U0A64 - Understanding DTC U0A64: Common Issues in 2016-2020 Ford Fusions and Similar Models

Quick Answer

U0A64 means: U0A64 signifies a communication failure between vehicle control modules.

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

Can I drive with U0A64? Urgently address this issue to prevent safety risks and further damage.

Common Questions

What does U0A64 mean and how does it affect my car?

The U0A64 code indicates a communication failure within your vehicle’s electronic systems. This can lead to issues such as warning lights, erratic behavior of systems like stability control, and potential safety risks while driving. If left unaddressed, it may escalate into more severe electrical problems.

What are the most common causes of U0A64 and how much does it cost to fix?

The most frequent cause is faulty wiring, accounting for about 40% of cases, with repair costs ranging from $100 to $300. Other causes include a failing BCM, which can cost between $400 and $800 to replace, and software issues that may need updates costing around $100 to $150.

Can I drive my car with U0A64 or should I stop immediately?

It's advisable to stop driving your vehicle if you see the U0A64 code. While it may not cause immediate breakdowns, ignoring it can lead to unpredictable behavior of critical safety systems.

How can I diagnose U0A64 myself using GeekOBD APP?

Start by connecting the GeekOBD APP to your vehicle’s OBD2 port. Perform a full system scan to identify U0A64 and any related codes. Review the freeze-frame data for context and check the specific modules indicated in the diagnosis.

What vehicles are most commonly affected by U0A64?

Commonly affected models include the 2016-2020 Ford Fusion, Ford Escape, and other vehicles built on similar platforms during this timeframe. Always check for recalls or Technical Service Bulletins (TSBs) related to these issues.

How can I prevent U0A64 from happening again?

Regular maintenance checks on your vehicle's electrical system, ensuring all connections are clean and tight, can prevent U0A64. Using protective sprays on connectors and keeping the wiring harness free from wear and corrosion can also help.

What is U0A64?

The Diagnostic Trouble Code (DTC) U0A64 indicates a network communication issue within the vehicle’s system, specifically pointing to a problem with the vehicle's control modules. It is primarily associated with the vehicle’s electrical system, and it can lead to various malfunctions in the vehicle’s operation. Commonly seen in vehicles such as the Ford Fusion from 2016 to 2020, this code suggests that the communication between modules—like the Body Control Module (BCM) and other control units—has been disrupted or is failing. Drivers may notice several symptoms, including warning lights on the dashboard, erratic behavior of electrical components, or even failure of critical systems such as automatic braking or stability control. It's essential to address this code promptly because unresolved issues can lead to significant safety risks while driving, as well as potential damage to the vehicle's electrical system over time. Understanding the implications of U0A64 is crucial for vehicle owners, especially those who rely heavily on advanced driver-assistance systems (ADAS) and other modern amenities that depend on seamless communication between vehicle systems.

System: U - Network (Communication, CAN Bus)

Symptoms

Common symptoms when U0A64 is present:

  • The check engine light remains illuminated, indicating a fault in the vehicle's electrical system.
  • Erratic behavior of dashboard controls, such as the radio or climate control, which may malfunction or reset unexpectedly.
  • Automatic braking or stability control systems may engage at inappropriate times, leading to potential safety hazards.
  • Inconsistent operation of power windows or locks, which may fail to respond or operate sluggishly.
  • Decreased fuel efficiency due to improper functioning of the engine management systems.

Possible Causes

Most common causes of U0A64 (ordered by frequency):

  1. A faulty wiring harness or poor connections is the most common cause (approx. 40%), often stemming from wear and tear or improper installation.
  2. A failing Body Control Module (BCM) can lead to network communication failures, which is a technical issue that might require module reprogramming or replacement.
  3. Corrosion at electrical connectors can prevent proper communication between modules, so regular maintenance checks are essential to prevent this.
  4. Less common causes may include software glitches in the vehicle's control modules, which could require an update or reset through a diagnostic tool.
  5. Rarely, a malfunctioning powertrain control module (PCM) could lead to similar symptoms, but this is less frequently encountered.

U0A64 Repair Costs

Cost Breakdown by Repair Type

Wiring Repair

Repair of damaged wiring or connectors to restore proper communication between modules.

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

Replacing the Body Control Module if found faulty, often requiring reprogramming.

  • Total: $400 - $800
  • Success rate: 90%
Software Update

Updating the control module software to fix glitches or bugs.

  • Total: $100 - $150
  • Success rate: 75%
Money-Saving Tips for U0A64
  • 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 U0A64 Diagnosis Process

Follow these systematic steps to accurately diagnose U0A64. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Conduct an initial visual inspection of wiring and connectors for signs of wear, corrosion, or loose connections (5-10 minutes)

Step 1: Conduct an initial visual inspection of wiring and connectors for signs of wear, corrosion, or loose connections (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: Use the GeekOBD APP to perform an OBD2 scan, retrieving all diagnostic codes and freeze-frame data for better context (10-15 minutes)

Step 2: Use the GeekOBD APP to perform an OBD2 scan, retrieving all diagnostic codes and freeze-frame data for better 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: Test suspected components with a multimeter to check for proper voltage and continuity, focusing on the BCM and related wiring (20-30 minutes)

Step 3: Test suspected components with a multimeter to check for proper voltage and continuity, focusing on the BCM and related 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: Conduct a system function test following repairs to ensure all systems work correctly and clear any codes (10-15 minutes)

Step 4: Conduct a system function test following repairs to ensure all systems work correctly and clear any codes (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: Perform a road test under various driving conditions to confirm successful repairs and no reoccurrence of the U0A64 code (15-20 minutes)

Step 5: Perform a road test under various driving conditions to confirm successful repairs and no reoccurrence of the U0A64 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: Wiring Repair on 2018 Ford Fusion

Vehicle: 2018 Ford Fusion, 45,000 miles

Problem: Customer reported multiple dashboard warning lights and erratic power window operation.

Diagnosis: Diagnostic scan revealed U0A64 and visual inspection found damaged wiring near the BCM.

Solution: Repaired the wiring harness and secured connections.

Cost: $200

Result: Resolved communication issues and all systems functioned normally post-repair.

Case Study 2: BCM Replacement on 2017 Ford Escape

Vehicle: 2017 Ford Escape, 60,000 miles

Problem: Customer experienced loss of automatic braking feature and stability control warnings.

Diagnosis: U0A64 was confirmed after scanning; BCM was found to be faulty.

Solution: Replaced the BCM and reprogrammed it to work with the vehicle's systems.

Cost: $650

Result: All systems restored, and vehicle performance returned to optimal levels.

Diagnose U0A64

Use GeekOBD APP for professional diagnosis!

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  • Step-by-step repair guidance
  • Professional-grade analysis
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Code Information

Code: U0A64
System: Network (Communication, CAN Bus)
Severity: HIGH
Category: Network Codes