AutoCodes – Generic – U3014

U3014 Code - Control Module Input Power 4

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: U3014 indicates Control Module Input Power 4.
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 5,243

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 U3014 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 U3014 - Control Module Input Power 4 - AutoCodes.com — U3014 Code - Control Module Input Power 4

What does this mean?

What are the Possible Causes of the DTC U3014?

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

How to Fix the DTC U3014?

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 U3014 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 U3014 code?

Need more information on how to fix the U3014 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U3014 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

U3014 Buick — Control Module Input Power 4
U3014 Cadillac — Control Module Input Power 4
U3014 Chevrolet — Control Module Input Power 4
U3014 GMC — Control Module Input Power 4

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 U3014 Code

1. What does OBDII code U3014 indicate?

- OBDII code U3014 stands for "Control Module Input Power 4." It signals an issue with the input power to a specific control module in the vehicle.

2. What are common symptoms of OBDII code U3014?

- Common symptoms include electrical system malfunctions, dashboard warning lights, and issues with various vehicle functions controlled by the affected module.

3. What are possible causes of OBDII code U3014?

- Causes can include a faulty control module, damaged wiring or connectors, a blown fuse related to the module, or issues with the power supply to the module.

4. How can I diagnose OBDII code U3014?

- Diagnosis typically involves using a diagnostic scanner to read the code, checking the affected module and associated components for visible damage, and testing the power supply to the module.

5. Can I drive my vehicle with OBDII code U3014?

- It is generally not recommended to drive the vehicle with this code present, as it can lead to further electrical issues and potential safety hazards.

6. How do I repair OBDII code U3014?

- Repair involves addressing the root cause of the code, which may include replacing a faulty control module, repairing damaged wiring, ensuring proper power supply, and clearing the code with a diagnostic tool.

7. Is it safe to reset the OBDII code U3014 without fixing the underlying issue?

- Resetting the code without fixing the underlying problem is not recommended, as the issue will likely persist and could lead to more serious electrical problems in the vehicle.

8. Can a DIY enthusiast fix OBDII code U3014 at home?

- Depending on the cause of the code, some DIY enthusiasts with the necessary tools and knowledge of automotive electrical systems may be able to address the issue at home. However, complex electrical issues may require professional assistance.

9. Will OBDII code U3014 cause my vehicle to fail an emissions test?

- Yes, if the code is not addressed and the underlying issue is not resolved, it can affect the vehicle's emissions control system and cause it to fail an emissions test.

10. How can I prevent OBDII code U3014 from recurring?

- Regularly inspecting and maintaining the vehicle's electrical system, ensuring proper power supply to control modules, and addressing any warning signs promptly can help prevent the recurrence of this code.