AutoCodes – GMC – U1814 2014 GMC Sierra

U1814 2014 GMC Sierra Code - Powertrain Wake-Up Communication Circuit

Quick Answer

The Body Control Module (BCM) activates the ignition circuit, when the ignition key is in ACC, ON or START. Common causes include Faulty Body Control Module (BCM), Body Control Module harness is open or shorted, Body 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: U1814 2014 GMC Sierra indicates Powertrain Wake-Up Communication Circuit.
Common causes: Common causes include Faulty Body Control Module (BCM), Body Control Module harness is open or shorted, Body 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 228

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 Jul 21, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U1814 2014 GMC Sierra Description

The Body Control Module (BCM) activates the ignition circuit, when the ignition key is in ACC, ON or START. The ignition circuit wakes up the devices for serial data bus communication. The Diagnostic Trouble Code (DTC) will set when the BCM senses a short to ground on the ignition circuit.

OBDII Code U1814 2014 GMC Sierra - Powertrain Wake-Up Communication Circuit - AutoCodes.com — U1814 2014 GMC Sierra Code - Powertrain Wake-Up Communication Circuit

What does this mean?

What are the Possible Causes of the DTC U1814 2014 GMC Sierra?

Faulty Body Control Module (BCM)
Body Control Module harness is open or shorted
Body Control Module circuit poor electrical connection

How to Fix the DTC U1814 2014 GMC Sierra?

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 U1814 2014 GMC Sierra 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 U1814 2014 GMC Sierra code?

Need more information on how to fix the U1814 2014 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U1814 2014 GMC Sierra 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 U1814 2014 GMC Sierra Code

1. What does the OBDII code U1814 for a 2014 GMC Sierra mean?

The U1814 code specifically relates to the Powertrain Wake-Up Communication Circuit in the vehicle.

2. What are the common symptoms associated with the U1814 code?

Common symptoms include the check engine light coming on, poor engine performance, and potential issues with the vehicle's transmission.

3. What are the possible causes of the U1814 code in a 2014 GMC Sierra?

Possible causes of the U1814 code include faulty wiring or connections in the wake-up communication circuit, a malfunctioning control module, or a software issue.

4. How can I diagnose the U1814 code on my 2014 GMC Sierra?

Diagnosing the U1814 code typically involves using an OBDII scanner to retrieve the code and then inspecting the wake-up communication circuit for any visible damage or issues.

5. Can I still drive my GMC Sierra with the U1814 code present?

It is not recommended to drive the vehicle with the U1814 code present, as it can lead to further damage and potential safety hazards. It's best to address the issue promptly.

6. How do I repair the U1814 code on my 2014 GMC Sierra?

Repairing the U1814 code may involve fixing any damaged wiring or connections in the wake-up communication circuit, replacing a faulty control module, or updating the vehicle's software.

7. Is it possible to reset the U1814 code on my GMC Sierra without fixing the underlying issue?

While you can temporarily clear the code with an OBDII scanner, it is crucial to address the root cause of the U1814 code to prevent it from reoccurring.

8. Can a DIY enthusiast fix the U1814 code on a 2014 GMC Sierra?

Depending on your skills and experience, you may be able to address the U1814 code yourself by inspecting and repairing the wake-up communication circuit. However, professional assistance may be necessary for more complex issues.

9. How much does it cost to repair the U1814 code on a 2014 GMC Sierra?

The cost of repairing the U1814 code can vary depending on the specific cause of the issue and whether you choose to address it yourself or seek help from a professional mechanic.

10. How long does it typically take to repair the U1814 code on a GMC Sierra?

The repair time for the U1814 code can vary based on the complexity of the issue and the extent of the repairs needed. It may take anywhere from a few hours to a day or more to fully address the problem.