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U179A Chevrolet Code - Lost Communication with Hybrid/EV Powertrain Control Module 2

Quick Answer

The U179A code for Chevrolet vehicles indicates that there is a communication problem between the vehicle's onboard computer system and the Hybrid/EV Powertrain Control Module 2. Common causes include Faulty wiring or connectors, Malfunctioning Hybrid/EV Powertrain Control Module 2, Issues with the vehicle's onboard computer system. 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
U179A Chevrolet indicates Lost Communication with Hybrid/EV Powertrain Control Module 2.
Common causes
Common causes include Faulty wiring or connectors, Malfunctioning Hybrid/EV Powertrain Control Module 2, Issues with the vehicle's onboard computer system.
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 28, 2024
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Code U179A Chevrolet Description

The U179A code for Chevrolet vehicles indicates that there is a communication problem between the vehicle's onboard computer system and the Hybrid/EV Powertrain Control Module 2. This module is responsible for managing the hybrid or electric powertrain components in the vehicle. When communication is lost with this module, it can lead to various performance issues and potentially affect the overall drivability of the vehicle.

OBDII Code U179A Chevrolet - Lost Communication with Hybrid/EV Powertrain Control Module 2
U179A Chevrolet Code - Lost Communication with Hybrid/EV Powertrain Control Module 2

Common Causes of U179A Chevrolet

  1. Faulty wiring or connectors
  2. Malfunctioning Hybrid/EV Powertrain Control Module 2
  3. Issues with the vehicle's onboard computer system
  4. Electrical interference or signal disruption
  5. Water damage or corrosion in the electrical components

Symptoms of U179A Chevrolet

  1. Reduced power or acceleration
  2. Poor fuel efficiency
  3. Hesitation during acceleration
  4. Stalling or rough idling
  5. Warning lights illuminated on the dashboard

How to Fix U179A Chevrolet

  1. Perform a thorough diagnostic scan to retrieve the trouble codes and pinpoint the communication issue with the Hybrid/EV Powertrain Control Module 2.
  2. Inspect the wiring and connectors related to the Hybrid/EV Powertrain Control Module 2 for any damage or corrosion. Repair or replace as needed.
  3. Test the Hybrid/EV Powertrain Control Module 2 for proper functionality and communication. Replace if found to be faulty.
  4. Clear the trouble codes from the vehicle's computer system and perform a test drive to ensure the issue has been resolved.
  5. If the problem persists, further diagnostics may be required to identify any underlying issues with the vehicle's electrical system.

Cost to Fix U179A Chevrolet

The typical repair costs for addressing a U179A code related to lost communication with the Hybrid/EV Powertrain Control Module 2 can vary depending on the specific cause of the issue. In general, the cost of parts such as wiring, connectors, or a new Hybrid/EV Powertrain Control Module 2 can range from $200 to $800. Labor costs at auto repair shops typically range from $80 to $150 per hour, with the total repair time varying based on the complexity of the issue.

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Information for Specific Chevrolet Models

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 U179A Chevrolet Code

1. What does the OBDII code U179A mean on a Chevrolet?

The U179A code indicates a "Lost Communication with Hybrid/EV Powertrain Control Module 2," meaning the vehicle's systems are unable to communicate with this specific control module.

2. What are the common symptoms of the U179A code?

Symptoms can include a check engine light, reduced power mode, poor acceleration, hybrid/EV system malfunctions, or the vehicle failing to start.

3. What causes the U179A code to appear?

Common causes include faulty wiring or connectors, a malfunctioning Hybrid/EV Powertrain Control Module 2, software glitches, or issues with the CAN (Controller Area Network) communication bus.

4. Can the U179A code cause drivability issues?

Yes, it can lead to reduced performance, limited electric drive functionality, or a complete failure of the hybrid/EV system.

5. How can I diagnose the U179A code on my Chevrolet?

A professional scan tool can be used to check for related codes, verify module communication, and inspect wiring and connectors for damage or corrosion.

6. Can a weak or failing battery cause the U179A code?

Yes, a weak 12V battery or issues with the high-voltage battery system can disrupt module communication and trigger this code.

7. How much does it cost to repair the U179A code?

Repair costs vary depending on the cause but can range from $150 for wiring fixes to over $1,000 for module replacement, plus labor.

8. Can I drive my Chevrolet with the U179A code?

Driving is generally not recommended, as the code could cause reduced performance or additional system failures, particularly in hybrid or EV systems.

9. How do I fix the U179A code?

Repairs may involve inspecting and repairing wiring, replacing faulty connectors, reprogramming the control module, or replacing the Hybrid/EV Powertrain Control Module 2.

10. Do I need to reprogram the module to fix the U179A code?

In some cases, reprogramming or updating the software for the Hybrid/EV Powertrain Control Module 2 may resolve the issue. Consult with a certified technician to confirm.

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