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Engine-Codes – Generic – U1024

U1024 Code - VVEL Control Module CAN Communication

Quick Answer

The U1024 code indicates a communication issue within the VVEL (Variable Valve Event and Lift) control module through the CAN (Controller Area Network) bus. Common causes include Faulty VVEL control module, Wiring or connectivity issues in the CAN bus, Loose or corroded connections in the VVEL system. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
U1024 indicates VVEL Control Module CAN Communication.
Common causes
Common causes include Faulty VVEL control module, Wiring or connectivity issues in the CAN bus, Loose or corroded connections in the VVEL system.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 08, 2024
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Code U1024 Description

The U1024 code indicates a communication issue within the VVEL (Variable Valve Event and Lift) control module through the CAN (Controller Area Network) bus. The VVEL system is responsible for controlling the timing and lift of the engine's intake valves, optimizing performance and efficiency. When there is a communication problem with the VVEL control module, it can lead to various issues affecting the vehicle's performance.

OBDII Code U1024 - VVEL Control Module CAN Communication
U1024 Code - VVEL Control Module CAN Communication

Common Causes of U1024

  1. Faulty VVEL control module
  2. Wiring or connectivity issues in the CAN bus
  3. Loose or corroded connections in the VVEL system
  4. Software glitches or programming errors
  5. Electrical interference or short circuits

Symptoms of U1024

  1. Check engine light illuminated on the dashboard
  2. Reduced engine performance and acceleration
  3. Rough idling or stalling
  4. Decreased fuel efficiency
  5. Vehicle going into limp mode

How to Fix U1024

  1. Begin by diagnosing the specific cause of the communication issue, using a diagnostic scanner to read and interpret the trouble codes.
  2. Inspect the wiring and connections in the CAN bus and VVEL system for any signs of damage, corrosion, or loose connections. Repair or replace as needed.
  3. Check the VVEL control module for any faults or malfunctions. Replace the module if necessary.
  4. Clear the trouble codes from the vehicle's computer system and perform a test drive to ensure the issue has been resolved.
  5. If the problem persists, seek assistance from a professional mechanic or dealership for further diagnosis and repair.

Cost to Fix U1024

The cost of repairing a U1024 code can vary depending on the specific cause of the issue and the labor rates in your area. On average, repairing a communication problem within the VVEL control module could range from $200 to $500, including parts and labor. However, it's essential to keep in mind that diagnostic time and labor rates can fluctuate based on location, vehicle make and model, and the complexity of the repair. It's recommended to obtain a few quotes from different auto repair shops to get a more accurate estimate for your specific situation.

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Code U1024 Information for Specific Makes

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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