Quick Answer
U0E39 means: U0E39 indicates a communication failure between the body control module and other modules.
Can I drive with U0E39? Immediate attention is recommended to prevent further electrical issues.
Common Questions
What does U0E39 mean and how does it affect my car?
The U0E39 code means there's a communication failure between your vehicle's body control module and other modules. This can lead to various electrical issues, potentially affecting everything from your lights to your engine performance. Addressing this promptly is crucial to maintain safe and reliable operation.
What are the most common causes of U0E39 and how much does it cost to fix?
Common causes of the U0E39 code include damaged wiring (60% likelihood), software glitches, and faulty modules. The cost to fix it can range from $100 for a software update to $700 for a complete BCM replacement, depending on the problem.
Can I drive my car with U0E39 or should I stop immediately?
It's advisable not to drive your vehicle with the U0E39 code unresolved. Ignoring this code can lead to more severe electrical issues, which may compromise safety and vehicle function.
How can I diagnose U0E39 myself using GeekOBD APP?
To diagnose U0E39 using the GeekOBD APP, connect the app to your vehicle's OBD2 port and run a full scan. Review the stored codes and freeze frame data to get context on the issue, then check for any related codes that may offer additional insights.
What vehicles are most commonly affected by U0E39?
The U0E39 code is frequently reported in models like the 2016-2021 Ford Fusion, 2017-2020 Chevrolet Malibu, and some Jeep models from 2015-2019. Make sure to check for any recalls or technical service bulletins (TSBs) related to electrical systems for these vehicles.
How can I prevent U0E39 from happening again?
To prevent U0E39 from recurring, perform regular maintenance checks on your vehicle's electrical system, including inspecting wiring and connectors for damage, and keep software updated through your dealer or certified technician.
What is U0E39?
The U0E39 diagnostic trouble code (DTC) indicates a communication issue between control modules in your vehicle's network. Specifically, it signifies that the vehicle's body control module (BCM) is unable to communicate with another module, often due to wiring problems, software glitches, or hardware failures. This situation can lead to various electrical issues, including malfunctioning lights, windows, and even engine performance problems. The U0E39 code can be particularly prevalent in models like the 2016-2021 Ford Fusion, where complex electronic systems are integrated. If the U0E39 code appears, it's crucial to address it promptly because unresolved communication issues can escalate into more severe malfunctions, affecting overall vehicle safety and functionality. Drivers may experience erratic behavior from electrical components, which may seem minor at first but can lead to significant concerns if left unaddressed. It's essential to consult with a qualified technician who can perform a thorough diagnosis and implement the necessary repairs to ensure that all systems communicate effectively.
System: U - Network (Communication, CAN Bus)
Symptoms
Common symptoms when U0E39 is present:
- The check engine light may remain illuminated, indicating a significant communication error.
- Drivers may notice that the vehicle's power windows or locks are non-responsive, causing inconvenience.
- Erratic behavior of dashboard lights, such as flickering or incorrect readings, can cause confusion while driving.
- The vehicle may experience issues with ignition, leading to starting problems, which can be frustrating.
- In some cases, the car's electronic stability control (ESC) may fail to activate correctly, compromising safety.
Possible Causes
Most common causes of U0E39 (ordered by frequency):
- The most common cause of the U0E39 code is damaged wiring or connectors, which accounts for about 60% of cases. Corrosion or fraying in the wiring harness can disrupt communication between modules.
- A software glitch within the body control module or other related modules is the second most frequent cause. Updating the firmware can resolve this issue in many scenarios.
- Faulty components, such as the body control module itself, can lead to communication breakdowns. It's essential to test all modules to identify the faulty one.
- Less common, but serious causes include water intrusion in the BCM, which can cause permanent damage if not addressed quickly.
- Rarely, a complete failure of the vehicle's electrical system can trigger the U0E39 code, necessitating a more extensive electrical system inspection.
U0E39 Repair Costs
Cost Breakdown by Repair Type
Wiring Repair
Repair damaged wiring or connectors that are causing the communication failure.
- Total: $150 - $300
- Success rate: 80%
BCM Replacement
Replace the body control module if it is confirmed to be faulty.
- Total: $400 - $700
- Success rate: 90%
Software Update
Perform a software update on the BCM and other related modules.
- Total: $100 - $200
- Success rate: 70%
Money-Saving Tips for U0E39
- 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 U0E39 Diagnosis Process
Follow these systematic steps to accurately diagnose U0E39. 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: Wiring Repair on 2018 Ford Fusion
Vehicle: 2018 Ford Fusion SE, 45,000 miles
Problem: Customer reported intermittent issues with power windows and dashboard lights.
Diagnosis: A thorough inspection revealed frayed wiring in the door harness causing U0E39.
Solution: Repaired the damaged wiring and ensured secure connections.
Cost: $250 (including labor and parts)
Result: Post-repair, all electrical systems functioned correctly, and the U0E39 code was cleared.
Case Study 2: BCM Replacement for 2020 Chevrolet Malibu
Vehicle: 2020 Chevrolet Malibu LT, 30,000 miles
Problem: Customer's vehicle had multiple warning lights on and erratic dashboard behavior.
Diagnosis: Diagnostic scanning confirmed U0E39, leading to further testing of the BCM.
Solution: Replaced the faulty body control module and updated the vehicle software.
Cost: $600 (including BCM and labor)
Result: The vehicle's systems returned to normal operation with no further issues.