AutoCodes – Generic – U182A

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

Quick Answer

Devices connected to the powertrain high-speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Starter/Generator Control Module, Starter/Generator Control Module harness is open or shorted, Starter/Generator 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: U182A indicates Hybrid Powertrain Control Module Lost Communication with Battery Energy Control Module on Powertrain Expansion CAN Bus Malfunction.
Common causes: Common causes include Faulty Starter/Generator Control Module, Starter/Generator Control Module harness is open or shorted, Starter/Generator 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.

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Code Popularity 2,631

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 09, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U182A Description

Devices connected to the powertrain high-speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the devices. The devices have prerecorded information about what messages are needed to be exchanged on the serial data circuits, for each virtual network. The messages are supervised and also, some periodic messages are used by the receiver device as an availability indication of the transmitter device. Each message contains the identification number of the transmitter device.
The Diagnostic Trouble Code (DTC) will be set when a supervised periodic message that includes the transmitter device availability has not been received.

OBDII Code U182A - Hybrid Powertrain Control Module Lost Communication with Battery Energy Control Module on Powertrain Expansion CAN Bus Malfunction - AutoCodes.com — U182A Code - Hybrid Powertrain Control Module Lost Communication with Battery Energy Control Module on Powertrain Expansion CAN Bus Malfunction

What does this mean?

What are the Possible Causes of the DTC U182A?

Faulty Starter/Generator Control Module
Starter/Generator Control Module harness is open or shorted
Starter/Generator Control Module circuit poor electrical connection
Faulty Battery Energy Control Module

How to Fix the DTC U182A?

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 U182A 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.

Need more information about the U182A code?

Need more information on how to fix the U182A code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U182A code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

U182A Buick — Hybrid Powertrain Control Module Lost Communication with Battery Energy Control Module on Powertrain Expansion CAN Bus Malfunction
U182A Cadillac — Hybrid Powertrain Control Module Lost Communication with Battery Energy Control Module on Powertrain Expansion CAN Bus Malfunction
U182A Chevrolet — Hybrid Powertrain Control Module Lost Communication with Battery Energy Control Module on Powertrain Expansion CAN Bus Malfunction
U182A GMC — Hybrid Powertrain Control Module Lost Communication with Battery Energy Control Module on Powertrain Expansion CAN Bus Malfunction

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 Code

1. What are the common symptoms of OBDII code U182A?

The common symptoms of OBDII code U182A include loss of communication between the hybrid powertrain control module and the battery energy control module, erratic performance of the hybrid powertrain, and possible warning lights on the dashboard.

2. What can cause the U182A code to trigger?

The U182A code is typically triggered by a malfunction in the communication between the hybrid powertrain control module and the battery energy control module on the Powertrain Expansion CAN bus. This can be due to wiring issues, faulty modules, or software glitches.

3. How can I diagnose the U182A code?

Diagnosing the U182A code usually involves using a professional OBDII scanner to retrieve the specific trouble code and then conducting a thorough inspection of the wiring harnesses, connectors, and modules involved in the hybrid powertrain system.

4. What are the possible repair options for U182A code?

Repair options for the U182A code may include checking and repairing any damaged wiring or connectors, replacing faulty modules, updating software as needed, and ensuring proper communication between the hybrid powertrain control module and the battery energy control module.

5. Can I drive my vehicle with the U182A code present?

It is not recommended to drive your vehicle with the U182A code present, as it may lead to further damage to the hybrid powertrain system and affect the performance and safety of the vehicle. It is advisable to address the issue promptly.

6. How urgent is it to fix the U182A code?

It is important to address the U182A code promptly to prevent any potential damage to the hybrid powertrain system and ensure the proper functioning of the vehicle. Ignoring the code may lead to further complications and higher repair costs.

7. Is it possible to reset the U182A code without fixing the underlying issue?

Resetting the U182A code without fixing the underlying communication issue between the hybrid powertrain control module and the battery energy control module is not recommended. The code will likely reappear until the root cause is addressed.

8. Can a DIY enthusiast fix the U182A code?

While some DIY enthusiasts may have the skills to diagnose and repair wiring issues related to the U182A code, it is recommended to consult a professional technician with experience in hybrid powertrain systems for a thorough and accurate repair.

9. How much does it cost to repair the U182A code?

The cost of repairing the U182A code can vary depending on the root cause of the issue, the extent of the damage, and the labor rates in your area. It is advisable to get a diagnostic from a qualified technician for an accurate estimate.

10. How can I prevent the U182A code from recurring?

To prevent the U182A code from recurring, it is essential to perform regular maintenance on the hybrid powertrain system, address any wiring issues promptly, and ensure proper communication between all modules in the system.