U017F - Lost Communication with Vehicle Communication Module (VCM) in Ford and Chrysler Models

Quick Answer

U017F means: U017F indicates a lost communication with the Vehicle Communication Module.

Fix: Check and replace faulty components Cost: $100 - $500 Time: 90-180 minutes

Can I drive with U017F? Immediate attention is required to avoid further complications.

Common Questions

What does U017F mean and how does it affect my car?

The U017F code means there is a communication failure between your vehicle’s control modules, which can lead to poor performance, malfunctioning electrical systems, and even safety issues. Addressing this promptly is essential for optimal vehicle function.

What are the most common causes of U017F and how much does it cost to fix?

Common causes include faulty wiring, a malfunctioning VCM, or outdated software. Repair costs can range from $50 for a software update to $700 for a full module replacement, depending on the issue.

Can I drive my car with U017F or should I stop immediately?

While it may be possible to drive your vehicle, it's not advisable. Continuing to drive with U017F can lead to more serious problems, including a complete loss of vehicle functions. It’s best to get it diagnosed and repaired as soon as possible.

How can I diagnose U017F myself using GeekOBD APP?

To diagnose U017F, connect the GeekOBD APP to your vehicle’s OBD2 port. Run a full scan to retrieve the U017F code and any related codes. Check freeze frame data for context and inspect wiring and connectors based on the faults indicated.

What vehicles are most commonly affected by U017F?

U017F is commonly found in 2015-2020 Ford and Chrysler models, particularly in the F-150, Ram 1500, and Dodge Charger. It's advisable to check for any recalls or Technical Service Bulletins (TSBs) related to this code.

How can I prevent U017F from happening again?

Regular vehicle maintenance, including inspections of wiring and connectors, can prevent U017F. Additionally, keeping your vehicle’s software updated and ensuring proper battery health can help avoid future issues.

What is U017F?

The U017F diagnostic trouble code (DTC) indicates a communication failure between the vehicle's primary control modules and the Vehicle Communication Module (VCM). This code is often seen in a variety of Ford and Chrysler vehicles, particularly those manufactured between 2015 and 2020. When the U017F code is triggered, it signifies that the Engine Control Module (ECM) or other modules are unable to receive or send data to the VCM. This can lead to several operational issues, such as the inability to access certain vehicle functions, impaired engine performance, or even complete loss of communication with the onboard diagnostics system. As a car owner, you may notice your check engine light illuminating, or you might experience problems such as erratic behavior in the vehicle's electrical systems. Ignoring this code can result in more serious issues over time, including compromised safety features or decreased fuel efficiency. Therefore, it’s crucial to address this issue promptly by diagnosing the root cause and performing necessary repairs. Regular checks using a diagnostic tool like GeekOBD can help catch these problems early.

System: U - Network (Communication, CAN Bus)

Symptoms

Common symptoms when U017F is present:

  • Check engine light stays on constantly, indicating a communication issue that may affect vehicle performance.
  • Engine hesitates during acceleration, leading to a sluggish response when pressing the gas pedal.
  • Fuel economy decreased by 10-15%, noticeable during regular fuel fill-ups.
  • Dashboard warning lights may illuminate intermittently, affecting driver awareness of vehicle conditions.
  • Inability to use certain features like cruise control or infotainment system, indicating a broader communication failure.

Possible Causes

Most common causes of U017F (ordered by frequency):

  1. {'cause': 'Faulty wiring or connectors (70%)', 'details': 'Worn out, frayed, or corroded wiring can disrupt communication, making this the most common cause.'}
  2. {'cause': 'Malfunctioning Vehicle Communication Module (20%)', 'details': 'Defective VCM can fail to process signals from other modules, leading to code U017F.'}
  3. {'cause': 'Software issues (5%)', 'details': 'Outdated software in the ECM or VCM can cause compatibility issues, which can be resolved with a simple update.'}
  4. {'cause': 'Power supply problems (3%)', 'details': 'Insufficient power to the VCM due to a weak battery or poor connections can lead to this code.'}
  5. {'cause': 'Rare communication failure (2%)', 'details': 'Intermittent communication failures may occur due to environmental factors affecting the VCM.'}

U017F Repair Costs

Cost Breakdown by Repair Type

Wiring Repair

Repair or replace damaged wiring and connectors.

  • Total: $100 - $500
  • Success rate: 90%
Vehicle Communication Module Replacement

Replacing the faulty VCM with a new unit.

  • Total: $300 - $700
  • Success rate: 85%
Software Update

Updating the ECM or VCM software to resolve communication issues.

  • Total: $50 - $150
  • Success rate: 75%
Money-Saving Tips for U017F
  • 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 U017F Diagnosis Process

Follow these systematic steps to accurately diagnose U017F. 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 the VCM and wiring (20-30 minutes)

Step 3: Component testing - Use a multimeter or specific diagnostic tools to test suspected components such as the VCM 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 to see if it reoccurs (10-15 minutes)

Step 4: System function test - Verify proper operation after repairs and clear codes to see if it reoccurs (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 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).

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: Repairing a U017F Code in a 2017 Ford F-150

Vehicle: 2017 Ford F-150, 50,000 miles

Problem: Customer reported the check engine light was on and experienced erratic electrical system behavior.

Diagnosis: After performing a scan with GeekOBD, the U017F code was identified along with several other communication errors. A visual inspection revealed corroded connectors.

Solution: Replaced corroded connectors and repaired wiring. Cleared the codes and performed a system function test.

Cost: $300 (breakdown: $200 for parts, $100 for labor)

Result: Customer reported all systems functioning properly, and the check engine light remained off post-repair.

Case Study 2: Resolving U017F in a 2018 Chrysler 300

Vehicle: 2018 Chrysler 300, 30,000 miles

Problem: Customer noticed the infotainment system was unresponsive, and the check engine light was illuminated.

Diagnosis: GeekOBD scan confirmed U017F. The diagnostic steps showed that the VCM was not communicating effectively.

Solution: Replaced the VCM and updated the ECM software. Cleared the codes and performed a thorough road test.

Cost: $600 (breakdown: $400 for VCM, $200 for labor)

Result: Infotainment system and vehicle functions returned to normal, with no further issues reported.

Diagnose U017F

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  • Professional-grade analysis
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Code Information

Code: U017F
System: Network (Communication, CAN Bus)
Severity: HIGH
Category: Network Codes