AutoCodes – GMC – U182D 2017 GMC Sierra

U182D 2017 GMC Sierra Code - Lost Communication with Hybrid/EV Powertrain Control Module 2 on Powertrain Expansion Communication Bus

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: U182D 2017 GMC Sierra indicates Lost Communication with Hybrid/EV Powertrain Control Module 2 on Powertrain Expansion Communication Bus.
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.

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Code Popularity 341

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 Jul 24, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U182D 2017 GMC Sierra Description

The serial data circuit is the means by which the devices in the vehicle communicate with each other. Once the scan tool is connected to the serial data circuit through the Data Link Connector (DLC), the scan tool can be used to monitor each device for diagnostic purposes and to check for Diagnostic Trouble Codes (DTC). When the vehicle is ON, each device communicating on the serial data circuit sends a state of health message to ensure that the device is operating properly. When a device stops communicating on the serial data circuit, for example, if the device loses power or ground, the state of health message it normally sends on the serial data circuit disappears. Other devices on the serial data circuit, which expect to receive that state of health message, detect its absence; those devices in turn set a DTC associated with the loss of state of health of the non-communicating device. A loss of serial data communications DTC does not represent a failure of the devices that contain the stored DTC.

OBDII Code U182D 2017 GMC Sierra - Lost Communication with Hybrid/EV Powertrain Control Module 2 on Powertrain Expansion Communication Bus - AutoCodes.com — U182D 2017 GMC Sierra Code - Lost Communication with Hybrid/EV Powertrain Control Module 2 on Powertrain Expansion Communication Bus

What does this mean?

What are the Possible Causes of the DTC U182D 2017 GMC Sierra?

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
Faulty Body Control Module (BCM)

How to Fix the DTC U182D 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 U182D 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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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 U182D 2017 GMC Sierra Code

1. What does OBDII code U182D mean on a 2017 GMC Sierra?

Code U182D indicates a loss of communication with the Hybrid/EV Powertrain Control Module 2 on the powertrain expansion communication bus.

2. What are the common symptoms of code U182D in a 2017 GMC Sierra?

Symptoms may include a check engine light, reduced vehicle performance, limited or no electric/hybrid drive functionality, or trouble shifting.

3. What causes code U182D to appear on a 2017 GMC Sierra?

Possible causes include faulty wiring or connectors in the communication bus, a malfunctioning Hybrid/EV Powertrain Control Module 2, or issues with the vehicleâ€™s battery pack or related systems.

4. Can a weak battery cause code U182D on a GMC Sierra?

Yes, a weak or failing 12V battery or high-voltage battery can disrupt communication and trigger this code.

5. How do you diagnose code U182D on a 2017 GMC Sierra?

Diagnosis involves scanning for additional codes, inspecting the communication bus wiring and connectors, testing the powertrain module for proper operation, and checking the battery health.

6. Is it safe to drive a 2017 GMC Sierra with code U182D?

It may not be safe, as the vehicle could experience reduced power or operational issues. Prompt diagnosis and repair are recommended.

7. How can wiring issues cause code U182D on a GMC Sierra?

Damaged, corroded, or loose wires and connectors can disrupt the communication signal between the control module and other systems, triggering the code.

8. What is the cost to fix a U182D code on a 2017 GMC Sierra?

Repair costs vary depending on the root cause but can range from $100 for simple wiring repairs to over $1,000 if a module replacement is needed.

9. Can a software update fix code U182D on a GMC Sierra?

In some cases, a software update for the affected control module may resolve communication issues, but this depends on the vehicleâ€™s specific situation.

10. Do I need to replace the Hybrid/EV Powertrain Control Module 2 to fix code U182D?

Not necessarily. The module should only be replaced if itâ€™s confirmed to be faulty after thorough testing and ruling out wiring or communication issues.