AutoCodes – Cadillac – U182E Cadillac

U182E Cadillac 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 Cadillac 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 419

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 Jun 07, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U182E Cadillac 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 Cadillac - Drive Motor Control Module 1 Lost Communication With Hybrid/EV Powertrain Control Module 2 On Powertrain Expansion Communication Bus - AutoCodes.com — U182E Cadillac 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 Cadillac?

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 Cadillac?

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 Cadillac 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 U182E Cadillac Code

1. What are common symptoms of OBDII code U182E in a Cadillac?

- Common symptoms include loss of power, hesitation during acceleration, poor fuel efficiency, and the illumination of the check engine light.

2. What can cause OBDII code U182E in a Cadillac to trigger?

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

3. How serious is OBDII code U182E in a Cadillac?

- This code should be addressed promptly to prevent further issues with the hybrid or electric powertrain system. Ignoring the code may result in reduced performance and efficiency.

4. What should I do if I experience OBDII code U182E in my Cadillac?

- It is recommended to have the vehicle diagnosed by a professional technician with experience in hybrid and electric systems to pinpoint the exact cause of the communication failure.

5. Can I continue driving my Cadillac with OBDII code U182E present?

- It is not advisable to continue driving the vehicle with this code active, as it may lead to further complications with the powertrain system. Seek professional assistance as soon as possible.

6. Are there any DIY repair tips for OBDII code U182E in a Cadillac?

- DIY repairs for this code are not recommended due to the complexity of the hybrid and electric powertrain system. It is best to have a qualified technician handle the diagnosis and repairs.

7. How much does it typically cost to repair OBDII code U182E in a Cadillac?

- Repair costs can vary depending on the exact cause of the communication failure. It is advisable to get a diagnosis from a professional technician to determine the extent of the repair needed.

8. Can a faulty battery or charging system cause OBDII code U182E in a Cadillac?

- While a faulty battery or charging system can cause various issues in a hybrid or electric vehicle, OBDII code U182E is specifically related to communication failure between control modules.

9. Will resetting the OBDII code U182E in a Cadillac make it go away permanently?

- Simply resetting the code without addressing the underlying issue will not make it go away permanently. The root cause of the communication failure must be diagnosed and repaired.

10. Is OBDII code U182E specific to Cadillac vehicles only?

- While the code description mentions Cadillac, similar codes related to communication failures between control modules can occur in other hybrid or electric vehicles as well.