U01A1 2017 GMC Sierra Code - Lost Communication with Hybrid/EV Battery Interface Control Module 2
Quick Answer
This diagnostic monitors the internal battery communication status between the Hybrid/EV Powertrain Control Module 2 and the Hybrid/EV Battery Interface Control Modules. Common causes include Faulty Hybrid/EV Battery Interface Control Module, Hybrid/EV Battery Interface Control Module harness is open or shorted, Hybrid/EV Battery Interface Control Module 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
- U01A1 2017 GMC Sierra indicates Lost Communication with Hybrid/EV Battery Interface Control Module 2.
- Common causes
- Common causes include Faulty Hybrid/EV Battery Interface Control Module, Hybrid/EV Battery Interface Control Module harness is open or shorted, Hybrid/EV Battery Interface Control Module 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 U01A1 2017 GMC Sierra Description
What are the Possible Causes of the DTC U01A1 2017 GMC Sierra?
- Faulty Hybrid/EV Battery Interface Control Module
- Hybrid/EV Battery Interface Control Module harness is open or shorted
- Hybrid/EV Battery Interface Control Module circuit poor electrical connection
How to Fix the DTC U01A1 2017 GMC Sierra?
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 U01A1 2017 GMC Sierra 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 U01A1 2017 GMC Sierra Code
1. What does OBDII code U01A1 mean on a 2017 GMC Sierra?
Code U01A1 indicates a loss of communication with Hybrid/EV Battery Interface Control Module 2, meaning the vehicle's control modules cannot communicate with this critical component.
2. What are the common symptoms of code U01A1 on a 2017 GMC Sierra?
Symptoms may include warning lights on the dashboard, reduced fuel efficiency, limited hybrid/EV functionality, or complete loss of hybrid operation.
3. What causes the U01A1 code to appear on a 2017 GMC Sierra?
Common causes include faulty wiring or connectors, a malfunctioning Hybrid/EV Battery Interface Control Module 2, or issues with the CAN (Controller Area Network) communication system.
4. Can a dead battery cause the U01A1 code in a 2017 GMC Sierra?
Yes, a weak or dead battery can disrupt communication between control modules, potentially triggering the U01A1 code.
5. How do you diagnose a U01A1 code on a 2017 GMC Sierra?
Begin with a visual inspection of the wiring and connectors related to Module 2. Use a scan tool to check for additional codes and monitor CAN communication signals.
6. Can driving with a U01A1 code damage my 2017 GMC Sierra?
Driving with this code can cause reduced performance and may strain the hybrid/EV system, potentially leading to further damage if not addressed.
7. How is the U01A1 code fixed on a 2017 GMC Sierra?
Repairs typically include fixing or replacing damaged wiring or connectors, reprogramming or replacing the Hybrid/EV Battery Interface Control Module 2, or resolving CAN network issues.
8. Is the U01A1 code specific to hybrid or EV systems on a 2017 GMC Sierra?
Yes, this code specifically relates to the hybrid or EV battery system and its communication with the control modules.
9. How much does it cost to repair a U01A1 code on a 2017 GMC Sierra?
Repair costs vary depending on the issue, but they can range from $150 for wiring repairs to over $1,000 for module replacement and reprogramming.
10. Is it safe to clear the U01A1 code without repairs on a 2017 GMC Sierra?
Clearing the code without addressing the root cause may temporarily remove the warning, but the issue will likely return and may worsen over time.
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