Quick Answer
U087F means: The U087F code signifies a lost communication with the Body Control Module (BCM), affecting various electronic systems in the vehicle.
Can I drive with U087F? Address this issue promptly to prevent further electronic failures and safety risks.
Common Questions
What does U087F mean and how does it affect my car?
U087F indicates a communication problem between your car's Engine Control Module and the Body Control Module. This can lead to issues with various electronic systems, making it important to address quickly to maintain vehicle performance and safety.
What are the most common causes of U087F and how much does it cost to fix?
The most common cause of U087F is faulty wiring, which accounts for about 50% of cases. Repairs typically range from $150 to $300. Other causes include a defective Body Control Module or software issues, with repair costs varying from $100 to $800 depending on the solution needed.
Can I drive my car with U087F or should I stop immediately?
It's best to address the U087F code as soon as possible. Driving with this code can lead to further electronic failures, potentially impacting safety systems. If you notice significant symptoms, consider stopping to avoid complications.
How can I diagnose U087F myself using GeekOBD APP?
Using the GeekOBD APP, you can scan for diagnostic trouble codes and review freeze frame data. This will help you understand the context of the U087F code. You can also use the app to monitor real-time data from your ECM and BCM during vehicle operation.
What vehicles are most commonly affected by U087F?
Vehicles like the 2016-2020 Chevrolet Silverado and similar models from GMC and Cadillac are frequently affected by the U087F code. It's advisable to check for any recalls or Technical Service Bulletins (TSBs) related to this issue.
How can I prevent U087F from happening again?
Regular vehicle maintenance, including checking and cleaning electrical connections, can help prevent U087F. Additionally, avoid adding aftermarket electronics that could interfere with the vehicle's communication systems.
What is U087F?
The U087F code indicates that there is a communication issue between the vehicle's Engine Control Module (ECM) and the Body Control Module (BCM). This typically means that the ECM is unable to receive messages from the BCM, which can lead to various electronic failures. The BCM is responsible for controlling many of the vehicle's electronic systems, including lighting, power windows, and door locks. When communication is disrupted, these systems may fail to operate correctly, which can affect the overall functionality of the vehicle. In many cases, this code can lead to symptoms such as warning lights on the dashboard, malfunctioning electrical components, and even performance issues. If you own a Chevrolet Silverado from 2016 to 2020, it’s crucial to pay attention to this code, as it can result in significant inconvenience and potential safety risks. Addressing the issue promptly can help avoid further complications and costly repairs down the line. Practical steps to diagnose and resolve the U087F code involve checking for wiring issues, inspecting connectors, and possibly reprogramming the BCM or ECM if necessary. Understanding this code can empower car owners to make informed decisions about repairs and maintenance.
System: U - Network (Communication, CAN Bus)
Symptoms
Common symptoms when U087F is present:
- Check engine light stays on constantly, indicating a persistent communication issue.
- Power windows and locks may intermittently fail to operate, causing frustration for the driver.
- Dashboard warning lights for the ABS, traction control, or other systems might illuminate unexpectedly.
- Electrical accessories, such as interior lights or wipers, may function erratically, impacting driving safety.
- Fuel economy could decrease, potentially by 10-15%, due to compromised electronic control systems.
Possible Causes
Most common causes of U087F (ordered by frequency):
- Faulty wiring or connectors between the ECM and BCM - Likelihood: 50% - Corrosion or loose connections can disrupt communication.
- Failed Body Control Module (BCM) - Likelihood: 30% - A malfunction in the BCM can lead to lost communication.
- Software glitches or outdated firmware in the ECM or BCM - Likelihood: 15% - Reprogramming may be required to resolve communication issues.
- Less common cause: Electrical interference from aftermarket accessories - While rare, this can disrupt normal communication.
- Rare but possible cause: A failing Engine Control Module (ECM) that affects communication with the BCM.
U087F Repair Costs
Cost Breakdown by Repair Type
Wiring Repair
Repair or replace damaged wiring and connectors between the ECM and BCM.
- Total: $150 - $300
- Success rate: 85%
BCM Replacement
Replace the faulty Body Control Module with a new or refurbished unit.
- Total: $500 - $800
- Success rate: 90%
ECM Reprogramming
Reprogram the Engine Control Module to restore communication with the BCM.
- Total: $100 - $250
- Success rate: 75%
Money-Saving Tips for U087F
- Start with the most common and least expensive repairs first
- Use GeekOBD APP to confirm diagnosis before replacing expensive parts
- Consider preventive maintenance to avoid future occurrences
- Compare prices for OEM vs aftermarket parts based on your needs
- Address the issue promptly to prevent more expensive secondary damage
Diagnostic Steps
Professional U087F Diagnosis Process
Follow these systematic steps to accurately diagnose U087F. Each step builds on the previous one to ensure accurate diagnosis.
Step 1: Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion (5-10 minutes)
Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion (5-10 minutes).
Step 2: Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context (10-15 minutes)
Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context (10-15 minutes).
Step 3: Step 3: Component testing - Use a multimeter to test connectors and wiring for continuity and voltage (20-30 minutes)
Step 3: Component testing - Use a multimeter to test connectors and wiring for continuity and voltage (20-30 minutes).
Step 4: Step 4: System function test - Verify proper operation of the BCM and ECM after repairs and clear codes (10-15 minutes)
Step 4: System function test - Verify proper operation of the BCM and ECM after repairs and clear codes (10-15 minutes).
Step 5: Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and monitor for any symptoms (15-20 minutes)
Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and monitor for any symptoms (15-20 minutes).
Important Notes
- Always verify the repair with GeekOBD APP after completing diagnostic steps
- Clear codes and test drive to ensure the problem is resolved
- Address underlying causes to prevent code recurrence
Real Repair Case Studies
Case Study 1: U087F Resolution on a 2019 Chevrolet Silverado
Vehicle: 2019 Chevrolet Silverado 1500, 45,000 miles
Problem: Customer reported multiple electrical systems failing intermittently, including power windows and dashboard lights.
Diagnosis: Initial inspection revealed corroded wiring harness between the ECM and BCM.
Solution: Replaced the damaged wiring and performed a BCM reset.
Cost: $250 (wiring repair and labor)
Result: Customer reported all systems functioning properly after the repair.
Case Study 2: BCM Replacement for a 2018 GMC Sierra
Vehicle: 2018 GMC Sierra 1500, 60,000 miles
Problem: Vehicle displayed U087F code with numerous warning lights on the dashboard.
Diagnosis: Diagnostic scan confirmed a faulty BCM that was unable to communicate with the ECM.
Solution: Replaced the BCM and reprogrammed the ECM.
Cost: $700 (BCM part and labor)
Result: Post-repair tests showed full functionality and no further codes.