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Home >> Lexus >> 2023 >> ES 350 Base >> Repair and Diagnosis >> Accessories & Equipment >> Exterior Lights >> Lighting System (Ext) (Except Hybrid) - Diagnostic Codes (2 Of 2) & Symptom Tests >> LIGHTING SYSTEM (for Gasoline Model) >> DTC B2456: Left Headlight ECU Variation Error [08/2020 - ] >> Description

DTC B2456: Left Headlight ECU Variation Error [08/2020 - ]: Description

This DTC is stored if the headlight ECU sub-assembly LH for another destination is installed.

FOR LED TYPE TURN SIGNAL LIGHT

DTC No. Detection Item DTC Detection Condition Trouble Area DTC Output from
B2456 Left Headlight ECU Variation Error Detection condition: 
  1. The engine switch is on (IG).

Malfunction status: 
  1. Vehicle specification information received via CAN communication is continuously mismatched

Malfunction duration: 
  1. -
  • ECM
  • Main body ECU (multiplex network body ECU)
  • Headlight ECU sub-assembly LH
 AFS
FOR BULB TYPE TURN SIGNAL LIGHT

DTC No. Detection Item DTC Detection Condition Trouble Area DTC Output from
B2456 Left Headlight ECU Variation Error Detection condition: 
  1. The engine switch is on (IG).

Malfunction status: 
  1. Vehicle specification information received via CAN communication is continuously mismatched

Malfunction duration: 
  1. -
  • ECM
  • Main body ECU (multiplex network body ECU)
  • Headlight ECU sub-assembly LH
 HL AutoLeveling
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