AutoCodes – GMC – U182D 2014 GMC Sierra

U182D 2014 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 2014 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 190

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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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 2014 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 2014 GMC Sierra - Lost Communication with Hybrid/EV Powertrain Control Module 2 on Powertrain Expansion Communication Bus - AutoCodes.com — U182D 2014 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 2014 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 2014 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 2014 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 2014 GMC Sierra Code

1. What are the common symptoms of OBDII code U182D in a 2014 GMC Sierra?

The common symptoms include loss of communication with the Hybrid/EV Powertrain Control Module 2, illuminated check engine light, and potential drivability issues.

2. What are the possible causes of OBDII code U182D in a 2014 GMC Sierra?

The possible causes can range from a faulty Hybrid/EV Powertrain Control Module 2, wiring issues, poor connections, to a malfunction in the Powertrain Expansion Communication Bus.

3. How can I diagnose the root cause of OBDII code U182D in my 2014 GMC Sierra?

A thorough diagnostic scan using an OBDII scanner can help identify the specific area of communication loss. Checking the wiring harness, connectors, and power supply to the Hybrid/EV Powertrain Control Module 2 is also recommended.

4. Can I continue driving my 2014 GMC Sierra with OBDII code U182D present?

It is not advisable to continue driving with the code present, as it can lead to potential drivability issues and affect the performance of the hybrid/EV powertrain system.

5. How can I repair OBDII code U182D in my 2014 GMC Sierra?

Repairing this code may involve addressing the underlying communication issue by repairing or replacing the Hybrid/EV Powertrain Control Module 2, repairing wiring faults, or ensuring proper connections in the communication bus.

6. Is it safe to clear the OBDII code U182D in my 2014 GMC Sierra without fixing the underlying issue?

Clearing the code without addressing the root cause may temporarily turn off the check engine light, but the issue will likely recur, potentially affecting the vehicle's performance and fuel efficiency.

7. Can a DIY enthusiast fix OBDII code U182D in a 2014 GMC Sierra?

While some basic troubleshooting like checking connections and fuses can be done by a DIY enthusiast, diagnosing and repairing complex communication issues may require professional assistance.

8. How much does it cost to repair OBDII code U182D in a 2014 GMC Sierra?

The cost of repair can vary depending on the exact cause of the issue, parts needed, and labor costs. It's advisable to get a diagnosis from a qualified mechanic for an accurate estimate.

9. Will OBDII code U182D affect the overall performance of my 2014 GMC Sierra?

Yes, this code can impact the hybrid/EV powertrain system's performance and fuel efficiency, so it's essential to address the issue promptly to ensure optimal vehicle operation.

10. How can I prevent OBDII code U182D from occurring in my 2014 GMC Sierra in the future?

Regular maintenance checks, ensuring proper wiring connections, and addressing any communication issues promptly can help prevent the recurrence of this OBDII code in the future.