Quick Answer
U087C means: DTC U087C signifies a communication failure between vehicle control modules.
Can I drive with U087C? Immediate attention is recommended to prevent further electrical issues.
Common Questions
What does U087C mean and how does it affect my car?
DTC U087C indicates a communication issue between the Body Control Module and other vehicle modules. It can lead to various operational problems such as malfunctioning lights and power accessories, ultimately impacting safety and performance.
What are the most common causes of U087C and how much does it cost to fix?
The most common cause of U087C is a faulty Body Control Module, which can cost between $300 and $800 to replace. Wiring issues can also cause this code, with repair costs ranging from $100 to $300.
Can I drive my car with U087C or should I stop immediately?
While you may still be able to drive your vehicle with the U087C code, it's advisable to seek repairs immediately to avoid potential safety issues. Ignoring the code may lead to more serious electrical problems.
How can I diagnose U087C myself using GeekOBD APP?
To diagnose U087C using the GeekOBD APP, connect the app to your vehicle's OBD2 port, run a full scan to retrieve the trouble codes, and examine the freeze frame data for additional context on the error.
What vehicles are most commonly affected by U087C?
Vehicles commonly affected by U087C include the 2016-2020 Chevrolet Silverado, GMC Sierra, and other GM models from the same years. Be sure to check for any recalls or Technical Service Bulletins (TSBs) related to this issue.
How can I prevent U087C from happening again?
To prevent U087C from recurring, ensure regular vehicle maintenance, particularly electrical system checks, and promptly address any signs of corrosion or wear in wiring and connectors.
What is U087C?
DTC U087C is a diagnostic trouble code indicating a communication issue between the vehicle's control modules, specifically related to the vehicle's data communication network. This code usually points to an issue with the Body Control Module (BCM) not receiving valid data from another module, or it may indicate that the BCM itself is malfunctioning. The U087C code is prevalent in various makes and models but is commonly associated with 2016-2020 Chevrolet Silverado trucks. When this code appears, it can lead to a variety of operational issues such as malfunctioning lights, improper functioning of the power windows, or even problems with the vehicle's braking system. In real-world terms, a driver may notice that the vehicle’s dashboard lights flicker, or the power accessories may not work as intended. Ignoring this code could potentially lead to more severe electrical issues and even impact your vehicle's safety features. Therefore, addressing the U087C code promptly is crucial for maintaining vehicle integrity and performance. If left unresolved, it may also lead to increased repair costs down the line, as unresolved communication issues can cascade into larger problems within the vehicle's electrical system.
System: U - Network (Communication, CAN Bus)
Symptoms
Common symptoms when U087C is present:
- Check engine light stays on constantly, indicating potential communication failure.
- Power windows operate intermittently, affecting driver and passenger accessibility.
- Dashboard lights may flicker or fail to illuminate properly, confusing vehicle operation.
- Braking system performance may be compromised, leading to reduced vehicle safety.
- Fuel economy may decrease by 5-10% due to inefficient module communication.
Possible Causes
Most common causes of U087C (ordered by frequency):
- Most common cause is a faulty Body Control Module (BCM), occurring in approximately 60% of cases.
- Wiring issues or corroded connectors can disrupt communication, often leading to a 20% likelihood.
- Loose connections at the BCM or other modules can cause intermittent failures, with a 10% occurrence rate.
- Less common but serious causes include software glitches in the BCM, which may require reprogramming.
- Rarely, total module failure can occur, necessitating complete replacement of the BCM.
U087C Repair Costs
Cost Breakdown by Repair Type
BCM Replacement
Replacing the Body Control Module is often necessary if diagnostics point to a malfunction.
- Total: $300 - $800
- Success rate: 85%
Wiring Repair
Repairing or replacing corroded or damaged wiring can resolve communication issues.
- Total: $100 - $300
- Success rate: 75%
Money-Saving Tips for U087C
- 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 U087C Diagnosis Process
Follow these systematic steps to accurately diagnose U087C. 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 or specific diagnostic tools to test suspected components (20-30 minutes)
Step 3: Component testing - Use a multimeter or specific diagnostic tools to test suspected components (20-30 minutes).
Step 4: Step 4: System function test - Verify proper operation after repairs and clear codes (10-15 minutes)
Step 4: System function test - Verify proper operation after repairs and clear codes (10-15 minutes).
Step 5: Step 5: Road test verification - Drive vehicle under various conditions to confirm repair success (15-20 minutes)
Step 5: Road test verification - Drive vehicle under various conditions to confirm repair success (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: BCM Replacement in a 2017 Chevrolet Silverado
Vehicle: 2017 Chevrolet Silverado 1500, 60,000 miles
Problem: Customer reported persistent dashboard warning lights and intermittent power window failures.
Diagnosis: After scanning for codes, U087C was identified. A visual inspection revealed a faulty BCM.
Solution: Replaced the BCM and reprogrammed it to synchronize with other modules.
Cost: $600 (parts and labor)
Result: Customer reported all functions restored, with no further issues.
Case Study 2: Wiring Repair on a 2018 GMC Sierra
Vehicle: 2018 GMC Sierra 1500, 45,000 miles
Problem: Driver noticed flickering dashboard lights and non-operational power locks.
Diagnosis: DTC U087C was retrieved, with inspection revealing corroded wiring connectors.
Solution: Repaired the damaged wiring and replaced corroded connectors.
Cost: $200 (parts and labor)
Result: Problem resolved with all electrical systems functioning normally.