U0C73 - Understanding the Communication Fault in Many 2016-2020 Ford Models

Quick Answer

U0C73 means: U0C73 indicates a communication fault between vehicle control modules, particularly in Ford models.

Fix: Check and replace faulty components Cost: $100 - $300 Time: 90-180 minutes

Can I drive with U0C73? Immediate attention is recommended to avoid potential safety hazards.

Common Questions

What does U0C73 mean and how does it affect my car?

The U0C73 code signifies a communication failure between your vehicle's control modules. This can lead to erratic electronic functions, decreased performance, and potential safety issues. Addressing this promptly is crucial to maintaining vehicle integrity.

What are the most common causes of U0C73 and how much does it cost to fix?

Common causes include damaged wiring (60% likelihood) and module failure, with repair costs ranging from $100 for wiring repairs to $800 for module replacements. Regular maintenance can help prevent these issues.

Can I drive my car with U0C73 or should I stop immediately?

While you may be able to drive your car with the U0C73 code, it is not advisable due to potential safety concerns and the risk of further damage. It's best to get it diagnosed and repaired as soon as possible.

How can I diagnose U0C73 myself using GeekOBD APP?

Using the GeekOBD APP, you can scan for the U0C73 code and any related codes. The app provides freeze frame data, helping you understand the conditions under which the fault occurred, and allows you to clear codes after repairs.

What vehicles are most commonly affected by U0C73?

The U0C73 code is frequently seen in 2016-2020 Ford models, including the Ford Fusion and Ford Escape, due to their shared electronic architecture.

How can I prevent U0C73 from happening again?

Regular vehicle maintenance, including checking wiring and connections, keeping software updated, and ensuring modules are functioning properly can help prevent recurrence of the U0C73 code.

What is U0C73?

The U0C73 diagnostic trouble code indicates a communication fault between the vehicle's control modules, specifically related to the 'CAN' (Controller Area Network) bus system. This error typically arises when there's a disruption in communication between modules, preventing them from sharing vital information that is essential for various vehicle operations. Commonly found in 2016-2020 Ford models, such as the Ford Fusion and Ford Escape, the U0C73 code signifies that one or more modules are not communicating properly, leading to potential performance issues and safety concerns. When this code appears, it can manifest in various ways, such as erratic behavior of electronic features, warning lights on the dashboard, or even performance degradation. For example, you might notice that the transmission shifts unexpectedly or that your infotainment system experiences malfunctions. Ignoring this code can lead to more severe issues down the line, including compromised safety features like stability control or ABS. Therefore, it's crucial to address the U0C73 code promptly by diagnosing the underlying cause and rectifying it to ensure that all systems are functioning correctly. A thorough understanding of the interconnectivity of the vehicle's electronic systems is essential for effective troubleshooting and repair.

System: U - Network (Communication, CAN Bus)

Symptoms

Common symptoms when U0C73 is present:

  • The check engine light remains illuminated, indicating a persistent issue that needs attention.
  • Erratic operation of electronic features, such as power windows or radio, leading to driver frustration.
  • Transmission shifts unexpectedly, causing a lack of smoothness during acceleration or deceleration.
  • Instrument cluster displays incorrect readings, which may confuse the driver and impact safety.
  • Reduced fuel efficiency, potentially due to poor communication between engine management systems and other modules.

Possible Causes

Most common causes of U0C73 (ordered by frequency):

  1. The most common cause is damaged wiring or connectors in the CAN bus system, with a 60% likelihood. Visual inspection often reveals frayed wires or corrosion.
  2. Another significant cause is module failure, where one or more control modules become inoperative or unresponsive. This can be due to manufacturing defects or exposure to extreme conditions.
  3. Software glitches in the vehicle's programming can also lead to communication failures. Regular software updates can prevent this issue.
  4. Less common but serious causes include water intrusion into the control modules, which can lead to circuit board damage.
  5. A rare cause could be an electrical short, which can disrupt communication across multiple systems and requires thorough diagnostic testing.

U0C73 Repair Costs

Cost Breakdown by Repair Type

Wiring Repair

Repairing damaged wiring and connectors in the CAN bus system.

  • Total: $100 - $300
  • Success rate: 85%
Module Replacement

Replacing faulty control modules that are not communicating.

  • Total: $300 - $800
  • Success rate: 90%
Software Update

Updating the vehicle's software to resolve glitches.

  • Total: $50 - $150
  • Success rate: 70%
Money-Saving Tips for U0C73
  • 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 U0C73 Diagnosis Process

Follow these systematic steps to accurately diagnose U0C73. 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).

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).

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, such as control modules and wiring (20-30 minutes)

Step 3: Component testing - Use a multimeter or specific diagnostic tools to test suspected components, such as control modules and wiring (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: System function test - Verify proper operation after repairs and clear codes using the GeekOBD APP (10-15 minutes)

Step 4: System function test - Verify proper operation after repairs and clear codes using the GeekOBD APP (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: Road test verification - Drive vehicle under various conditions to confirm repair success and ensure all systems are functional (15-20 minutes)

Step 5: Road test verification - Drive vehicle under various conditions to confirm repair success and ensure all systems are functional (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: Ford Fusion U0C73 Communication Fault Repair

Vehicle: 2018 Ford Fusion, 50,000 miles

Problem: Customer reported the check engine light was on, and the infotainment system was malfunctioning.

Diagnosis: Initial inspection revealed damaged wiring in the CAN bus system, which was causing communication failures.

Solution: Repaired the damaged wiring and cleared the codes using the GeekOBD APP.

Cost: $250 (wiring repair and diagnostic fees)

Result: Post-repair, the vehicle's systems operated normally, and the customer reported no further issues.

Case Study 2: Ford Escape Module Replacement for U0C73

Vehicle: 2017 Ford Escape, 65,000 miles

Problem: Customer experienced erratic transmission shifts and persistent warning lights.

Diagnosis: Diagnostic testing indicated a failed control module that was not communicating with other systems.

Solution: Replaced the faulty control module and performed a software update.

Cost: $600 (module replacement and software update)

Result: After the repair, the vehicle shifted smoothly, and all warning lights were cleared.

Diagnose U0C73

Use GeekOBD APP for professional diagnosis!

  • Real-time data monitoring
  • Advanced diagnostic features
  • Step-by-step repair guidance
  • Professional-grade analysis
Download GeekOBD APP Get MOBD Adapter

Code Information

Code: U0C73
System: Network (Communication, CAN Bus)
Severity: HIGH
Category: Network Codes