U179A 2014 GMC Sierra Code - Lost Communication with Hybrid/EV Powertrain Control Module 2
Quick Answer
The U179A diagnostic trouble code (DTC) for a 2014 GMC Sierra 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: Damaged or corroded wiring connections between the onboard computer system and the Hybrid/EV Powertrain Control Module 2 can disrupt communication, Malfunctioning Control Module: A malfunction within the powertrain control module itself can lead to communication errors, Network Communication Error: Issues within the vehicle's network system, such as a faulty CAN bus, can cause communication problems with the powertrain module. 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 2014 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 disrupt communication, Malfunctioning Control Module: A malfunction within the powertrain control module itself can lead to communication errors, Network Communication Error: Issues within the vehicle's network system, such as a faulty CAN bus, can cause communication problems with the powertrain module.
- 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 U179A 2014 GMC Sierra Description
The U179A diagnostic trouble code (DTC) for a 2014 GMC Sierra 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 controlling and 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 drivability of the vehicle.
Common Causes of U179A 2014 GMC Sierra
- Faulty Wiring: Damaged or corroded wiring connections between the onboard computer system and the Hybrid/EV Powertrain Control Module 2 can disrupt communication.
- Malfunctioning Control Module: A malfunction within the powertrain control module itself can lead to communication errors.
- Network Communication Error: Issues within the vehicle's network system, such as a faulty CAN bus, can cause communication problems with the powertrain module.
- Software Glitch: A software glitch or programming error within the control module can also trigger this code.
Symptoms of U179A 2014 GMC Sierra
- Check Engine Light: The most common symptom associated with this 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 or performance due to the communication loss with the Hybrid/EV Powertrain Control Module 2.
- Poor Fuel Efficiency: A drop in fuel efficiency may be noticed as a result of the powertrain control module not functioning correctly.
- Inability to Start: In severe cases, the vehicle may not start at all due to the communication issue with the powertrain control module.
How to Fix U179A 2014 GMC Sierra
- Diagnose the Issue: Use a diagnostic scanner to retrieve the specific trouble code and perform a thorough inspection of the wiring connections and control module.
- Repair or Replace Wiring: If faulty wiring is identified, repair or replace the damaged wires to restore proper communication.
- Test Control Module: Test the Hybrid/EV Powertrain Control Module 2 to determine if it is functioning correctly. Replace the module if necessary.
- Check Network System: Inspect the vehicle's network system for any communication errors and address them accordingly.
- Clear Codes and Test Drive: Clear the DTC from the vehicle's computer system, and test drive the vehicle to ensure that the communication issue has been resolved.
Cost to Fix U179A 2014 GMC Sierra
The typical repair costs for addressing a lost communication issue with the Hybrid/EV Powertrain Control Module 2 can range from $200 to $800, depending on the extent of the problem and the specific repairs needed. This estimate includes parts and labor. However, it is essential to note that diagnosis time and labor rates at auto repair shops can vary significantly based on factors such as location, vehicle make and model, and engine type. It is advisable to check with local repair shops for a more accurate estimate.
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Frequently Asked Questions about U179A 2014 GMC Sierra Code
1. What are the common symptoms of OBDII code U179A in a 2014 GMC Sierra?
The common symptoms include the check engine light illuminating, reduced fuel efficiency, loss of power, and potential drivability issues.
2. What does the OBDII code U179A "Lost Communication with Hybrid/EV Powertrain Control Module 2" mean for a 2014 GMC Sierra?
This code indicates a communication problem between the vehicle's onboard computer system and the hybrid/EV powertrain control module 2.
3. What are the possible causes of the U179A code in a 2014 GMC Sierra?
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 U179A code in my 2014 GMC Sierra?
Diagnosing the code typically involves checking the wiring and connectors for damage, ensuring proper power supply to the control module, and using a diagnostic scanner to communicate with the module.
5. Can I still drive my 2014 GMC Sierra with the U179A code present?
It is not recommended to drive the vehicle with the U179A code present, as it can lead to performance issues and potential damage to the hybrid/EV powertrain system.
6. How should I repair the U179A code in my 2014 GMC Sierra?
Repairing the U179A code may involve repairing or replacing damaged wiring, connectors, or the hybrid/EV powertrain control module 2 as needed. It's best to consult a professional mechanic for an accurate diagnosis and repair.
7. Is resetting the check engine light enough to fix the U179A code in a 2014 GMC Sierra?
Simply resetting the check engine light will not fix the underlying issue causing the U179A code. Proper diagnosis and repair of the root cause are necessary to resolve the problem.
8. Can a DIY enthusiast fix the U179A code in a 2014 GMC Sierra?
While some basic checks like inspecting wiring and connectors can be done by a DIY enthusiast, diagnosing and repairing the U179A code may require specialized tools and expertise best handled by a professional mechanic.
9. How much does it typically cost to repair the U179A code in a 2014 GMC Sierra?
The cost of repairing the U179A code can vary depending on the exact cause of the issue and the needed repairs. It's advisable to obtain a diagnostic evaluation from a qualified mechanic to determine the cost accurately.
10. How urgent is it to address the U179A code in a 2014 GMC Sierra?
It is important to address the U179A code promptly to prevent further potential damage to the hybrid/EV powertrain system and ensure the vehicle operates safely and efficiently.
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