U0924 - Communication Error in Vehicle Network - Common in 2015-2020 Ford and Chevy Models

Quick Answer

U0924 means: U0924 indicates a communication error between vehicle control modules.

Fix: Check and replace faulty components Cost: $150 - $600 Time: 90-180 minutes

Can I drive with U0924? Address immediately to prevent potential safety issues.

Common Questions

What does U0924 mean and how does it affect my car?

The U0924 code signals a communication error in your vehicle's network, which can lead to various performance issues. If this code appears, your car might display warning lights, lose power steering, or experience electronic malfunctions. Addressing this promptly can prevent further damage and maintain safe vehicle operation.

What are the most common causes of U0924 and how much does it cost to fix?

Common causes include damaged wiring (cost: $150-$600), malfunctioning control modules (cost: $500-$1,500), and poor connections. Repair costs vary based on the specific issue, but proactive diagnostics can save you time and money.

Can I drive my car with U0924 or should I stop immediately?

It is not advisable to drive your vehicle with U0924 as it may affect critical systems like power steering and brakes. It's best to have it diagnosed and repaired immediately to avoid safety risks.

How can I diagnose U0924 myself using GeekOBD APP?

Using the GeekOBD APP, connect your device to the OBD2 port, read all diagnostic trouble codes, and identify U0924. Check the freeze frame data to understand when the issue occurred, and inspect wiring and connections based on the results.

What vehicles are most commonly affected by U0924?

U0924 is frequently reported in 2015-2020 Ford F-Series, Chevrolet Silverado, and GMC Sierra models. Always check for any associated recalls or technical service bulletins (TSBs) related to communication errors in these vehicles.

How can I prevent U0924 from happening again?

Regular maintenance, including checking and cleaning electrical connections, inspecting wiring for wear or corrosion, and ensuring software updates for modules can help prevent U0924 from recurring.

What is U0924?

The diagnostic trouble code (DTC) U0924 indicates a communication error within the vehicle's network. This code typically occurs when one or more control modules are unable to communicate properly with the other modules or the vehicle's computer network. In practical terms, this could manifest in several ways, including warning lights on the dashboard, malfunctioning components, or a complete failure of certain electrical systems. Vehicles from manufacturers like Ford, Chevrolet, and GMC often report this code, particularly in models manufactured between 2015 and 2020. The U0924 code can lead to issues such as problems with power steering, anti-lock brakes, or even the fuel management system. If left unresolved, it can result in diminished vehicle performance, safety concerns, and potential costly repairs. Understanding the implications of this code is crucial for maintaining your vehicle's health and safety. A vehicle exhibiting symptoms associated with U0924 should be diagnosed and repaired promptly to avoid further complications and ensure optimal performance.

System: U - Network (Communication, CAN Bus)

Symptoms

Common symptoms when U0924 is present:

  • The check engine light is illuminated, staying on consistently, indicating a communication fault.
  • The vehicle experiences intermittent loss of power steering assist, making steering difficult and unsafe.
  • Warning messages appear on the dashboard, such as 'Service Stabilitrak' or 'Service Power Steering,' affecting driver confidence.
  • Random electronic malfunctions occur, such as non-responsive power windows or locks.
  • The vehicle's fuel economy decreases significantly, often by 10-15%, due to malfunctioning engine management systems.

Possible Causes

Most common causes of U0924 (ordered by frequency):

  1. The most common cause of U0924 is a faulty or damaged wiring harness, which has a 40% likelihood of being the issue. Wiring can wear out or become corroded over time, especially in older vehicles.
  2. Second, a malfunctioning control module, such as the Engine Control Module (ECM) or Body Control Module (BCM), can cause a communication breakdown. This has a likelihood of about 30%. These modules may require reprogramming or replacement.
  3. Thirdly, poor connections or loose plugs at various control modules can lead to intermittent communication failures, which can be easily fixed by ensuring all connections are tight and free of corrosion.
  4. A less common but serious cause could be an internal failure of the vehicle's onboard diagnostics system, which could necessitate extensive repairs.
  5. Rarely, external factors like water intrusion or electromagnetic interference can disrupt communication between modules, leading to U0924.

U0924 Repair Costs

Cost Breakdown by Repair Type

Wiring Harness Repair/Replacement

Repairing or replacing damaged wiring can solve communication issues.

  • Total: $150 - $600
  • Success rate: 85%
Control Module Replacement

Replacing a faulty ECM or BCM can restore communication.

  • Total: $500 - $1,500
  • Success rate: 90%
Diagnostic Scan and Labor

Comprehensive diagnostic services to pinpoint the issue.

  • Total: $100 - $200
  • Success rate: 70%
Money-Saving Tips for U0924
  • 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 U0924 Diagnosis Process

Follow these systematic steps to accurately diagnose U0924. 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, such as control modules (20-30 minutes)

Step 3: Component testing - Use a multimeter or specific diagnostic tools to test suspected components, such as control modules (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 to see if they return (10-15 minutes)

Step 4: System function test - Verify proper operation after repairs and clear codes to see if they return (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 and monitor for any returning symptoms (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and monitor for any returning symptoms (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: Ford F-150 Communication Issue Resolved

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

Problem: Customer complained of losing power steering intermittently and illuminated warning lights.

Diagnosis: Performed a diagnostic scan revealing U0924 along with other codes. Visual inspection found frayed wiring in the steering module.

Solution: Replaced damaged wiring harness and performed a system reset.

Cost: $350 (parts: $150 for wiring, $200 labor)

Result: Customer reported no further issues after repairs, and all systems operated normally.

Case Study 2: Chevrolet Silverado ECM Replacement

Vehicle: 2019 Chevrolet Silverado, 30,000 miles

Problem: Customer experienced dashboard warning lights and erratic power steering.

Diagnosis: Diagnostic scan revealed U0924. Further testing indicated a malfunctioning ECM.

Solution: Replaced the ECM and reprogrammed it to the vehicle.

Cost: $1,200 (parts: $800 for ECM, $400 labor)

Result: Post-repair, the vehicle operated without issues, and the customer was satisfied with the performance.

Diagnose U0924

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: U0924
System: Network (Communication, CAN Bus)
Severity: HIGH
Category: Network Codes