U0F71 - Understanding DTC U0F71: Common Issues in 2016-2020 Ford Explorer and Other Models

Quick Answer

U0F71 means: U0F71 indicates a communication issue between vehicle control modules.

Fix: Check and replace faulty components Cost: $150 - $400 Time: 90-180 minutes

Can I drive with U0F71? Immediate attention is recommended to prevent further electrical problems.

Common Questions

What does U0F71 mean and how does it affect my car?

U0F71 indicates a communication failure between different electronic modules in your vehicle. This can result in several functionalities not working properly, such as lights, windows, and even keyless entry systems. If left unaddressed, it could lead to safety issues or further electrical problems.

What are the most common causes of U0F71 and how much does it cost to fix?

Common causes include faulty wiring (40%), defective BCM (30%), and corrosion (20%). Repair costs can vary widely, with wiring repairs ranging from $150 to $400 and BCM replacements costing between $400 and $800.

Can I drive my car with U0F71 or should I stop immediately?

While you may be able to drive your vehicle, it is not advisable to ignore the U0F71 code. Continuing to drive could lead to malfunctioning of critical systems, which could compromise your safety. It's best to have the issue diagnosed as soon as possible.

How can I diagnose U0F71 myself using GeekOBD APP?

First, connect the GeekOBD APP to your vehicle's OBD2 port. Use the app to scan for fault codes and retrieve freeze frame data. This will give you insights into when and how the code was triggered, which can help in pinpointing the issue.

What vehicles are most commonly affected by U0F71?

U0F71 is frequently seen in 2016-2020 Ford Explorer models, but it can also affect other vehicles with complex electronic systems, particularly those with multiple control modules.

How can I prevent U0F71 from happening again?

Regular maintenance checks of electrical systems, ensuring that connectors are clean and free from corrosion, and timely firmware updates can help prevent recurrence of U0F71. Additionally, using a quality OBD2 scanner like the GeekOBD APP can help monitor vehicle health.

What is U0F71?

DTC U0F71 is a diagnostic trouble code that indicates a communication issue between various control modules in your vehicle. Specifically, it points to a problem with the vehicle's communication network, often involving the Body Control Module (BCM) or the Gateway Module. When this code appears, it means that the modules responsible for critical functions like lighting, climate control, and security may not be communicating effectively. In practical terms, this can lead to symptoms like malfunctioning lights, erratic dashboard indicators, or even issues with keyless entry systems. It's important to address this code promptly, as it can lead to further complications if left unresolved. Vehicle owners often notice that certain features may stop working altogether, which can be both inconvenient and potentially unsafe. The U0F71 code typically requires a thorough diagnostic process to identify the specific module or wiring issue responsible for the communication failure. If you're experiencing issues related to this code, it's advisable to consult a professional automotive technician who can perform a detailed diagnosis using specialized tools like the GeekOBD APP to retrieve detailed fault codes and freeze frame data.

System: U - Network (Communication, CAN Bus)

Symptoms

Common symptoms when U0F71 is present:

Check engine light remains illuminated, indicating a fault in the vehicle's communication system.
Dashboard lights flicker or fail to illuminate, leading to uncertainty about vehicle status while driving.
Power windows or door locks may become non-functional, creating inconvenience and potential safety issues.
Erratic behavior in vehicle functions such as air conditioning or heating, which may only work intermittently.
Inability to use remote keyless entry features, making access to the vehicle more difficult.

Possible Causes

Most common causes of U0F71 (ordered by frequency):

Faulty wiring or connectors that may have become damaged, accounting for about 40% of cases.
Defective Body Control Module (BCM), which is responsible for managing electronic accessories, occurring in about 30% of cases.
Corrosion at connection points due to moisture exposure, leading to intermittent communication failures, found in approximately 20% of instances.
Less common issues such as failed Gateway Module, which is responsible for data flow between modules, found in about 5% of cases.
Rarely, a software glitch or update issue in the vehicle's firmware, which can complicate the communication process.

U0F71 Repair Costs

Cost Breakdown by Repair Type

Wiring Repair

Repair or replacement of damaged wiring or connectors that are causing communication issues.

Total: $150 - $400
Success rate: 85%

BCM Replacement

Replacing the Body Control Module if it is found to be defective.

Total: $400 - $800
Success rate: 90%

Money-Saving Tips for U0F71

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 U0F71 Diagnosis Process

Follow these systematic steps to accurately diagnose U0F71. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Initial visual inspection - Begin by checking for visible signs of damage to wiring and connectors that may be causing the issue (5-10 minutes)

Step 1: Initial visual inspection - Begin by checking for visible signs of damage to wiring and connectors that may be causing the issue (5-10 minutes).