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U1814 2018 Chevrolet Silverado Code - Powertrain Wake-Up Communication Circuit

Quick Answer

The U1814 diagnostic trouble code (DTC) for a 2018 Chevrolet Silverado relates to the Powertrain Wake-Up Communication Circuit. Common causes include Faulty powertrain control module (PCM), Wiring or connection issues between the PCM and other modules, Software glitches or programming errors. 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 powertrain control module (PCM), Wiring or connection issues between the PCM and other modules, Software glitches or programming errors.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 16, 2024
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Code U1814 2018 Chevrolet Silverado Description

The U1814 diagnostic trouble code (DTC) for a 2018 Chevrolet Silverado relates to the Powertrain Wake-Up Communication Circuit. This code indicates a communication issue within the powertrain control module (PCM) or between the PCM and other modules in the vehicle. The powertrain control module is responsible for managing various engine and transmission functions, as well as communication with other control modules in the vehicle. When the PCM cannot establish communication with other modules upon waking up from sleep mode, the U1814 code is triggered.

OBDII Code U1814 2018 Chevrolet Silverado - Powertrain Wake-Up Communication Circuit
U1814 2018 Chevrolet Silverado Code - Powertrain Wake-Up Communication Circuit

Common Causes of U1814 2018 Chevrolet Silverado

  1. Faulty powertrain control module (PCM)
  2. Wiring or connection issues between the PCM and other modules
  3. Software glitches or programming errors
  4. Electrical interference or short circuits
  5. Module communication bus malfunctions

Symptoms of U1814 2018 Chevrolet Silverado

  1. Check engine light illuminated
  2. Engine stalling or rough idling
  3. Transmission shifting issues
  4. Reduced fuel efficiency
  5. Vehicle not starting

How to Fix U1814 2018 Chevrolet Silverado

  1. Perform a thorough diagnostic scan to confirm the U1814 code and identify any other related codes.
  2. Inspect the wiring harness and connectors for any signs of damage or corrosion. Repair or replace as necessary.
  3. Check for software updates or reprogramming available from the manufacturer to address communication issues.
  4. Test the powertrain control module for proper functionality and replace if deemed faulty.
  5. Clear the DTCs, reset the PCM, and perform a road test to ensure the issue has been resolved.

Cost to Fix U1814 2018 Chevrolet Silverado

The cost of repairing a U1814 code on a 2018 Chevrolet Silverado can vary depending on the specific cause of the issue. In general, the cost of parts for this repair can range from $100 to $500, with labor costs adding an additional $100 to $300. Overall, the total repair cost may fall between $200 and $800. It's important to note that diagnosis time and labor rates can vary, so it's advisable to check with local auto repair shops for a more accurate estimate.

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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.

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