U0768 - Understanding DTC U0768: Communication Issues in 2015-2019 Ford F-150 and Other Vehicles

Quick Answer

U0768 means: DTC U0768 indicates a communication failure between vehicle control modules.

Fix: Check and replace faulty components Cost: $150 - $500 Time: 90-180 minutes

Can I drive with U0768? Immediate attention is recommended to prevent further issues.

Common Questions

What does U0768 mean and how does it affect my car?

DTC U0768 indicates a communication failure between control modules in your car. This can lead to performance issues, such as stalling or erratic shifting. If ignored, it may result in more severe problems, including complete module failure, affecting the safety and reliability of your vehicle.

What are the most common causes of U0768 and how much does it cost to fix?

Common causes include damaged wiring (60% likelihood), faulty control modules (25%), and grounding issues. Repair costs range from $150 for wiring repairs to $1200 for module replacement, depending on the severity and parts needed.

Can I drive my car with U0768 or should I stop immediately?

It's advisable to stop driving if you see this code. Continuing to drive can worsen the problem and potentially lead to unsafe driving conditions or further damage to the vehicle.

How can I diagnose U0768 myself using GeekOBD APP?

Using the GeekOBD APP, you can scan for DTCs, view freeze frame data, and check for related codes. Follow the app's prompts to test the vehicle's systems and identify any communication failures.

What vehicles are most commonly affected by U0768?

U0768 is frequently reported in 2015-2019 Ford F-150 models, as well as select models from Chevrolet, Dodge, and GMC. It's important to be aware of any recalls or technical service bulletins related to your specific vehicle.

How can I prevent U0768 from happening again?

Regular maintenance checks, especially of the electrical system and wiring harnesses, can help prevent U0768. Keep connectors clean and ensure software updates are performed by professionals.

What is U0768?

DTC U0768 is a diagnostic trouble code indicating a communication problem between modules in a vehicle’s network. Specifically, it signifies that the control module is unable to communicate with another module over the CAN (Controller Area Network) bus. This issue can arise from various factors, including wiring problems, module failures, or software issues. When the vehicle’s onboard diagnostics detects this code, it often triggers the check engine light, and in some cases, you may experience performance issues such as reduced power or erratic shifting. For many vehicle owners, especially those who drive models like the 2015-2019 Ford F-150, understanding the implications of this code is crucial as it may affect critical systems such as transmission control and engine management. If left unaddressed, it can lead to further complications, including additional codes or complete module failure, resulting in costly repairs down the line. Thus, promptly diagnosing and resolving the U0768 code is essential for maintaining vehicle performance and safety.

System: U - Network (Communication, CAN Bus)

Symptoms

Common symptoms when U0768 is present:

  • The check engine light illuminates and stays on, indicating a general fault that requires attention.
  • You may notice engine performance issues, such as hesitations or stalling during acceleration, which can be frustrating and potentially dangerous.
  • Increased fuel consumption can be observed, with reports of up to a 15% decrease in fuel efficiency due to improper module communication affecting engine timing and fuel delivery.
  • Transmission shift points may feel erratic or delayed, which can lead to uncomfortable driving experiences and potential safety hazards.
  • In some cases, you might experience warning messages on the dashboard related to various vehicle systems, depending on the modules affected.

Possible Causes

Most common causes of U0768 (ordered by frequency):

  1. The most common cause is a faulty wiring harness or damaged connectors, with a likelihood of about 60%. Corrosion or breaks in the wiring can disrupt communication.
  2. Another potential cause is a malfunctioning control module, which may not be sending or receiving signals correctly. This has a likelihood of around 25%. Ensuring the software is up-to-date can mitigate this issue.
  3. Improper grounding can also cause U0768, as electrical systems require good grounding for optimal function. Regular checks during maintenance can prevent this.
  4. Less common but serious causes include water intrusion in electrical connectors, which can lead to module failures if not addressed swiftly.
  5. A rare cause could be a software glitch that requires a reprogramming of the affected modules to restore proper communication.

U0768 Repair Costs

Cost Breakdown by Repair Type

Wiring Harness Repair

Repair or replacement of damaged wiring or connectors.

  • Total: $150 - $500
  • Success rate: 85%
Control Module Replacement

Replacing a faulty control module that fails to communicate.

  • Total: $300 - $1200
  • Success rate: 95%
Software Update

Reprogramming modules to correct communication issues.

  • Total: $100 - $200
  • Success rate: 75%
Money-Saving Tips for U0768
  • 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 U0768 Diagnosis Process

Follow these systematic steps to accurately diagnose U0768. 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). Look specifically at areas where wiring may be exposed to moisture.

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: 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). The app can also show related codes that may provide additional context.

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: 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). This includes checking voltage and continuity in affected circuits.

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: 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). Use the GeekOBD APP to confirm that all previous codes have been cleared.

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: Road test verification - Drive the vehicle under various conditions to confirm repair success (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success (15-20 minutes). Monitor for any return of the check engine light or performance issues.

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: Wiring Harness Repair in 2016 Ford F-150

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

Problem: Customer reported check engine light illumination and transmission shifting issues.

Diagnosis: Diagnostic scan revealed code U0768 along with other related codes. Visual inspection showed corrosion in the wiring harness.

Solution: Replaced damaged wiring and connectors in the harness, cleared codes, and performed a system check.

Cost: $350 (parts and labor included)

Result: Issue resolved, and the customer reported smooth operation with no further codes.

Case Study 2: Control Module Replacement in 2018 Chevrolet Silverado

Vehicle: 2018 Chevrolet Silverado, 30,000 miles

Problem: Owner experienced stalling and poor acceleration, with the check engine light on.

Diagnosis: OBD scan indicated U0768, and tests confirmed a faulty transmission control module.

Solution: Replaced the transmission control module and reprogrammed it using GeekOBD APP.

Cost: $800 (including parts and reprogramming)

Result: Vehicle performance improved significantly, with no recurrence of the code.

Diagnose U0768

Use GeekOBD APP for professional diagnosis!

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Code Information

Code: U0768
System: Network (Communication, CAN Bus)
Severity: HIGH
Category: Network Codes