U184A 2016 GMC Sierra Code - Lost Communication with Body Control Module on Low Speed CAN Bus
Quick Answer
The U184A diagnostic trouble code (DTC) for a 2016 GMC Sierra indicates that there has been a loss of communication with the Body Control Module (BCM) on the Low Speed Controller Area Network (CAN) Bus. Common causes include Wiring harness issues, Loose or corroded connections, Faulty Body Control Module (BCM). 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 2016 GMC Sierra indicates Lost Communication with Body Control Module on Low Speed CAN Bus.
- Common causes
- Common causes include Wiring harness issues, Loose or corroded connections, Faulty Body Control Module (BCM).
- 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 U184A 2016 GMC Sierra Description
The U184A diagnostic trouble code (DTC) for a 2016 GMC Sierra indicates that there has been a loss of communication with the Body Control Module (BCM) on the Low Speed Controller Area Network (CAN) Bus. The BCM is a crucial component of the vehicle's electrical system, responsible for controlling various functions such as interior and exterior lighting, power windows, door locks, and other convenience features. The Low Speed CAN Bus is a communication network that allows different modules within the vehicle to exchange information at a lower speed compared to the High Speed CAN Bus.
Common Causes of U184A 2016 GMC Sierra
- Wiring harness issues
- Loose or corroded connections
- Faulty Body Control Module (BCM)
- Problems with other modules on the Low Speed CAN Bus
- Electrical system malfunctions
Symptoms of U184A 2016 GMC Sierra
- Inoperative power windows or door locks
- Malfunctioning interior lights
- Exterior lighting issues
- Warning lights illuminated on the dashboard
- Loss of communication with other modules on the Low Speed CAN Bus
How to Fix U184A 2016 GMC Sierra
- Perform a comprehensive diagnostic scan to retrieve the specific DTC and pinpoint the source of the communication loss.
- Inspect the wiring harness for any damage, corrosion, or loose connections. Repair or replace as needed.
- Check the BCM and other modules on the Low Speed CAN Bus for faults. Replace any faulty components.
- Clear the DTC and perform a relearn procedure to ensure proper communication between modules.
- Test the affected systems to verify proper operation and ensure the issue has been resolved.
Cost to Fix U184A 2016 GMC Sierra
The typical repair costs for addressing a U184A DTC on a 2016 GMC Sierra can vary depending on the specific cause of the communication loss. In general, the cost of parts such as a new BCM or wiring harness repairs can range from $200 to $800. Labor costs at auto repair shops typically range from $80 to $150 per hour, and the total repair bill can amount to $300 to $1200 or more, depending on the extent of the repairs needed. It is advisable to consult with a qualified technician to obtain an accurate estimate based on the specific diagnosis and repair requirements for your vehicle.
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Frequently Asked Questions about U184A 2016 GMC Sierra Code
What does the OBDII code U184A mean for a 2016 GMC Sierra?
U184A indicates a lost communication issue with the Body Control Module (BCM) over the Low Speed Controller Area Network (CAN) bus.
What are common symptoms associated with the U184A code?
Common symptoms include malfunctioning lights, issues with door locks, problems with the power windows, and other electronic features not responding.
What could cause the U184A code to trigger?
Possible causes include a faulty Body Control Module, damaged wiring or connectors in the CAN bus, or problems with other modules affecting communication.
How can I diagnose the U184A code?
To diagnose U184A, inspect the wiring and connectors for damage, check for other related codes, and test the Body Control Module's functionality.
Are there any quick fixes for the U184A code?
A quick fix may include resetting the code and checking for loose or corroded connections. If the issue persists, further diagnosis is needed.
What should I do if I see the U184A code?
It's recommended to perform a thorough inspection of the BCM and CAN bus wiring. If you are not comfortable doing this, consider taking the vehicle to a professional mechanic.
Can I drive my 2016 GMC Sierra with the U184A code?
While you may be able to drive, it's advisable to address the U184A code promptly, as it can affect the functionality of essential electronic systems.
What tools do I need to troubleshoot the U184A code?
You'll need an OBDII scanner to read codes, a multimeter for electrical testing, and possibly wiring diagrams for the vehicle's electrical system.
Is it necessary to replace the Body Control Module when dealing with U184A?
Not necessarily. The BCM may only need repairs or reprogramming, but replacement could be required if it is confirmed to be faulty.
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