U184A Code - Lost Communication with Body Control Module on Low Speed CAN Bus
Quick Answer
The diagnostic trouble code U184A indicates that there is a communication problem between the Body Control Module (BCM) and the Low Speed Controller Area Network (CAN) bus in the vehicle. Common causes include Damaged wiring or connectors, Faulty Body Control Module (BCM), Water damage or corrosion affecting electrical components. 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
- U184A indicates Lost Communication with Body Control Module on Low Speed CAN Bus.
- Common causes
- Common causes include Damaged wiring or connectors, Faulty Body Control Module (BCM), Water damage or corrosion affecting electrical components.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code U184A Description
The diagnostic trouble code U184A indicates that there is a communication problem between the Body Control Module (BCM) and the Low Speed Controller Area Network (CAN) bus in the vehicle. The BCM is a crucial component that controls various functions such as interior lighting, power windows, door locks, and other convenience features. The Low Speed CAN bus is a communication network that allows different modules in the vehicle to exchange data at a slower speed compared to the High Speed CAN bus.
Common Causes of U184A
- Damaged wiring or connectors
- Faulty Body Control Module (BCM)
- Water damage or corrosion affecting electrical components
- Loose connections in the electrical system
- Issues with the Low Speed CAN bus
Symptoms of U184A
- Non-functional power windows
- Inoperative door locks
- Interior lighting not working
- Electrical glitches such as flickering lights or dashboard warning lights
- Unresponsive key fob
How to Fix U184A
- Perform a diagnostic scan to confirm the U184A trouble code and identify the specific cause of the communication failure.
- Inspect the wiring harness and connectors for any damage or corrosion. Repair or replace as needed.
- Check for loose connections in the BCM and the Low Speed CAN bus. Secure any loose connections.
- If the BCM is found to be faulty, replace it with a new one and program it to the vehicle.
- Clear the trouble code and perform a final test to ensure that the communication between the BCM and the Low Speed CAN bus is restored.
Cost to Fix U184A
The typical repair costs for addressing the U184A trouble code can vary depending on the specific cause of the issue and the cost of parts and labor in your area. In general, the repair for this type of communication error can range from $200 to $500 or more. It is essential to consult with a reputable auto repair shop to get an accurate estimate based on your vehicle make and model, as well as the extent of the repairs required. Keep in mind that diagnostic time and labor rates can vary, so it's advisable to inquire about these details before proceeding with the repair.
Need more information about the U184A code?
Need more information on how to fix the U184A code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the U184A code diagnosed by a professional: Find a repair shop in your area
Code U184A Information for Specific Makes
- U184A Buick — Lost Communication with Body Control Module on Low Speed CAN Bus
- U184A Cadillac — Lost Communication with Body Control Module on Low Speed CAN Bus
- U184A Chevrolet — Lost Communication with Body Control Module on Low Speed CAN Bus
- U184A GMC — Lost Communication with Body Control Module on Low Speed CAN Bus
Frequently Asked Questions about U184A Code
1. What are the common symptoms of OBDII code U184A - Lost Communication with Body Control Module on Low Speed CAN Bus?
- Common symptoms include non-functioning interior lights, power window issues, door lock problems, and overall electrical system malfunctions.
2. What are the possible causes of OBDII code U184A?
- The code U184A can be caused by a faulty body control module, damaged wiring or connectors in the CAN bus network, a software malfunction, or a low voltage condition.
3. How can I diagnose the OBDII code U184A?
- Diagnosis involves using a professional OBDII scanner to communicate with the vehicle's onboard computer system. This will help pinpoint the exact source of the communication failure.
4. How can I repair OBDII code U184A?
- Repairing the code may involve checking and repairing damaged wiring, replacing the body control module if necessary, updating software, or addressing any underlying electrical issues.
5. Can I still drive my vehicle with the U184A code present?
- It is not recommended to drive the vehicle with the U184A code present, as it can lead to further electrical system issues and potential safety hazards.
6. Will resetting the code make it go away permanently?
- Simply resetting the code may temporarily clear the warning light, but it will likely reappear if the underlying issue causing the communication failure is not resolved.
7. How much does it cost to repair OBDII code U184A?
- The cost of repair can vary depending on the specific cause of the issue and the labor rates in your area. It is recommended to consult with a professional mechanic for an accurate estimate.
8. Can a DIY enthusiast fix the U184A code at home?
- While some DIY enthusiasts may have the skills to diagnose and repair the issue causing the U184A code, it is often recommended to seek professional help due to the complexity of electrical systems.
9. Is the U184A code specific to a certain make or model of vehicle?
- The U184A code can appear on various makes and models of vehicles that utilize the Low Speed CAN Bus communication system for the body control module.
10. How can I prevent the U184A code from recurring in the future?
- Regular maintenance, checking and maintaining the integrity of wiring and connectors, and addressing any electrical issues promptly can help prevent the U184A code from recurring.
Discuss the causes and fixes for U184A OBDII Code
Code U184A comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.