AutoCodes – Generic – U184E

U184E Code - Lost Communication with Inflatable Restraint Sensing and Diagnostic Module on Low Speed CAN 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 Inflatable Restraint Sensing and Diagnostic Module, Inflatable Restraint Sensing and Diagnostic Module harness is open or shorted, Inflatable Restraint Sensing and Diagnostic Module 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: U184E indicates Lost Communication with Inflatable Restraint Sensing and Diagnostic Module on Low Speed CAN Bus.
Common causes: Common causes include Faulty Inflatable Restraint Sensing and Diagnostic Module, Inflatable Restraint Sensing and Diagnostic Module harness is open or shorted, Inflatable Restraint Sensing and Diagnostic Module 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 1,069

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 U184E 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 U184E - Lost Communication with Inflatable Restraint Sensing and Diagnostic Module on Low Speed CAN Bus - AutoCodes.com — U184E Code - Lost Communication with Inflatable Restraint Sensing and Diagnostic Module on Low Speed CAN Bus

What does this mean?

What are the Possible Causes of the DTC U184E?

Faulty Inflatable Restraint Sensing and Diagnostic Module
Inflatable Restraint Sensing and Diagnostic Module harness is open or shorted
Inflatable Restraint Sensing and Diagnostic Module circuit poor electrical connection

How to Fix the DTC U184E?

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 U184E 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 U184E code?

Need more information on how to fix the U184E code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U184E code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

U184E Buick — Lost Communication with Inflatable Restraint Sensing and Diagnostic Module on Low Speed CAN Bus
U184E Cadillac — Lost Communication with Inflatable Restraint Sensing and Diagnostic Module on Low Speed CAN Bus
U184E Chevrolet — Lost Communication with Inflatable Restraint Sensing and Diagnostic Module on Low Speed CAN Bus
U184E GMC — Lost Communication with Inflatable Restraint Sensing and Diagnostic Module on Low Speed CAN 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 U184E Code

1. What are the common symptoms of OBDII code U184E?

The common symptoms of OBDII code U184E include the airbag warning light illuminating on the dashboard, loss of communication with the inflatable restraint system, and potential issues with the airbag deployment in case of an accident.

2. What are the possible causes of OBDII code U184E?

Possible causes of OBDII code U184E include a faulty Inflatable Restraint Sensing and Diagnostic Module (SDM), damaged wiring or connectors in the low-speed Controller Area Network (CAN) bus, or a communication breakdown between the SDM and other modules in the vehicle.

3. How can I diagnose OBDII code U184E?

Diagnosing OBDII code U184E involves using a professional OBDII scanner to retrieve the code, checking for any associated codes or warning lights, inspecting the wiring and connectors in the low-speed CAN bus, and testing the communication between the SDM and other relevant modules.

4. What are the repair options for OBDII code U184E?

Repair options for OBDII code U184E may include repairing or replacing damaged wiring or connectors in the low-speed CAN bus, reprogramming or replacing the Inflatable Restraint SDM, and ensuring proper communication between the SDM and other modules in the vehicle.

5. Can OBDII code U184E be dangerous if left unaddressed?

Yes, OBDII code U184E can be dangerous if left unaddressed as it may result in the airbag system not deploying correctly in case of an accident, potentially leading to increased risk of injury to the vehicle occupants.

6. How do I reset OBDII code U184E?

Resetting OBDII code U184E involves using an OBDII scanner to clear the code after the underlying issue has been diagnosed and repaired. Simply clearing the code without addressing the root cause may lead to the code reappearing.

7. Is it safe to drive with OBDII code U184E active?

It is not recommended to drive with OBDII code U184E active, as it indicates a potential issue with the airbag system that can compromise the safety of the vehicle occupants in the event of a collision.

8. How much does it cost to repair OBDII code U184E?

The cost of repairing OBDII code U184E can vary depending on the underlying cause of the issue, the extent of the damage, and the labor rates of the repair shop. It is advisable to consult with a professional mechanic for an accurate estimate.

9. Can a DIY enthusiast repair OBDII code U184E?

While some DIY enthusiasts may have the skills to diagnose and repair OBDII code U184E, it is recommended to consult with a professional mechanic or technician due to the complex nature of the airbag system and the importance of ensuring its proper functionality.

10. How can I prevent OBDII code U184E from occurring again?

To prevent OBDII code U184E from occurring again, it is important to perform regular maintenance on the airbag system, address any warning lights or issues promptly, and ensure that the wiring and connectors in the low-speed CAN bus are in good condition.