AutoCodes – Chevrolet – U179A 2015 Chevrolet Silverado

U179A 2015 Chevrolet Silverado Code - Lost Communication with Hybrid/EV Powertrain Control Module 2

Quick Answer

The serial data circuit is the means by which the devices in the vehicle communicate with each other. Common causes include Faulty Hybrid/EV Powertrain Control Module 2, Hybrid/EV Powertrain Control Module 2 harness is open or shorted, Hybrid/EV Powertrain Control Module 2 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: U179A 2015 Chevrolet Silverado indicates Lost Communication with Hybrid/EV Powertrain Control Module 2.
Common causes: Common causes include Faulty Hybrid/EV Powertrain Control Module 2, Hybrid/EV Powertrain Control Module 2 harness is open or shorted, Hybrid/EV Powertrain Control Module 2 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 197

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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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 U179A 2015 Chevrolet Silverado Description

The serial data circuit is the means by which the devices in the vehicle communicate with each other. Once the scan tool is connected to the serial data circuit through the Data Link Connector (DLC), the scan tool can be used to monitor each device for diagnostic purposes and to check for Diagnostic Trouble Codes (DTC). When the vehicle is ON, each device communicating on the serial data circuit sends a state of health message to ensure that the device is operating properly. When a device stops communicating on the serial data circuit, for example, if the device loses power or ground, the state of health message it normally sends on the serial data circuit disappears. Other devices on the serial data circuit, which expect to receive that state of health message, detect its absence; those devices in turn set a DTC associated with the loss of state of health of the non-communicating device. A loss of serial data communications DTC does not represent a failure of the devices that contain the stored DTC.

OBDII Code U179A 2015 Chevrolet Silverado - Lost Communication with Hybrid/EV Powertrain Control Module 2 - AutoCodes.com — U179A 2015 Chevrolet Silverado Code - Lost Communication with Hybrid/EV Powertrain Control Module 2

What does this mean?

What are the Possible Causes of the DTC U179A 2015 Chevrolet Silverado?

Faulty Hybrid/EV Powertrain Control Module 2
Hybrid/EV Powertrain Control Module 2 harness is open or shorted
Hybrid/EV Powertrain Control Module 2 circuit poor electrical connection

How to Fix the DTC U179A 2015 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 U179A 2015 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 U179A 2015 Chevrolet Silverado code?

Need more information on how to fix the U179A 2015 Chevrolet Silverado code? Get Access to Factory Service Manuals

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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 U179A 2015 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code U179A in a 2015 Chevrolet Silverado?

- Common symptoms include the check engine light illuminating, loss of communication with the hybrid/EV powertrain control module 2, and potential drivability issues.

2. What can cause the OBDII code U179A to trigger in a 2015 Chevrolet Silverado?

- The code U179A is typically triggered by a communication error between the vehicle's onboard diagnostic system and the hybrid/EV powertrain control module 2.

3. How serious is the OBDII code U179A in a 2015 Chevrolet Silverado?

- While the code itself may not directly affect the drivability of the vehicle, it is important to address communication issues to ensure proper operation of the hybrid/EV powertrain system.

4. What are some possible DIY repair tips for resolving code U179A in a 2015 Chevrolet Silverado?

- DIY repair tips include checking for loose or damaged wiring/connectors, ensuring proper battery voltage, and resetting the fault codes to see if the issue clears.

5. Can a faulty battery or charging system cause code U179A in a 2015 Chevrolet Silverado?

- Yes, a weak or failing battery, as well as issues with the charging system, can lead to communication errors and trigger code U179A in the Silverado.

6. Is it safe to continue driving a 2015 Chevrolet Silverado with code U179A present?

- It is generally safe to drive the vehicle with the code present, but it is recommended to address the issue promptly to prevent potential complications with the hybrid/EV powertrain system.

7. How can a professional mechanic diagnose and repair code U179A in a 2015 Chevrolet Silverado?

- A professional mechanic can use specialized diagnostic tools to pinpoint the communication issue, perform thorough electrical testing, and repair or replace any faulty components as needed.

8. Are there any recalls or technical service bulletins related to code U179A in a 2015 Chevrolet Silverado?

- It's recommended to check with an authorized Chevrolet dealership or visit the National Highway Traffic Safety Administration website for any related recalls or technical service bulletins.

9. Can extreme weather conditions affect the occurrence of code U179A in a 2015 Chevrolet Silverado?

- Extreme weather conditions, such as extreme cold or heat, can potentially impact the electrical connections and components, leading to communication errors and triggering code U179A.

10. How can regular maintenance help prevent the recurrence of code U179A in a 2015 Chevrolet Silverado?

- Regular maintenance, including checking and cleaning electrical connections, inspecting wiring harnesses, and ensuring the battery is in good condition, can help prevent communication issues and the recurrence of code U179A.