U1305 - High Or Low Voltage On Class 2 Serial Data Circuit

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What does this mean?

Possible causes

  • Repair other code first
  • Tech notes

    In most cases, the P1305 code is combined with other codes, fix other codes first.

    Possible symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)
  • U1305 Description

    Modules connected to the class 2 serial data circuit monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. In addition to this, Node Alive messages are transmitted by each module on the class 2 serial data circuit about once every 2 seconds. When the module detects one of the following conditions on the class 2 serial data circuit for approximately 3 seconds, the setting of all other class 2 serial communication DTCs is inhibited and a DTC will set.
    OBDII Code U1305 - High Or Low Voltage On Class 2 Serial Data Circuit - Engine-Codes.com

    U1305 Information for specific makes

  • U1305 BUICK High Or Low Voltage On Class 2 Serial Data Circuit
  • U1305 CADILLAC High Or Low Voltage On Class 2 Serial Data Circuit
  • U1305 CHEVROLET High Or Low Voltage On Class 2 Serial Data Circuit
  • U1305 GMC High Or Low Voltage On Class 2 Serial Data Circuit
  • U1305 PONTIAC High Or Low Voltage On Class 2 Serial Data Circuit
  • Related Information