AutoCodes – GMC – U182D 2018 GMC Sierra

U182D 2018 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 2018 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 178

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 2018 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 2018 GMC Sierra - Lost Communication with Hybrid/EV Powertrain Control Module 2 on Powertrain Expansion Communication Bus - AutoCodes.com — U182D 2018 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 2018 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 2018 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 2018 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 2018 GMC Sierra Code

1. What are the common symptoms of OBDII code U182D in a 2018 GMC Sierra?

- Common symptoms include the check engine light illuminating, loss of power, issues with starting the vehicle, and potential drivability problems.

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 error between the Hybrid/EV Powertrain Control Module 2 and the Powertrain Expansion Communication Bus in the vehicle.

3. What are some possible causes of OBDII code U182D in a 2018 GMC Sierra?

- Potential causes include wiring issues, faulty connectors, a malfunctioning Hybrid/EV Powertrain Control Module 2, or problems within the Powertrain Expansion Communication Bus.

4. How can I diagnose and repair OBDII code U182D in my 2018 GMC Sierra?

- To diagnose this code, it is recommended to check the wiring, connectors, and components related to the Hybrid/EV Powertrain Control Module 2 and the Powertrain Expansion Communication Bus. Repair may involve fixing wiring issues, replacing connectors, or addressing module malfunctions.

5. Can OBDII code U182D be fixed without professional help?

- While some DIY enthusiasts may be able to diagnose and repair simple wiring issues causing this code, it is recommended to consult a professional mechanic or dealership for more complex diagnostic procedures and repairs.

6. Is it safe to drive my 2018 GMC Sierra with the OBDII code U182D present?

- It is not recommended to drive the vehicle with this code present, as it may lead to further electrical or drivability issues. It is advised to have the vehicle inspected and repaired as soon as possible.

7. How much does it typically cost to repair OBDII code U182D in a 2018 GMC Sierra?

- The cost of repair can vary depending on the exact cause of the code. It may range from a simple fix like wiring repair to more complex module replacements. It is advisable to get a professional diagnosis for an accurate estimate.

8. Can resetting the OBDII system clear the U182D code in a 2018 GMC Sierra?

- Resetting the OBDII system may temporarily clear the code, but it is important to address the underlying issue causing the code to prevent it from reoccurring. Simply resetting the system without fixing the problem will not solve the issue.

9. Will OBDII code U182D affect the fuel efficiency of my 2018 GMC Sierra?

- Yes, unresolved communication errors like U182D can impact the overall performance and fuel efficiency of the vehicle. It is recommended to address the code promptly to ensure optimal vehicle operation.

10. Are there any recalls or technical service bulletins related to OBDII code U182D in a 2018 GMC Sierra?

- It is advisable to check with a GMC dealership or the National Highway Traffic Safety Administration (NHTSA) for any relevant recalls or technical service bulletins related to this specific OBDII code in your vehicle.