U2107 Code - Lost Communication With Body Control Module
Quick Answer
The U2107 diagnostic trouble code (DTC) indicates that there is a communication issue between the Engine Control Module (ECM) and the Body Control Module (BCM) in the vehicle. Common causes include Faulty wiring harness, 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
- U2107 indicates Lost Communication With Body Control Module.
- Common causes
- Common causes include Faulty wiring harness, 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 U2107 Description
The U2107 diagnostic trouble code (DTC) indicates that there is a communication issue between the Engine Control Module (ECM) and the Body Control Module (BCM) in the vehicle. The Body Control Module is responsible for controlling various electrical functions in the vehicle, such as lighting, power windows, door locks, and other comfort features. When communication is lost between the ECM and BCM, it can result in malfunctions in these systems, affecting the overall performance and functionality of the vehicle.
Common Causes of U2107
- Faulty wiring harness
- Loose or corroded connections
- Faulty Body Control Module (BCM)
- Faulty Engine Control Module (ECM)
- Software glitch or programming issue
Symptoms of U2107
- Malfunctioning lights (headlights, taillights, interior lights)
- Power windows and door locks not working properly
- Erratic behavior of electrical components
- Vehicle going into limp mode
- Warning lights on the dashboard (such as the check engine light)
How to Fix U2107
- Perform a thorough inspection of the wiring harness and connectors to check for any damage, corrosion, or loose connections.
- Use a diagnostic scan tool to communicate with the BCM and ECM to identify the specific communication issue.
- Replace any faulty wiring harness or connectors if necessary.
- If the BCM or ECM is determined to be faulty, replace the component with a new one and reprogram it with the vehicle's specific information.
- Clear the DTC and perform a test drive to ensure that the issue has been resolved.
Cost to Fix U2107
The cost of repairing a U2107 DTC can vary depending on the specific cause of the communication issue. In general, the cost of parts such as a new BCM or ECM can range from $200 to $600, while labor costs can range from $100 to $300. Overall, the total repair cost for this issue can be between $300 and $900. It is important to note that these are rough estimates, and actual costs can vary depending on the location, make and model of the vehicle, and the rates of the auto repair shop. It is advisable to get a detailed quote from a trusted mechanic before proceeding with the repair.
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Code U2107 Information for Specific Makes
- U2107 Buick — Lost Communication With Body Control Module
- U2107 Cadillac — Lost Communication With Body Control Module
- U2107 Chevrolet — Lost Communication With Body Control Module
- U2107 Ford — Collision Mitigation By Braking
- U2107 GMC — Lost Communication With Body Control Module
- U2107 Lincoln — Collision Mitigation By Braking
- U2107 Mercury — Collision Mitigation By Braking
- U2107 Saturn — Lost Communication With Body Control Module
Frequently Asked Questions about U2107 Code
1. What are common symptoms of OBDII code U2107, Lost Communication With Body Control Module?
- Common symptoms include issues with interior and exterior lighting, power windows, door locks, or other body control functions.
2. What are the possible causes of OBDII code U2107?
- Possible causes include a faulty body control module, damaged wiring or connectors, low battery voltage, or a communication network issue.
3. How can I diagnose the cause of OBDII code U2107 at home?
- You can start by checking the body control module for any visible damage, inspecting the wiring and connectors for signs of wear or corrosion, and testing the battery voltage.
4. Can a DIY enthusiast repair OBDII code U2107?
- Depending on the cause, DIY repairs may be possible, such as replacing damaged wiring or connectors. However, complex issues with the body control module may require professional assistance.
5. Is it safe to continue driving with OBDII code U2107 present?
- It is generally not recommended to continue driving with this code present, as it may affect critical functions controlled by the body control module. Seek diagnosis and repairs promptly.
6. How much does it typically cost to repair OBDII code U2107?
- Repair costs can vary widely depending on the cause of the issue. Simple fixes like replacing wiring may cost less, while replacing the body control module can be more expensive.
7. Can a low battery voltage cause OBDII code U2107 to appear?
- Yes, low battery voltage can disrupt communication with the body control module and trigger the U2107 code. Ensure your vehicle's battery is in good condition.
8. Will resetting the OBDII system clear the U2107 code?
- Resetting the system may temporarily clear the code, but if the underlying issue is not resolved, the code is likely to reappear. It's important to diagnose and fix the root cause.
9. Can extreme temperatures affect the body control module and trigger code U2107?
- Yes, extreme temperatures can affect electronic components, including the body control module. It's important to keep your vehicle in a stable temperature environment.
10. How long does it take to repair OBDII code U2107?
- The repair time can vary based on the cause of the issue and the complexity of the repair. Simple fixes may take a short time, while more involved repairs could take longer.
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