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U1803 2016 Chevrolet Silverado Code - Lost Communication with Hybrid/EV Powertrain Control Module 2

Quick Answer

The U1803 diagnostic trouble code (DTC) for a 2016 Chevrolet Silverado indicates that there is a communication issue with the Hybrid/EV Powertrain Control Module 2. Common causes include Loose or corroded wiring connections, Faulty Hybrid/EV Powertrain Control Module 2, Damaged communication lines between modules. 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
U1803 2016 Chevrolet Silverado indicates Lost Communication with Hybrid/EV Powertrain Control Module 2.
Common causes
Common causes include Loose or corroded wiring connections, Faulty Hybrid/EV Powertrain Control Module 2, Damaged communication lines between modules.
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 14, 2024
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Code U1803 2016 Chevrolet Silverado Description

The U1803 diagnostic trouble code (DTC) for a 2016 Chevrolet Silverado indicates that there is a communication issue with the Hybrid/EV Powertrain Control Module 2. This module is responsible for managing the hybrid or electric powertrain system in the vehicle. When communication is lost with this module, it can lead to a variety of performance issues and potentially affect the drivability of the vehicle.

OBDII Code U1803 2016 Chevrolet Silverado - Lost Communication with Hybrid/EV Powertrain Control Module 2
U1803 2016 Chevrolet Silverado Code - Lost Communication with Hybrid/EV Powertrain Control Module 2

Common Causes of U1803 2016 Chevrolet Silverado

  1. Loose or corroded wiring connections.
  2. Faulty Hybrid/EV Powertrain Control Module 2.
  3. Damaged communication lines between modules.
  4. Software glitches or programming issues.
  5. Electrical interference or signal disruption.

Symptoms of U1803 2016 Chevrolet Silverado

  1. Check engine light illuminated on the dashboard.
  2. Hybrid system warning light activated.
  3. Decreased fuel efficiency.
  4. Difficulty starting the vehicle.
  5. Inconsistent power output or acceleration.

How to Fix U1803 2016 Chevrolet Silverado

  1. Begin by conducting a thorough inspection of the wiring connections and communication lines to identify any loose or damaged components.
  2. Test the Hybrid/EV Powertrain Control Module 2 for functionality and potential faults using diagnostic equipment.
  3. Update the control module software to the latest version, if applicable.
  4. Repair or replace any faulty wiring connections, damaged communication lines, or malfunctioning control module.
  5. Clear the DTC and perform a test drive to ensure the issue has been resolved.

Cost to Fix U1803 2016 Chevrolet Silverado

The typical repair costs for addressing a U1803 code on a 2016 Chevrolet Silverado can range from $200 to $500, including parts and labor. However, it's important to note that specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Auto repair shops commonly charge between $80 and $150 per hour for labor, with rates potentially higher in metropolitan areas or at dealerships, and lower at independent shops. It's recommended to check local rates 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 U1803 2016 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code U1803 in a 2016 Chevrolet Silverado?

The common symptoms include the Check Engine Light illuminating, drivability issues, and the vehicle going into limp mode.

2. What does the OBDII code U1803 "Lost Communication with Hybrid/EV Powertrain Control Module 2" mean for a 2016 Chevrolet Silverado?

This code indicates a communication problem between the onboard diagnostic system and the Hybrid/EV Powertrain Control Module 2 in the vehicle.

3. What are the possible causes of the U1803 code in a 2016 Chevrolet Silverado?

Possible causes include damaged wiring or connectors, a faulty Hybrid/EV Powertrain Control Module 2, software issues, or a weak battery.

4. How can I diagnose the U1803 code in my 2016 Chevrolet Silverado?

Diagnosing the code may involve checking the wiring and connectors for damage, ensuring the battery is in good condition, and using diagnostic tools to communicate with the Hybrid/EV Powertrain Control Module 2.

5. Can I continue driving my 2016 Chevrolet Silverado with the U1803 code?

It is not recommended to drive the vehicle with the U1803 code present, as it can lead to drivability issues and potential safety concerns. It is best to address the issue promptly.

6. How can I reset the U1803 code in my 2016 Chevrolet Silverado?

Resetting the code may involve using an OBDII scanner to clear the code after addressing the underlying issue causing the communication problem.

7. Is the repair for the U1803 code in a 2016 Chevrolet Silverado costly?

The repair cost can vary depending on the exact cause of the communication problem. Simple fixes like repairing wiring may be less expensive compared to replacing the Hybrid/EV Powertrain Control Module 2.

8. Can a DIY enthusiast fix the U1803 code in a 2016 Chevrolet Silverado?

Some aspects of diagnosing and repairing the U1803 code may be within reach of experienced DIY enthusiasts, especially if the issue is related to wiring or connectors. However, complex repairs may require professional assistance.

9. How long does it typically take to repair the U1803 code in a 2016 Chevrolet Silverado?

The repair time can vary based on the specific cause of the code. Simple fixes may be completed relatively quickly, while more involved repairs could take longer, potentially requiring parts ordering and diagnostic time.

10. Is the U1803 code common in 2016 Chevrolet Silverado vehicles?

While the U1803 code may not be one of the most common OBDII codes, it can still occur in 2016 Chevrolet Silverado vehicles due to communication issues between the diagnostic system and the Hybrid/EV Powertrain Control Module 2.

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