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U182A 2017 GMC Sierra Code - Hybrid Powertrain Control Module Lost Communication with Battery Energy Control Module on Powertrain Expansion CAN Bus Malfunction

Quick Answer

The diagnostic trouble code U182A for a 2017 GMC Sierra indicates that there is a communication issue between the Hybrid Powertrain Control Module (HPCM) and the Battery Energy Control Module (BECM) on the Powertrain Expansion Controller Area Network (CAN) bus. Common causes include Faulty wiring or connections in the CAN bus network, Malfunctioning HPCM or BECM, Software issues or communication protocol errors. 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
U182A 2017 GMC Sierra indicates Hybrid Powertrain Control Module Lost Communication with Battery Energy Control Module on Powertrain Expansion CAN Bus Malfunction.
Common causes
Common causes include Faulty wiring or connections in the CAN bus network, Malfunctioning HPCM or BECM, Software issues or communication protocol errors.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 13, 2024
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Code U182A 2017 GMC Sierra Description

The diagnostic trouble code U182A for a 2017 GMC Sierra indicates that there is a communication issue between the Hybrid Powertrain Control Module (HPCM) and the Battery Energy Control Module (BECM) on the Powertrain Expansion Controller Area Network (CAN) bus. The CAN bus is a network that allows various modules in the vehicle to communicate with each other. In this case, the HPCM is not receiving the necessary data from the BECM, which can lead to a range of issues affecting the vehicle's hybrid powertrain system.

OBDII Code U182A 2017 GMC Sierra - Hybrid Powertrain Control Module Lost Communication with Battery Energy Control Module on Powertrain Expansion CAN Bus Malfunction
U182A 2017 GMC Sierra Code - Hybrid Powertrain Control Module Lost Communication with Battery Energy Control Module on Powertrain Expansion CAN Bus Malfunction

Common Causes of U182A 2017 GMC Sierra

  1. Faulty wiring or connections in the CAN bus network
  2. Malfunctioning HPCM or BECM
  3. Software issues or communication protocol errors
  4. Electrical interference or signal disruption
  5. Water or moisture damage to the modules

Symptoms of U182A 2017 GMC Sierra

  1. Reduced fuel efficiency
  2. Loss of power or acceleration
  3. Illumination of the hybrid system warning light on the dashboard
  4. Inconsistent or erratic hybrid system operation
  5. Difficulty starting the vehicle

How to Fix U182A 2017 GMC Sierra

  1. Begin by conducting a thorough inspection of the CAN bus wiring and connections to identify any visible damage or loose connections. Repair or replace any faulty wiring as needed.
  2. Use a diagnostic scan tool to communicate with the HPCM and BECM to check for error codes and attempt to establish communication between the modules.
  3. Update the software in the HPCM and BECM to the latest versions provided by the manufacturer to address any known communication issues.
  4. Check for any signs of water intrusion or corrosion on the modules and connectors, addressing any damage found and ensuring proper sealing to prevent future issues.
  5. If the problem persists after these steps, consider replacing the HPCM or BECM modules if they are determined to be faulty and unable to establish communication.

Cost to Fix U182A 2017 GMC Sierra

The typical repair costs for addressing a U182A code on a 2017 GMC Sierra can vary depending on the specific cause of the communication issue. In general, the parts required for this repair, such as wiring, connectors, or modules, can range from $200 to $800. Labor costs at an auto repair shop can add an additional $100 to $300, depending on the complexity of the diagnosis and repair process. It's important to note that these estimates are approximate and can fluctuate based on factors such as location, shop rates, and the extent of the repair needed. It is recommended to consult with a qualified mechanic or dealership for a more accurate cost estimate based on the specific circumstances of the vehicle.

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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 U182A 2017 GMC Sierra Code

1. What does the OBDII code U182A mean on a 2017 GMC Sierra?

The U182A code indicates a loss of communication between the Hybrid Powertrain Control Module and the Battery Energy Control Module on the Powertrain Expansion CAN Bus.

2. What are the common symptoms of the U182A code on a 2017 GMC Sierra?

Symptoms may include a check engine light, reduced power mode, poor fuel efficiency, or difficulty starting the vehicle.

3. What causes the U182A code on a 2017 GMC Sierra?

Common causes include faulty wiring or connectors in the CAN Bus network, a malfunctioning Hybrid Powertrain Control Module, or a defective Battery Energy Control Module.

4. Can the U182A code be triggered by a dead or weak battery?

Yes, a weak or dead vehicle battery can cause communication issues and trigger the U182A code.

5. How do you diagnose the U182A code on a 2017 GMC Sierra?

Diagnosis involves checking the CAN Bus wiring for damage, inspecting connectors for corrosion or loose pins, and testing the modules for proper functionality using a scan tool.

6. Can the U182A code clear on its own?

The code may clear temporarily if the issue is intermittent, but it will likely return if the underlying problem is not addressed.

7. How much does it cost to repair the U182A code on a 2017 GMC Sierra?

Repair costs vary but typically range from $150 to $500, depending on whether it involves wiring repairs, module replacement, or reprogramming.

8. Is it safe to drive a 2017 GMC Sierra with the U182A code?

Driving with this code may result in reduced power mode or other drivability issues, so it’s best to address the problem promptly.

9. Can software updates fix the U182A code?

In some cases, reprogramming or updating the software in the control modules can resolve communication errors like the U182A code.

10. Should both the Hybrid Powertrain Control Module and Battery Energy Control Module be replaced for the U182A code?

Not necessarily. Proper diagnosis is essential to determine which module or component is causing the issue before replacing any parts.

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