Quick Answer
U0927 means: DTC U0927 indicates a communication failure between the vehicle's control modules.
Can I drive with U0927? Immediate attention is recommended to prevent further electrical issues.
Common Questions
What does U0927 mean and how does it affect my car?
DTC U0927 indicates that your vehicle's electronic control modules are having trouble communicating. This can lead to various issues, such as electrical failures and warning lights on your dashboard. Addressing this code is essential to maintain vehicle functionality and safety.
What are the most common causes of U0927 and how much does it cost to fix?
The most common causes of U0927 include a faulty Body Control Module, damaged wiring, or poor ground connections. Repair costs can range from $100 for minor wiring repairs to $700 for a full BCM replacement.
Can I drive my car with U0927 or should I stop immediately?
While you might be able to drive your vehicle with the U0927 code, it's not advisable. Communication issues can lead to safety concerns, and it's best to address the code as soon as possible to avoid further complications.
How can I diagnose U0927 myself using GeekOBD APP?
Using the GeekOBD APP, you can scan your vehicle's OBD2 system to check for the U0927 code. The app allows you to access freeze frame data that can help identify when the issue occurred, aiding in pinpointing the faulty component.
What vehicles are most commonly affected by U0927?
DTC U0927 is often seen in 2015-2018 Ford F-150s, but it can also affect other Ford models and some Chevrolet and GMC trucks. Check for any recalls or Technical Service Bulletins (TSBs) related to your vehicle.
How can I prevent U0927 from happening again?
Regular vehicle maintenance, including inspections of electrical systems and connections, can help prevent U0927 from reoccurring. Ensure that your vehicle's software is up-to-date and consider using protective covers for exposed wiring.
What is U0927?
DTC U0927 is a diagnostic trouble code that indicates a communication issue within the vehicle's network, specifically related to the vehicle's control modules. This code typically arises when the Body Control Module (BCM) cannot receive or send messages from/to other modules, such as the Engine Control Module (ECM) or Transmission Control Module (TCM). For car owners, this means that the vehicle may experience various operational issues due to the lack of communication. Common symptoms include the malfunction of electrical components, such as windows, lights, or dashboard displays. It's crucial to address this code promptly, as unresolved communication issues can lead to more significant electrical failures or performance problems over time. In many cases, the U0927 code can be seen in various models, particularly in 2015-2018 Ford F-150 trucks, where electrical systems are highly integrated. Ignoring the U0927 code could result in safety concerns, as the vehicle's ability to respond to driver commands may be compromised. Regular diagnostic checks using tools like the GeekOBD APP can help identify this problem early and prevent extensive repairs down the line.
System: U - Network (Communication, CAN Bus)
Symptoms
Common symptoms when U0927 is present:
- The check engine light remains illuminated, indicating a persistent fault in the vehicle's communication system.
- Power windows and locks function erratically, leading to frustration for the driver and passengers.
- Dashboard warning lights flicker or display incorrect information, which can mislead the driver about the vehicle's status.
- The vehicle experiences intermittent electrical failures, such as headlights not turning on or off as expected.
- Other modules, such as the audio system, may malfunction, leading to a poor driving experience.
Possible Causes
Most common causes of U0927 (ordered by frequency):
- The most common cause of U0927 is a faulty Body Control Module, which can happen in about 60% of cases. This can be due to moisture intrusion or electrical shorts.
- Another frequent cause is damaged wiring or connectors, accounting for around 25% of issues. Inspect wiring harnesses for wear and corrosion.
- Poor ground connections can also lead to communication errors, with a likelihood of about 10%. Ensure all ground points are clean and secure.
- Less common but serious causes include a failing Engine Control Module, which can cause multiple diagnostic codes to appear and should be diagnosed by a professional.
- Finally, a rare cause could be a software glitch within one of the control modules, which can sometimes be resolved through a software update.
U0927 Repair Costs
Cost Breakdown by Repair Type
Body Control Module Replacement
Replacing the faulty BCM can resolve the U0927 code and restore communication.
- Total: $300 - $700
- Success rate: 90%
Wiring Repair
Repairing damaged wires or connectors that might be causing communication issues.
- Total: $100 - $300
- Success rate: 85%
Money-Saving Tips for U0927
- 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 U0927 Diagnosis Process
Follow these systematic steps to accurately diagnose U0927. Each step builds on the previous one to ensure accurate diagnosis.
Step 1: Step 1
Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion (5-10 minutes)
Step 2: 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 3: Step 3
Step 3: Component testing - Use a multimeter or specific diagnostic tools to test suspected components (20-30 minutes)
Step 4: Step 4
Step 4: System function test - Verify proper operation after repairs and clear codes (10-15 minutes)
Step 5: Step 5
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 on 2017 Ford F-150
Vehicle: 2017 Ford F-150, 60,000 miles
Problem: Customer reported intermittent electrical failures and a constant check engine light.
Diagnosis: After scanning with the GeekOBD APP and identifying the U0927 code, a visual inspection revealed corrosion in the BCM connectors.
Solution: The Body Control Module was replaced, connections were cleaned, and the code was cleared.
Cost: $650 (including parts and labor)
Result: The vehicle's electrical systems operated normally post-repair, and the check engine light remained off.
Case Study 2: Wiring Repair on 2015 Chevrolet Silverado
Vehicle: 2015 Chevrolet Silverado, 75,000 miles
Problem: Owner experienced issues with power windows and dashboard lights flickering.
Diagnosis: OBD2 scan revealed U0927. Inspection found damaged wiring in the door harness.
Solution: Wiring was repaired, and connections were secured.
Cost: $150 (including labor)
Result: All electrical functions were restored, and the U0927 code did not return.