U0384 - Understanding DTC U0384: Common Issues in 2015-2018 Ford F-150 and Other Models

Quick Answer

U0384 means: DTC U0384 indicates a communication error between the body control module and other vehicle systems.

Fix: Check and replace faulty components Cost: $300 - $800 Time: 90-180 minutes

Can I drive with U0384? Immediate attention is recommended as it can affect vehicle safety and performance.

Common Questions

What does U0384 mean and how does it affect my car?

DTC U0384 indicates a communication issue between the body control module and other systems in your vehicle. This can lead to problems with electrical components like windows, locks, and lighting, potentially affecting your vehicle's overall safety and performance.

What are the most common causes of U0384 and how much does it cost to fix?

The most common cause of U0384 is a faulty BCM, which can cost between $300 and $800 to replace. Other causes include damaged wiring (costing $100 to $300) and software issues (around $50 to $150 for updates).

Can I drive my car with U0384 or should I stop immediately?

While you can technically drive with U0384, it's not advisable. The error can affect safety features like traction control and ABS, so it's best to have it diagnosed and repaired as soon as possible.

How can I diagnose U0384 myself using GeekOBD APP?

To diagnose U0384 with the GeekOBD APP, connect the app to your vehicle’s OBD2 port, retrieve the trouble codes, and analyze the freeze frame data. Look for any patterns in the data that may indicate other related issues.

What vehicles are most commonly affected by U0384?

DTC U0384 is commonly found in 2015-2018 Ford F-150s, but other models like the Ford Explorer and certain Chevrolet vehicles may also experience this issue due to similar BCM configurations.

How can I prevent U0384 from happening again?

To prevent U0384, regularly inspect and maintain your vehicle's electrical systems, ensure firmware is up to date, and avoid exposing your vehicle's electronics to moisture or extreme temperatures.

What is U0384?

DTC U0384 refers to a communication error between the vehicle's control modules, specifically indicating a 'Invalid Data Received from Body Control Module (BCM)'. This issue can manifest when the BCM, which is responsible for controlling various body functions like lights, locks, and windows, fails to send or receive proper data from other modules, such as the powertrain control module (PCM) or transmission control module (TCM). In real-world terms, if you encounter this code, you might experience symptoms like warning lights on your dashboard, erratic behavior of electrical components, or even reduced engine performance. The severity of this code is notable as it can lead to safety issues if the BCM is not functioning correctly, potentially affecting crucial systems like traction control, stability control, or anti-lock brakes. If left unaddressed, it could lead to more significant repairs down the line as other components may also be impacted by the communication failure. It’s essential to diagnose and resolve the U0384 code promptly to avoid further complications and ensure your vehicle operates safely and efficiently.

System: U - Network (Communication, CAN Bus)

Symptoms

Common symptoms when U0384 is present:

  • Check engine light remains illuminated, indicating a persistent issue that needs attention.
  • Power windows and locks may operate intermittently, leading to inconvenience and potential safety concerns.
  • Dashboard warning lights may flicker or behave erratically, suggesting communication problems within vehicle systems.
  • Inconsistent operation of vehicle features like climate control or lighting, which can lead to driver frustration.
  • Decreased fuel efficiency, which may vary by 10-15%, as the engine may not be running optimally.

Possible Causes

Most common causes of U0384 (ordered by frequency):

  1. The most common cause of U0384 is a faulty body control module (BCM), with an estimated likelihood of about 60%. This can happen due to age, exposure to moisture, or electrical surges.
  2. Another potential cause is damaged wiring or connectors between the BCM and other modules, which can account for around 25% of cases. Inspecting these areas for fraying or corrosion is crucial.
  3. Software issues can also trigger U0384, often due to outdated firmware or bugs. Keeping your vehicle’s software updated can mitigate this risk.
  4. Less common causes include a failing powertrain control module (PCM), which can complicate the issue further and requires specialized diagnostic tools to identify.
  5. Rarely, environmental factors such as excessive heat or cold can affect the BCM's performance, particularly in older vehicles.

U0384 Repair Costs

Cost Breakdown by Repair Type

BCM Replacement

Replacing the body control module if it is determined to be faulty.

  • Total: $300 - $800
  • Success rate: 85%
Wiring Repair

Repairing or replacing damaged wiring or connectors between BCM and other modules.

  • Total: $100 - $300
  • Success rate: 75%
Software Update

Updating the vehicle's software to fix potential bugs causing the communication error.

  • Total: $50 - $150
  • Success rate: 90%
Money-Saving Tips for U0384
  • 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 U0384 Diagnosis Process

Follow these systematic steps to accurately diagnose U0384. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Conduct an initial visual inspection of the BCM and associated wiring to check for obvious signs of damage or corrosion (5-10 minutes)

Step 1: Conduct an initial visual inspection of the BCM and associated wiring to check for obvious signs of damage or corrosion (5-10 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 2: Step 2: Use an OBD2 scan tool or the GeekOBD APP to retrieve all diagnostic trouble codes and freeze frame data, which helps provide context to the U0384 code (10-15 minutes)

Step 2: Use an OBD2 scan tool or the GeekOBD APP to retrieve all diagnostic trouble codes and freeze frame data, which helps provide context to the U0384 code (10-15 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 3: Step 3: Perform component testing on the BCM using a multimeter to check for proper voltage and ground signals (20-30 minutes)

Step 3: Perform component testing on the BCM using a multimeter to check for proper voltage and ground signals (20-30 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 4: Step 4: After repairs, conduct a system function test to verify that all modules are communicating correctly and clear the codes (10-15 minutes)

Step 4: After repairs, conduct a system function test to verify that all modules are communicating correctly and clear the codes (10-15 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 5: Step 5: Execute a road test to ensure the vehicle operates smoothly under various conditions and confirm the effectiveness of repairs (15-20 minutes)

Step 5: Execute a road test to ensure the vehicle operates smoothly under various conditions and confirm the effectiveness of repairs (15-20 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.

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 2016 Ford F-150

Vehicle: 2016 Ford F-150, 45,000 miles

Problem: The customer reported intermittent power window operation and dashboard warning lights.

Diagnosis: After scanning with the GeekOBD APP, U0384 was identified along with other codes. Visual inspection revealed corrosion at the BCM connector.

Solution: Replaced the BCM and cleaned the connectors to ensure proper communication.

Cost: $720 (BCM: $600, Labor: $120)

Result: Customer reported all features functioning correctly post-repair, with no further issues.

Case Study 2: Wiring Repair on 2017 Chevrolet Silverado

Vehicle: 2017 Chevrolet Silverado, 30,000 miles

Problem: The driver experienced issues with the electronic locks and headlights flickering.

Diagnosis: U0384 was found after running a diagnostic scan. Inspection revealed damaged wiring harness near the BCM.

Solution: Repaired the damaged wiring and sealed connections to prevent further issues.

Cost: $250 (Wiring Repair: $200, Labor: $50)

Result: Post-repair, the locks and headlights operated smoothly without any issues.

Diagnose U0384

Use GeekOBD APP for professional diagnosis!

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  • Professional-grade analysis
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Code Information

Code: U0384
System: Network (Communication, CAN Bus)
Severity: HIGH
Category: Network Codes