U179A 2014 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 2014 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.
Code U179A 2014 Chevrolet Silverado Description
What are the Possible Causes of the DTC U179A 2014 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 2014 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 2014 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.
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Frequently Asked Questions about U179A 2014 Chevrolet Silverado Code
1. What does the OBDII code U179A mean on a 2014 Chevrolet Silverado?
The U179A code indicates a "Lost Communication with Hybrid/EV Powertrain Control Module 2," meaning the vehicle's control modules are not properly communicating with each other.
2. What are the common symptoms of the U179A code?
Symptoms may include a check engine light or service light, reduced power mode, erratic shifting, or failure to start.
3. What causes the U179A code to appear?
Possible causes include faulty wiring or connectors, a malfunctioning Powertrain Control Module 2, software issues, or a blown fuse.
4. Can the U179A code cause drivability issues?
Yes, it can lead to reduced performance, limited power, or other drivability problems depending on the severity of the communication failure.
5. How can I diagnose the U179A code on my 2014 Silverado?
Start by inspecting the wiring and connectors related to the Hybrid/EV Powertrain Control Module 2, checking for damage, corrosion, or loose connections. Then use a compatible scan tool to test for module communication.
6. Is it safe to drive with a U179A code?
Driving with this code may not be safe, as it can cause the vehicle to enter limp mode or experience unpredictable behavior. It's best to address the issue promptly.
7. How can I fix the U179A code?
Repairs may involve fixing or replacing damaged wiring, ensuring all connections are secure, reprogramming the control module, or replacing the faulty Powertrain Control Module 2.
8. Can a dead battery cause the U179A code?
Yes, a weak or dead battery can disrupt module communication and trigger this code. Ensure the battery is fully charged and functioning properly.
9. Do I need to replace the Powertrain Control Module 2 to fix the U179A code?
Not always. Replacing the module is only necessary if it is confirmed to be defective after proper diagnosis.
10. Can an aftermarket scan tool clear the U179A code?
Yes, some advanced scan tools can clear the code, but the underlying issue must be resolved, or the code will likely return.
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