AutoCodes – GMC – U182D 2016 GMC Sierra

U182D 2016 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 2016 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 181

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 2016 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 2016 GMC Sierra - Lost Communication with Hybrid/EV Powertrain Control Module 2 on Powertrain Expansion Communication Bus - AutoCodes.com — U182D 2016 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 2016 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 2016 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 2016 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.

Need more information about the U182D 2016 GMC Sierra code?

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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 2016 GMC Sierra Code

1. What are the common symptoms of OBDII code U182D in a 2016 GMC Sierra?

- Common symptoms include the check engine light coming on, issues with hybrid/EV powertrain functionality, and potential loss of communication with the Powertrain Control Module 2.

2. What does the OBDII code U182D "Lost Communication with Hybrid/EV Powertrain Control Module 2 on Powertrain Expansion Communication Bus" mean?

- This code indicates a communication problem between the vehicle's onboard computer systems, specifically related to the hybrid/EV powertrain control module 2 on the powertrain expansion communication bus.

3. What are the possible causes of the U182D code in a 2016 GMC Sierra?

- Possible causes include faulty wiring or connections, a malfunctioning powertrain control module 2, issues with the communication bus, or a software glitch within the vehicle's systems.

4. How can I diagnose the U182D trouble code in my 2016 GMC Sierra?

- Diagnosis typically involves using a diagnostic scanner to read the code, checking for other related codes, inspecting the wiring and connections, and performing any necessary software updates or resets.

5. Can I still drive my GMC Sierra with the U182D code present?

- It is not recommended to drive the vehicle with this code present, as it may indicate a serious issue with the hybrid/EV powertrain system that could potentially affect the vehicle's performance and safety.

6. How can I repair the U182D code in my 2016 GMC Sierra?

- Repair options may include checking and repairing any damaged wiring or connections, replacing the hybrid/EV powertrain control module 2 if necessary, ensuring proper software updates, and clearing the trouble code from the system.

7. Is the U182D code in a 2016 GMC Sierra a common issue?

- While not extremely common, issues related to communication faults between modules in vehicles, especially involving hybrid/EV systems, can occur and may trigger the U182D trouble code.

8. Should I attempt to repair the U182D code myself, or should I take my GMC Sierra to a professional mechanic?

- Due to the complexity of diagnosing and repairing communication bus issues, especially in hybrid/EV systems, it is recommended to seek the expertise of a professional mechanic familiar with the specific make and model of your vehicle.

9. Does the U182D trouble code affect the fuel efficiency of my 2016 GMC Sierra?

- Since the code is related to the hybrid/EV powertrain control module, it may impact the vehicle's fuel efficiency and overall performance if left unresolved. Addressing the issue promptly is crucial.

10. Can resetting the trouble codes on my 2016 GMC Sierra resolve the U182D code permanently?

- While clearing the codes may temporarily turn off the check engine light, it is essential to diagnose and address the underlying cause of the U182D code to prevent it from reoccurring and potentially causing further issues.