U0E38 - Understanding the U0E38 Code and Its Impact on Vehicles like 2017-2020 Ford Explorer and 2016-2019 Lincoln MKX

Quick Answer

U0E38 means: U0E38 indicates a communication issue between vehicle control modules.

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

Can I drive with U0E38? It’s important to diagnose and address the U0E38 code as soon as possible to prevent further issues.

Common Questions

What does U0E38 mean and how does it affect my car?

The U0E38 code indicates a communication failure between your vehicle's control modules. This can result in various driving issues such as reduced power, erratic behavior of safety features, or even affecting your vehicle's start-up process.

What are the most common causes of U0E38 and how much does it cost to fix?

Common causes include faulty wiring (40% likelihood), software issues, and malfunctioning control modules. Repair costs can range from $100 for wiring repairs up to $1500 for module replacements, depending on the specific issue.

Can I drive my car with U0E38 or should I stop immediately?

While some drivers may continue to operate their vehicles, it's advised to address the U0E38 code as soon as possible. Ignoring it can lead to more significant issues, including complete module failure or unsafe driving conditions.

How can I diagnose U0E38 myself using GeekOBD APP?

To diagnose U0E38 with the GeekOBD APP, start by connecting it to your vehicle's OBD2 port. Run a full system scan to retrieve all codes and freeze frame data, which can help you understand the context of the problem.

What vehicles are most commonly affected by U0E38?

The U0E38 code is frequently encountered in vehicles such as the 2017-2020 Ford Explorer and the 2016-2019 Lincoln MKX, particularly following software updates or after electrical repairs.

How can I prevent U0E38 from happening again?

To prevent the U0E38 code from recurring, ensure regular maintenance of your vehicle's electrical systems, keep software updated, and avoid aftermarket modifications that can disrupt factory settings.

What is U0E38?

The U0E38 diagnostic trouble code (DTC) is a manufacturer-specific code that indicates a communication issue within the vehicle's network. Specifically, this code suggests that there is a problem related to the vehicle's control modules, which are responsible for various functions, including engine management, transmission control, and electronic stability. When the U0E38 code appears, it typically means that the powertrain control module (PCM) cannot effectively communicate with one or more other modules in the vehicle. This lack of communication can lead to a range of operational issues, such as reduced engine performance, erratic transmission behavior, or even failure of safety features like stability control. For instance, in 2017-2020 Ford Explorers and 2016-2019 Lincoln MKXs, this code might arise after a software update or when there's a failure in wiring or connectors. Ignoring the U0E38 code can lead to more severe issues over time, as communication problems can affect the entire vehicle's performance. Therefore, addressing this code promptly is crucial to ensure your vehicle operates smoothly and safely.

System: U - Network (Communication, CAN Bus)

Symptoms

Common symptoms when U0E38 is present:

  • The check engine light may illuminate and remain on, indicating a need for diagnostic attention.
  • Drivers might experience erratic shifting in the transmission, which can feel like the vehicle is hesitating or struggling during acceleration.
  • Fuel economy could noticeably decrease, potentially by 10-15%, due to the engine running inefficiently.
  • The vehicle may exhibit unusual behavior with stability control systems, such as warning lights activating unexpectedly.
  • In some cases, the vehicle might fail to start or experience intermittent starting issues due to communication failures.

Possible Causes

Most common causes of U0E38 (ordered by frequency):

  1. {'cause': 'Faulty wiring or connectors between control modules', 'likelihood': '40%', 'details': 'Deterioration or damage to wiring can disrupt communication, making this the most common cause.'}
  2. {'cause': 'Software issues or outdated firmware in control modules', 'technicalExplanation': 'Sometimes, a simple software update can resolve the U0E38 code, particularly in modern vehicles equipped with advanced infotainment and control systems.'}
  3. {'cause': 'Malfunctioning control module (e.g., PCM)', 'preventionTips': 'Regularly check vehicle software updates and ensure that any electrical repairs are conducted by a qualified technician.'}
  4. {'cause': 'Corrosion or moisture in connectors', 'description': 'This less common issue can lead to communication problems, particularly in vehicles exposed to harsh environments.'}
  5. {'cause': 'Aftermarket modifications or installations', 'description': 'Rarely, aftermarket parts can interfere with factory settings, leading to the U0E38 code.'}

U0E38 Repair Costs

Cost Breakdown by Repair Type

Wiring Repair

Repair or replace damaged wiring and connectors to restore communication between modules.

  • Total: $100 - $300
  • Success rate: 85%
Control Module Reprogramming

Reprogramming or updating the vehicle's control modules to ensure proper communication.

  • Total: $150 - $400
  • Success rate: 75%
Control Module Replacement

Replacing a faulty control module that is causing communication issues.

  • Total: $600 - $1500
  • Success rate: 90%
Money-Saving Tips for U0E38
  • 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 U0E38 Diagnosis Process

Follow these systematic steps to accurately diagnose U0E38. 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 multimeter or specific diagnostic tools to test suspected components (20-30 minutes)

Step 3: Component testing - Use multimeter or specific diagnostic tools to test suspected components (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 (10-15 minutes)

Step 4: System function test - Verify proper operation after repairs and clear 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: 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: Wiring Repair on a 2018 Ford Explorer

Vehicle: 2018 Ford Explorer, 45,000 miles

Problem: The customer reported that the car's check engine light was on, and the vehicle experienced frequent stalling.

Diagnosis: A thorough inspection revealed corroded wiring in the engine harness, causing poor communication between control modules.

Solution: Repaired the damaged wiring and cleaned the connectors to restore communication.

Cost: $250 (includes parts and labor)

Result: The check engine light was cleared, and the vehicle operated normally with no further issues.

Case Study 2: Control Module Reprogramming on a 2019 Lincoln MKX

Vehicle: 2019 Lincoln MKX, 30,000 miles

Problem: The vehicle exhibited erratic shifting and displayed a U0E38 code.

Diagnosis: Diagnostic tests indicated a need for reprogramming the powertrain control module due to an outdated software version.

Solution: Reprogrammed the PCM using dealer-specific diagnostic software.

Cost: $200

Result: After reprogramming, the vehicle's shifting improved significantly, and the U0E38 code did not return.

Diagnose U0E38

Use GeekOBD APP for professional diagnosis!

  • Real-time data monitoring
  • Advanced diagnostic features
  • Step-by-step repair guidance
  • Professional-grade analysis
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Code Information

Code: U0E38
System: Network (Communication, CAN Bus)
Severity: HIGH
Category: Network Codes