Quick Answer
U0E85 means: U0E85 signifies a communication error between vehicle modules, particularly affecting the PCM.
Can I drive with U0E85? Immediate attention is recommended to prevent further issues.
Common Questions
What does U0E85 mean and how does it affect my car?
The U0E85 code indicates a communication error between critical modules in your vehicle. This can lead to performance issues, such as hesitation during acceleration, and can even affect safety features. If you ignore this code, it may escalate into more serious problems, including system failures, which could leave you stranded.
What are the most common causes of U0E85 and how much does it cost to fix?
Common causes include damaged wiring (60% likelihood), software issues, and corrosion. Repair costs can range from $150 for wiring fixes to $1,200 for module replacements, depending on the severity and nature of the issue.
Can I drive my car with U0E85 or should I stop immediately?
Driving with a U0E85 code can be risky, especially if you experience symptoms like engine hesitation or erratic electrical behavior. It’s advisable to address the issue promptly to avoid potential safety hazards or breakdowns.
How can I diagnose U0E85 myself using GeekOBD APP?
Using the GeekOBD APP, you can scan your vehicle for DTCs, view freeze frame data, and monitor live data to identify which modules are having communication issues. Follow the app’s instructions to pinpoint the exact problem and take appropriate action.
What vehicles are most commonly affected by U0E85?
The U0E85 code is often seen in 2015-2020 Ford Explorers, but it can also affect models from other manufacturers. Always check for specific recalls or service bulletins related to your vehicle.
How can I prevent U0E85 from happening again?
Regular maintenance is key. Ensure that all electrical connections are clean and secure, and consider periodic inspections of wiring and modules, especially after any water exposure or during routine service.
What is U0E85?
The diagnostic trouble code (DTC) U0E85 indicates a communication issue within the vehicle's network, specifically related to the powertrain control module (PCM) and other modules, such as the body control module (BCM). This code typically arises when one module cannot properly communicate with another, often due to wiring problems, faulty connectors, or even software glitches. For vehicle owners, this can manifest in various ways, including warning lights on the dashboard, erratic behavior of electrical components, or a noticeable decline in performance. It is crucial to address this code promptly, as ignoring it can lead to further complications, including potential failure of critical systems like anti-lock brakes or traction control. The implications of U0E85 can vary widely depending on the vehicle make and model, with 2015-2020 Ford Explorers being notably affected. Owners should seek to diagnose the issue as soon as the code appears to avoid worsening conditions or costly repairs down the line.
System: U - Network (Communication, CAN Bus)
Symptoms
Common symptoms when U0E85 is present:
- Check engine light stays on constantly, indicating a persistent problem with the vehicle's electronic systems.
- Engine hesitates during acceleration, which can affect driving safety and performance.
- Fuel economy decreased by 10-15%, leading to more frequent visits to the gas station and increased operating costs.
- Erratic behavior of electrical components, such as power windows or lights flickering unexpectedly.
- Difficulty in starting the vehicle, which can lead to being stranded if not addressed.
Possible Causes
Most common causes of U0E85 (ordered by frequency):
- The most common cause is damaged wiring or connectors, with a likelihood of about 60%. Poor connections can lead to intermittent communication failures.
- Another common cause is software glitches in the communication protocols between modules, which can arise after updates or due to factory defects.
- Corrosion in connectors can also contribute to this problem; regular maintenance can help prevent it by keeping connections clean.
- Less common but serious causes include a failing PCM that may require replacement if it cannot be reprogrammed successfully.
- Rarely, environmental factors such as water intrusion can lead to short circuits within the vehicle's electrical system.
U0E85 Repair Costs
Cost Breakdown by Repair Type
Wiring Repair
Repairing or replacing damaged wiring or connectors to ensure proper communication.
- Total: $150 - $400
- Success rate: 85%
Module Replacement
Replacing faulty modules such as the PCM or BCM to restore communication.
- Total: $500 - $1,200
- Success rate: 90%
Software Update
Updating the vehicle's software to fix communication glitches.
- Total: $100 - $200
- Success rate: 70%
Money-Saving Tips for U0E85
- 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 U0E85 Diagnosis Process
Follow these systematic steps to accurately diagnose U0E85. 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 multimeter or specific diagnostic tools to test suspected components (20-30 minutes)
Step 3: Component testing - Use 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: Repair of U0E85 in a 2018 Ford Explorer
Vehicle: 2018 Ford Explorer, 45,000 miles
Problem: Customer reported unusual electrical issues, including intermittent power loss and check engine light.
Diagnosis: After using the GeekOBD APP, the U0E85 code was identified. A visual inspection revealed damaged wiring under the dashboard.
Solution: Repaired the damaged wiring and verified proper module communication.
Cost: $350 (including labor and parts)
Result: The customer reported no further issues after the repair, and the vehicle performed normally.
Case Study 2: U0E85 Resolution in a 2016 Ford Fusion
Vehicle: 2016 Ford Fusion, 60,000 miles
Problem: Check engine light and engine performance issues were reported.
Diagnosis: A diagnostic scan revealed U0E85 along with other codes. Testing indicated a software issue.
Solution: Performed a software update on the PCM, which resolved the communication issues.
Cost: $150 (software update cost)
Result: The vehicle returned to normal operation, with the check engine light cleared.