 in a Cadillac?

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

2. What can cause the OBDII code U3504 in a Cadillac?

- The code U3504 can be triggered by issues such as a faulty control module, wiring problems, or a weak power supply to the control module.

3. How do I diagnose the Control Module Input Power 'B' Circuit Range/Performance issue in my Cadillac?

- Use a OBDII scanner to retrieve the specific trouble code. Then, inspect the wiring and connections related to the control module for any damage or loose connections.

4. Can a weak battery or alternator cause the U3504 code in a Cadillac?

- Yes, a weak battery or alternator can cause voltage fluctuations that may trigger the U3504 code related to the control module input power.

5. What are some repair tips for fixing the U3504 code in a Cadillac?

- Start by checking the battery and alternator to ensure they are functioning properly. Then, inspect the wiring harness and connectors for any signs of damage or corrosion.

6. Is it safe to continue driving my Cadillac with the U3504 trouble code?

- It is not recommended to drive your Cadillac with the U3504 code present, as it can lead to potential drivability issues and further damage to the vehicle.

7. Can a DIY enthusiast fix the U3504 code issue in a Cadillac?

- Depending on your skill level and access to tools, you may be able to fix the U3504 code yourself by addressing common causes like wiring issues or power supply problems.

8. How much does it cost to repair the U3504 code in a Cadillac at a dealership?

- The cost of repairs for the U3504 code at a dealership can vary but may include diagnostics fees, replacement parts, and labor costs, which can add up to a few hundred dollars.

9. Will resetting the trouble codes make the U3504 code disappear permanently?

- Resetting the trouble codes may temporarily clear the U3504 code, but if the underlying issue is not addressed, the code is likely to reappear once the problem persists.

10. Can a mechanic perform a software update to resolve the U3504 code in my Cadillac?

- In some cases, a mechanic may be able to perform a software update to address the U3504 code, especially if it is related to control module programming issues.