AutoCodes – Generic – U182E

U182E Code - Drive Motor Control Module 1 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: U182E indicates Drive Motor Control Module 1 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 465

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 Jun 07, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U182E 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 Code (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 the health message, detect its absence; those devices in turn set a DTC associated with the loss of the 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. The DTC will set when a supervised periodic message that includes the transmitter device availability has not been received.

OBDII Code U182E - Drive Motor Control Module 1 Lost Communication With Hybrid/EV Powertrain Control Module 2 On Powertrain Expansion Communication Bus - AutoCodes.com — U182E Code - Drive Motor Control Module 1 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 U182E?

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 U182E?

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 U182E 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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Information for Specific Makes

U182E Buick — Drive Motor Control Module 1 Lost Communication With Hybrid/EV Powertrain Control Module 2 On Powertrain Expansion Communication Bus
U182E Cadillac — Drive Motor Control Module 1 Lost Communication With Hybrid/EV Powertrain Control Module 2 On Powertrain Expansion Communication Bus
U182E Chevrolet — Drive Motor Control Module 1 Lost Communication With Hybrid/EV Powertrain Control Module 2 On Powertrain Expansion Communication Bus
U182E GMC — Drive Motor Control Module 1 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 U182E Code

1. What are the common symptoms of OBDII code U182E?

- Common symptoms include illumination of the Check Engine Light, reduced hybrid/EV powertrain performance, and potential drivability issues.

2. What could cause OBDII code U182E to trigger?

- This code is typically triggered by a communication loss between the Drive Motor Control Module 1 and the Hybrid/EV Powertrain Control Module 2 on the Powertrain Expansion Communication Bus.

3. How can I diagnose the source of the communication loss related to code U182E?

- Diagnosing the issue may involve checking for loose or damaged wiring connections, inspecting the communication bus for faults, and performing a scan tool communication test.

4. Is it safe to continue driving with code U182E present?

- It is not recommended to drive with this code present, as it can potentially affect the performance and drivability of the hybrid/EV powertrain system.

5. Can a DIY enthusiast repair OBDII code U182E?

- While some basic checks like inspecting wiring connections can be done by a DIY enthusiast, diagnosing and repairing the specific communication issue may require specialized equipment and knowledge.

6. How is OBDII code U182E typically repaired?

- Repairing this code often involves addressing the underlying communication issue, which may include repairing or replacing damaged wiring, fixing connection problems, or reprogramming control modules.

7. Are there any software updates available to address code U182E?

- In some cases, software updates provided by the vehicle manufacturer may help resolve communication issues leading to code U182E.

8. Can extreme weather conditions cause OBDII code U182E to appear?

- Extreme weather conditions can potentially affect the electrical connections and components involved in the communication system, leading to the triggering of code U182E.

9. How can regular maintenance help prevent OBDII code U182E from occurring?

- Regular maintenance, including checking and maintaining electrical connections and system components, can help prevent issues that may trigger code U182E.

10. Is it necessary to reset the system after repairing code U182E?

- It is recommended to clear the code and reset the system after repairing code U182E to ensure that the issue has been successfully resolved and the Check Engine Light is turned off.