U0817 - Understanding Common Issues in 2015-2020 Ford F-150 and Chevrolet Silverado

Quick Answer

U0817 means: DTC U0817 indicates a communication problem between vehicle control modules.

Fix: Check and replace faulty components Cost: $300 - $1200 Time: 90-180 minutes

Can I drive with U0817? Immediate diagnostic and repair recommended to avoid further issues.

Common Questions

What does U0817 mean and how does it affect my car?

The U0817 code indicates a communication problem among your vehicle's control modules. If this code is present, it could lead to various operational issues, including affecting critical systems like the engine, transmission, and safety features. Ignoring this code can result in more significant problems and potentially compromise your vehicle's safety and performance.

What are the most common causes of U0817 and how much does it cost to fix?

Common causes of U0817 include faulty control modules, damaged wiring, and software glitches. Repair costs can vary widely, ranging from $50 for a software update to over $1200 for a control module replacement, depending on the severity and complexity of the issue.

Can I drive my car with U0817 or should I stop immediately?

While it may be possible to drive your vehicle with the U0817 code, it's not recommended. The communication failure could impact critical systems, leading to safety hazards. It's best to have the vehicle diagnosed and repaired promptly to avoid further complications.

How can I diagnose U0817 myself using GeekOBD APP?

To diagnose U0817 using the GeekOBD APP, first connect the OBD2 scanner to your vehicle's port. Open the app and run a full system scan to retrieve the trouble codes. Check the freeze frame data for context, and observe any related symptoms. This information will help you understand the severity of the issue and guide your next steps.

What vehicles are most commonly affected by U0817?

Vehicles commonly affected by the U0817 code include 2015-2020 Ford F-150, Chevrolet Silverado, and other models that use complex control systems. Always check for any recalls or Technical Service Bulletins (TSBs) related to communication issues for your specific model.

How can I prevent U0817 from happening again?

To prevent U0817 from recurring, regularly inspect and maintain your vehicle's wiring and connections, ensure software updates are performed as recommended, and address any electrical issues promptly. Keeping your vehicle clean and dry can also help prevent water intrusion that may lead to module failures.

What is U0817?

The DTC U0817 code is a communication error code that indicates a problem in the vehicle's controller area network (CAN). This code signifies that there is a malfunction in the communication between various control modules within your vehicle. Essentially, the vehicle's computer system relies on numerous modules to communicate with each other to ensure optimal performance and safety. When U0817 is triggered, it usually means that one of these modules isn't responding correctly or is unable to communicate effectively with others. This can lead to a variety of operational issues, including warning lights on the dashboard, improper functioning of safety features, or even performance issues while driving. For example, in models like the 2018 Ford F-150, you might notice erratic behavior in the engine performance, electrical system glitches, or problems with the infotainment system. Ignoring U0817 can lead to further complications down the road, including more severe electrical failures or safety risks, so timely diagnosis and repair are essential.

System: U - Network (Communication, CAN Bus)

Symptoms

Common symptoms when U0817 is present:

  • Check engine light illuminates and remains on, indicating a persistent issue that needs attention.
  • Poor engine performance, such as hard starting or hesitation during acceleration, which can lead to a frustrating driving experience.
  • Electrical issues, such as malfunctioning dashboard lights or infotainment system failures, making it difficult to use essential vehicle features.
  • Unresponsive safety features, which may include ABS or traction control, leading to compromised vehicle safety.
  • Decreased fuel efficiency, which can manifest as a drop in miles per gallon due to the vehicle running inefficiently.

Possible Causes

Most common causes of U0817 (ordered by frequency):

  1. The most common cause is a faulty or corrupted control module, accounting for about 40% of U0817 cases, often due to electrical issues or water intrusion.
  2. Another frequent cause involves damaged wiring or connectors, which can interfere with signals and communication between modules, leading to this code appearing.
  3. A third cause may be software glitches or outdated firmware in the vehicle's control modules; regularly updating your vehicle's software can help prevent this.
  4. Less common but serious causes could include severe fault in the CAN system itself, which may require extensive diagnostic testing and repairs.
  5. Rarely, a significant failure in the onboard diagnostic system can trigger this code, necessitating professional assistance for resolution.

U0817 Repair Costs

Cost Breakdown by Repair Type

Control Module Replacement

Replacing the faulty control module that is causing communication issues.

  • Total: $300 - $1200
  • Success rate: 85%
Wiring Repair

Repairing or replacing damaged wiring or connectors that are affecting communication.

  • Total: $100 - $500
  • Success rate: 75%
Software Update

Updating the vehicle's control module software to fix bugs or glitches.

  • Total: $50 - $200
  • Success rate: 90%
Money-Saving Tips for U0817
  • 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 U0817 Diagnosis Process

Follow these systematic steps to accurately diagnose U0817. 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 (20-30 minutes)

Step 3: Component testing - Use a 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: 2018 Ford F-150 U0817 Diagnosis and Repair

Vehicle: 2018 Ford F-150, 45,000 miles

Problem: Customer reported check engine light on and poor engine performance.

Diagnosis: After scanning with GeekOBD APP, U0817 was present along with several other codes. A visual inspection revealed corroded connectors.

Solution: Replaced the corroded connectors and updated the control module software.

Cost: $350 (diagnostic fee $50, parts $150, labor $150)

Result: The check engine light was cleared, and the vehicle performed well during a road test.

Case Study 2: 2019 Chevrolet Silverado U0817 Repair Case

Vehicle: 2019 Chevrolet Silverado, 30,000 miles

Problem: Customer experienced an unresponsive infotainment system and check engine light.

Diagnosis: Diagnostic scan showed U0817 and other communication errors. Testing indicated a faulty control module.

Solution: Replaced the faulty control module and performed system calibration.

Cost: $1100 (parts $950, labor $150)

Result: The infotainment system was fully operational again, and all systems were functioning correctly.

Diagnose U0817

Use GeekOBD APP for professional diagnosis!

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

Code: U0817
System: Network (Communication, CAN Bus)
Severity: HIGH
Category: Network Codes