AutoCodes – Chevrolet – U1814 2018 Chevrolet Silverado

U1814 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado 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 285

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 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado - Powertrain Wake-Up Communication Circuit - AutoCodes.com — U1814 2018 Chevrolet Silverado Code - Powertrain Wake-Up Communication Circuit

What does this mean?

What are the Possible Causes of the DTC U1814 2018 Chevrolet Silverado?

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 2018 Chevrolet Silverado?

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 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado code?

Need more information on how to fix the U1814 2018 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U1814 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code U1814 in a 2018 Chevrolet Silverado?

- Common symptoms include the check engine light coming on, issues with starting the vehicle, and potential loss of communication between control modules.

2. What does the OBDII code U1814 indicate in a 2018 Chevrolet Silverado?

- The code U1814 indicates a problem with the Powertrain Wake-Up Communication Circuit in the vehicle.

3. What are the possible causes of OBDII code U1814 in a 2018 Chevrolet Silverado?

- Possible causes include a faulty Wake-Up Communication Circuit, damaged wiring or connectors, issues with control modules, or software glitches.

4. How can I diagnose the Powertrain Wake-Up Communication Circuit issue related to code U1814 in my 2018 Chevrolet Silverado?

- Diagnosing the issue may involve checking the wiring and connectors for damage, ensuring proper connection of control modules, and using a diagnostic scanner to pinpoint the exact problem.

5. Can I continue driving my 2018 Chevrolet Silverado with OBDII code U1814 present?

- It is not recommended to continue driving the vehicle with the code present, as it may lead to further electrical or communication issues within the vehicle.

6. How can I reset the OBDII code U1814 in my 2018 Chevrolet Silverado?

- Resetting the code may involve using an OBDII scanner to clear the code after addressing the underlying issue with the Powertrain Wake-Up Communication Circuit.

7. Is it possible to repair OBDII code U1814 in a 2018 Chevrolet Silverado at home?

- Depending on the exact cause of the code, some repairs related to the Powertrain Wake-Up Communication Circuit can be done at home if you have the necessary tools and expertise.

8. Will OBDII code U1814 in a 2018 Chevrolet Silverado affect the vehicle's performance?

- The code U1814 may affect the vehicle's performance by causing communication errors between control modules, potentially leading to starting issues or other problems.

9. How long does it typically take to repair OBDII code U1814 in a 2018 Chevrolet Silverado?

- The repair time for OBDII code U1814 can vary depending on the exact cause of the issue, but it may take a few hours to a full day to diagnose and fix the problem.

10. Are there any recalls or service bulletins related to OBDII code U1814 in the 2018 Chevrolet Silverado?

- It's recommended to check with a Chevrolet dealership or the manufacturer's website to see if there are any recalls or service bulletins related to code U1814 and the Powertrain Wake-Up Communication Circuit in the 2018 Silverado.