U179A 2016 GMC Sierra Code - Lost Communication with Hybrid/EV Powertrain Control Module 2
Quick Answer
The U179A diagnostic trouble code (DTC) for a 2016 GMC Sierra indicates that there is a communication failure between the vehicle's onboard computer system and the Hybrid/EV Powertrain Control Module 2. Common causes include Faulty Wiring: Damaged or corroded wiring connections between the onboard computer system and the Hybrid/EV Powertrain Control Module 2 can lead to communication failures, Module Malfunction: A malfunctioning Hybrid/EV Powertrain Control Module 2 can cause communication issues and trigger the U179A code, Communication Line Damage: Damage to the communication lines connecting the onboard computer system and the control module can disrupt communication. 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 2016 GMC Sierra indicates Lost Communication with Hybrid/EV Powertrain Control Module 2.
- Common causes
- Common causes include Faulty Wiring: Damaged or corroded wiring connections between the onboard computer system and the Hybrid/EV Powertrain Control Module 2 can lead to communication failures, Module Malfunction: A malfunctioning Hybrid/EV Powertrain Control Module 2 can cause communication issues and trigger the U179A code, Communication Line Damage: Damage to the communication lines connecting the onboard computer system and the control module can disrupt communication.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code U179A 2016 GMC Sierra Description
The U179A diagnostic trouble code (DTC) for a 2016 GMC Sierra indicates that there is a communication failure between the vehicle's onboard computer system and the Hybrid/EV Powertrain Control Module 2. This module is responsible for managing the operation of the hybrid or electric powertrain components in the vehicle. When communication is lost with this module, it can lead to a variety of issues affecting the performance and efficiency of the hybrid or electric powertrain system.
Common Causes of U179A 2016 GMC Sierra
- Faulty Wiring: Damaged or corroded wiring connections between the onboard computer system and the Hybrid/EV Powertrain Control Module 2 can lead to communication failures.
- Module Malfunction: A malfunctioning Hybrid/EV Powertrain Control Module 2 can cause communication issues and trigger the U179A code.
- Communication Line Damage: Damage to the communication lines connecting the onboard computer system and the control module can disrupt communication.
- Software Issues: Software glitches or bugs within the vehicle's computer system can also lead to communication failures.
Symptoms of U179A 2016 GMC Sierra
- Check Engine Light: The most common symptom associated with the U179A code is the illumination of the check engine light on the vehicle's dashboard.
- Reduced Power: The vehicle may experience a decrease in power output, especially when utilizing the hybrid or electric powertrain components.
- Poor Fuel Efficiency: Communication issues with the Hybrid/EV Powertrain Control Module 2 can lead to decreased fuel efficiency and overall performance.
- Inability to Start: In severe cases, the vehicle may fail to start or experience difficulty starting due to the communication failure.
How to Fix U179A 2016 GMC Sierra
- Diagnose the Issue: Use a diagnostic scanner to retrieve the specific DTC and pinpoint the source of the communication failure.
- Inspect Wiring Connections: Check all wiring connections between the onboard computer system and the Hybrid/EV Powertrain Control Module 2 for damage or corrosion.
- Test Control Module: Test the Hybrid/EV Powertrain Control Module 2 to determine if it is functioning correctly or if it needs to be replaced.
- Repair or Replace Components: Repair any damaged wiring connections, replace the control module if necessary, and clear the DTC from the vehicle's computer system.
- Perform System Check: After repairs are completed, perform a system check to ensure that communication is restored and the vehicle's hybrid or electric powertrain system is functioning properly.
Cost to Fix U179A 2016 GMC Sierra
The typical repair costs for addressing the U179A code on a 2016 GMC Sierra can vary depending on the specific cause of the communication failure. In general, the cost of parts for replacing a control module or repairing wiring connections can range from $200 to $800. Labor costs at auto repair shops typically range from $80 to $150 per hour, with total repair costs potentially amounting to $300 to $1000 or more. It's important to note that the actual cost of repairs can vary based on factors such as location, vehicle make and model, and the extent of the issue. It's recommended to obtain a detailed estimate from a qualified mechanic or repair shop before proceeding with repairs.
Need more information about the U179A 2016 GMC Sierra code?
Need more information on how to fix the U179A 2016 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the U179A 2016 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about U179A 2016 GMC Sierra Code
1. What are the common symptoms of OBDII code U179A in a 2016 GMC Sierra?
- Common symptoms include the check engine light illuminated on the dashboard, issues with the hybrid/EV powertrain, and potential drivability problems.
2. What does the OBDII code U179A mean for a 2016 GMC Sierra?
- The code U179A indicates a lost communication with Hybrid/EV Powertrain Control Module 2 in the vehicle.
3. What are some possible causes of the U179A trouble code in a 2016 GMC Sierra?
- Possible causes include wiring or connection issues, a faulty powertrain control module, software glitches, or a malfunctioning communication network.
4. How can I diagnose the U179A code in my 2016 GMC Sierra?
- Diagnosing the code may require using a professional OBDII scanner to retrieve the specific details of the communication loss and checking the relevant wiring and connections for any faults.
5. Can I still drive my 2016 GMC Sierra with the U179A trouble code?
- It is not recommended to drive the vehicle with the U179A code present, as it may lead to further damage or safety concerns related to the powertrain control module.
6. How can I repair the U179A code in my 2016 GMC Sierra?
- Repairing the code typically involves addressing the root cause, which may include fixing wiring issues, replacing faulty components, updating software, or resetting the communication network.
7. Is it necessary to visit a dealership for U179A code repairs on a 2016 GMC Sierra?
- While visiting a dealership with specialized technicians and equipment is recommended for complex issues, independent auto repair shops may also be able to diagnose and repair the U179A code.
8. Are there any recalls related to the U179A trouble code in a 2016 GMC Sierra?
- It is advisable to check with the manufacturer or authorized dealerships for any recall information related to the U179A code in the specific vehicle model and year.
9. How much does it typically cost to fix the U179A code in a 2016 GMC Sierra?
- The cost of repairs for the U179A code can vary depending on the underlying issue, parts needed, labor rates, and whether the repairs are done at a dealership or an independent repair shop.
10. Can the U179A trouble code be prevented in a 2016 GMC Sierra?
- While some causes of the U179A code may be unavoidable, regular maintenance, timely software updates, and addressing any electrical issues promptly can help prevent the recurrence of the code.
Discuss the causes and fixes for U179A 2016 GMC Sierra OBDII Code
Code U179A 2016 GMC Sierra comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.