U1024 - VVEL CAN communication

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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Possible causes

  • Faulty Variable Valve Event & Lift (VVEL) Control Module
  • VVEL Control Module harness is open or shorted
  • VVEL Control Module circuit poor electrical connection
  • Faulty Engine Control Module (ECM)
  • When is the code detected?

    When Variable Valve Event & Lift (VVEL) control module cannot transmit/receive can communication signal from Engine Control Module (ECM).

    Possible symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)
  • U1024 Description

    CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle multiplex communication line with high data communication speed and excellent error detection ability. Engine Control Module (ECM) and Variable Valve Event & Lift (VVEL) control module are connected with two communication lines (CAN H line and CAN L line) and transmit/receive data. ECM shares information and links with the VVEL control module during operation.
    OBDII Code U1024 - VVEL CAN communication - AutoCodes.com

    U1024 Information for specific makes

  • U1024 INFINITI VVEL CAN communication
  • U1024 NISSAN VVEL CAN communication
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