U0F90 - Understanding DTC U0F90: Common in 2016-2020 Ford Explorer and Other Models

Quick Answer

U0F90 means: U0F90 indicates a communication error between vehicle control modules.

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

Can I drive with U0F90? Immediate attention is recommended to prevent further issues.

Common Questions

What does U0F90 mean and how does it affect my car?

The U0F90 code signifies a communication failure between your vehicle's control modules. This can affect various electronic systems, leading to erratic behavior, reduced performance, and safety concerns. It's crucial to address this code as it can lead to more significant problems if left unresolved.

What are the most common causes of U0F90 and how much does it cost to fix?

Common causes include damaged wiring, faulty control modules, and loose connections. Repair costs can range from $150 for wiring repairs to over $1,500 for control module replacements, depending on the specific issue and vehicle model.

Can I drive my car with U0F90 or should I stop immediately?

While you might be able to drive your vehicle, it's not advisable to ignore the U0F90 code. Continuing to drive with unresolved communication issues can lead to more severe problems, including safety risks. It's best to have the vehicle inspected as soon as possible.

How can I diagnose U0F90 myself using GeekOBD APP?

Using the GeekOBD APP, you can perform a diagnostic scan to retrieve the U0F90 code and any other related codes. The app also allows you to access freeze frame data, which provides context about the vehicle's performance at the time of the fault. This information can help you identify potential issues more accurately.

What vehicles are most commonly affected by U0F90?

The U0F90 code is commonly seen in vehicles such as the 2016-2020 Ford Explorer, Lincoln MKX, and certain Mazda models. These vehicles often have complex electronic systems that can be prone to communication issues.

How can I prevent U0F90 from happening again?

Routine maintenance, including checking connectors and wiring for wear and corrosion, can help prevent U0F90. Regular software updates from your dealership can also ensure that your vehicle's systems operate smoothly.

What is U0F90?

The U0F90 diagnostic trouble code (DTC) is a network communication issue that typically indicates a problem within the vehicle's communication bus system. This code is specifically associated with the control modules unable to communicate properly due to wiring issues, faulty components, or software discrepancies. When your vehicle's control modules, like the powertrain control module (PCM) or body control module (BCM), can't send or receive data correctly, it can lead to various operational issues. For instance, you may notice that certain electronic features, such as power windows or dashboard gauges, behave erratically or stop working altogether. The implications of a U0F90 code can range from minor inconveniences to significant safety concerns, particularly if critical systems fail to operate as intended. Cars like the 2016-2020 Ford Explorer and other vehicles from manufacturers like Lincoln and Mazda may exhibit this code due to their complex electronic systems. If you see the U0F90 code, it’s essential to address it promptly to avoid further complications and ensure your vehicle operates safely.

System: U - Network (Communication, CAN Bus)

Symptoms

Common symptoms when U0F90 is present:

  • The check engine light may illuminate and stay on constantly, indicating a fault in the vehicle's communication system.
  • You might experience erratic behavior of electronic features, such as power windows not responding or dashboard lights flickering.
  • Fuel economy may decrease as the engine control module struggles to optimize performance due to communication failures.
  • The vehicle may exhibit issues with starting, where it hesitates or fails to start properly due to communication errors.
  • You may notice delays in throttle response when accelerating, which can impact driving safety.

Possible Causes

Most common causes of U0F90 (ordered by frequency):

  1. The most common cause of the U0F90 code is damaged or corroded communication wiring, with a likelihood of around 60%. This can occur due to exposure to moisture or wear and tear over time.
  2. Another potential cause is a faulty control module, which may not be processing or relaying information correctly. This scenario has a 25% chance of being the issue.
  3. Improperly connected or loose connectors can also lead to the U0F90 code, with a 10% chance. Regular checks and maintenance can help prevent this.
  4. Less common but serious causes include software glitches in the vehicle’s control modules, which might require a firmware update from the manufacturer.
  5. A rare but possible cause is the failure of the vehicle’s central gateway module, which manages communication between various systems.

U0F90 Repair Costs

Cost Breakdown by Repair Type

Wiring Repair

Repairing damaged wiring and connectors to ensure proper communication.

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

Replacing a faulty control module that is not communicating properly.

  • Total: $500 - $1,500
  • Success rate: 90%
Software Update

Updating the vehicle's software to fix communication issues.

  • Total: $100 - $200
  • Success rate: 75%
Money-Saving Tips for U0F90
  • 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 U0F90 Diagnosis Process

Follow these systematic steps to accurately diagnose U0F90. 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 involved in communications (20-30 minutes)

Step 3: Component testing - Use a multimeter or specific diagnostic tools to test suspected components involved in communications (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 the vehicle under various conditions to confirm repair success and check for reoccurrence of the code (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and check for reoccurrence of the code (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: Repair Case: 2018 Ford Explorer U0F90 Code

Vehicle: 2018 Ford Explorer, 45,000 miles

Problem: Customer reported power windows malfunctioning and dashboard lights flickering.

Diagnosis: Performed a visual inspection and found corroded wiring in the door harness. The OBD2 scan confirmed the U0F90 code.

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

Cost: $320 (including labor and parts)

Result: The vehicle operated normally after repairs, and the customer reported no further issues.

Case Study 2: Repair Case: 2019 Lincoln MKX U0F90 Code

Vehicle: 2019 Lincoln MKX, 30,000 miles

Problem: Customer noticed the vehicle hesitating during acceleration and intermittent infotainment system failures.

Diagnosis: Found a software glitch during the diagnostic process and confirmed the U0F90 code.

Solution: Updated the vehicle's software to the latest version as recommended by the manufacturer.

Cost: $150 (software update fee)

Result: Post-repair, the vehicle's performance improved significantly, and the customer was satisfied.

Diagnose U0F90

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: U0F90
System: Network (Communication, CAN Bus)
Severity: HIGH
Category: Network Codes