AutoCodes – Generic – U182D

U182D 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 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 1,341

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 Aug 09, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

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

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?

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 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 code?

Need more information on how to fix the U182D code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U182D code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

U182D Buick — Lost Communication with Hybrid/EV Powertrain Control Module 2 on Powertrain Expansion Communication Bus
U182D Cadillac — Lost Communication with Hybrid/EV Powertrain Control Module 2 on Powertrain Expansion Communication Bus
U182D Chevrolet — Lost Communication with Hybrid/EV Powertrain Control Module 2 on Powertrain Expansion Communication Bus
U182D GMC — Lost Communication with Hybrid/EV Powertrain Control Module 2 on Powertrain Expansion Communication Bus

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 Code

1. What are common symptoms of OBDII code U182D?

Common symptoms of code U182D include issues with the hybrid/EV powertrain system, reduced performance, warning lights on the dashboard, and difficulty starting the vehicle.

2. What are possible causes of OBDII code U182D?

Possible causes of code U182D include faulty wiring or connections, a malfunctioning hybrid/EV powertrain control module, issues with the powertrain expansion communication bus, or a software glitch.

3. How can I diagnose OBDII code U182D?

Diagnosing code U182D typically involves using a diagnostic scanner to retrieve the trouble codes, checking the connections and wiring related to the hybrid/EV powertrain control module, and performing a thorough inspection of the powertrain expansion communication bus.

4. Can I still drive my vehicle with OBDII code U182D?

It is not recommended to drive your vehicle with code U182D present, as it can lead to further damage to the hybrid/EV powertrain system and potentially cause the vehicle to stall or lose power unexpectedly.

5. How can I repair OBDII code U182D?

Repairing code U182D may involve repairing or replacing faulty wiring or connections, replacing the hybrid/EV powertrain control module, reprogramming the control module, or addressing issues with the powertrain expansion communication bus.

6. Are there any DIY tips for fixing OBDII code U182D?

DIY tips for fixing code U182D may include checking and tightening any loose connections, inspecting the wiring harness for damage, and resetting the system by disconnecting the battery for a few minutes.

7. Is OBDII code U182D a common issue in hybrid or electric vehicles?

Code U182D is more commonly found in hybrid or electric vehicles due to the complex nature of their powertrain systems and communication networks.

8. Can a low battery voltage trigger OBDII code U182D?

Low battery voltage can potentially trigger code U182D, as it may disrupt the communication between the hybrid/EV powertrain control module and other components on the powertrain expansion communication bus.

9. How long does it typically take to repair OBDII code U182D?

The time it takes to repair code U182D can vary depending on the specific cause of the issue and the availability of replacement parts. It is recommended to consult with a professional technician for an accurate estimate.

10. Is it necessary to reset the OBDII system after fixing code U182D?

After repairing code U182D, it is advisable to clear the trouble codes and reset the OBDII system to ensure that the issue has been resolved and to prevent any false warnings or alerts.