U0E71 - Understanding DTC U0E71: Common Causes and Solutions for 2015-2019 Ford Models

Quick Answer

U0E71 means: U0E71 indicates a communication problem between vehicle control modules.

Fix: Check and replace faulty components Cost: $300 - $800 Time: 90-180 minutes

Can I drive with U0E71? Address immediately to prevent further issues.

Common Questions

What does U0E71 mean and how does it affect my car?

The U0E71 code signifies a communication error between your vehicle's control modules, which can affect various electrical systems and overall performance. If left unresolved, it may lead to safety risks, such as failure of critical components like lights or security systems.

What are the most common causes of U0E71 and how much does it cost to fix?

Common causes include a faulty body control module, wiring issues, or software glitches. Repair costs can range from $100 for wiring repairs to $800 for BCM replacement, depending on the severity of the problem.

Can I drive my car with U0E71 or should I stop immediately?

While it may be possible to drive with the U0E71 code, it's advisable to address it promptly to avoid further complications. Ignoring the warning could compromise vehicle safety and functionality.

How can I diagnose U0E71 myself using GeekOBD APP?

To diagnose U0E71, connect the GeekOBD APP to your vehicle's OBD2 port. Perform a scan to retrieve codes and view freeze frame data. This information will help you understand the context of the fault and guide you in troubleshooting.

What vehicles are most commonly affected by U0E71?

The U0E71 code is often found in various Ford models from 2015 to 2019. Owners of these vehicles should be vigilant for symptoms associated with this code, as they may indicate underlying communication issues.

How can I prevent U0E71 from happening again?

To prevent the U0E71 code from reoccurring, ensure regular maintenance checks of electrical systems, update software when available, and address any wiring issues immediately to prevent further damage.

What is U0E71?

The U0E71 diagnostic trouble code indicates a communication issue within the vehicle's control modules, particularly between the body control module (BCM) and other systems such as the powertrain control module (PCM). This code often stems from a software glitch, wiring issues, or faulty components that hinder communication. For owners of 2015-2019 Ford models, this code can manifest through various symptoms, including electrical malfunctions, warning lights, and performance problems. The implications of ignoring this code can be significant, ranging from minor inconveniences to safety risks, as it may affect critical vehicle functions like lighting, security systems, and overall drivability. Addressing U0E71 promptly is crucial to ensuring the vehicle operates as intended and to prevent potential cascading failures in related systems. If you see this code, it's advisable to have a professional diagnostic performed to accurately identify the root cause and implement necessary repairs.

System: U - Network (Communication, CAN Bus)

Symptoms

Common symptoms when U0E71 is present:

The check engine light may illuminate and remain on continuously, indicating a fault that needs attention.
You might experience erratic behavior of electrical systems, such as lights flickering or inconsistent operation of power windows.
Drivers may notice a significant decrease in fuel economy, potentially as much as 10-15%, due to improper engine management.
In some cases, remote keyless entry may become unresponsive, preventing you from locking or unlocking the vehicle.
Performance issues such as stalling or hesitation during acceleration may occur, affecting overall drivability.

Possible Causes

Most common causes of U0E71 (ordered by frequency):

{'cause': 'The most common cause is a faulty body control module (BCM), with about 40% likelihood. This often requires replacement or reprogramming to restore communication.', 'details': 'Issues with the BCM can lead to multiple systems malfunctioning, as it serves as a communication hub for various modules.'}
{'cause': 'Poor wiring connections or damaged harnesses account for roughly 30% of cases. Corrosion or wear can disrupt signals.', 'technicalExplanation': 'Inspecting wiring and connectors is crucial, as loose connections can lead to intermittent issues that trigger the U0E71 code.'}
{'cause': 'Software glitches in one or more control modules can result in a 20% occurrence rate. Updating the firmware can often resolve this.', 'preventionTips': "Keeping your vehicle's software updated can mitigate these issues, along with regular diagnostics using tools like the GeekOBD APP."}
{'cause': 'Less common, but serious, is a failing powertrain control module (PCM). This may lead to more severe performance issues.', 'details': 'If diagnosed, replacing the PCM can be costly but is essential for proper vehicle operation.'}
{'cause': "A rare cause could be a short circuit in the vehicle's electrical system, which may require extensive troubleshooting.", 'details': 'Given the complexity, seeking professional assistance is advisable if this is suspected.'}

U0E71 Repair Costs

Cost Breakdown by Repair Type

BCM Replacement

Replacing the body control module, which is often necessary to resolve U0E71.

Total: $300 - $800
Success rate: 85%

Wiring Repair

Repairing or replacing damaged wiring or connectors that cause communication failure.

Total: $100 - $300
Success rate: 75%

Software Update

Performing a software update on the vehicle's control modules can often resolve communication errors.

Total: $50 - $150
Success rate: 70%

Money-Saving Tips for U0E71

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 U0E71 Diagnosis Process

Follow these systematic steps to accurately diagnose U0E71. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Conduct an initial visual inspection to check for obvious signs of damage like frayed wires, loose connectors, or corrosion on connectors (5-10 minutes)

Step 1: Conduct an initial visual inspection to check for obvious signs of damage like frayed wires, loose connectors, or corrosion on connectors (5-10 minutes).