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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 [06/2018 - 08/2020] >> Description

DTC B2456: Left Headlight ECU Variation Error [06/2018 - 08/2020]: Description

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

AFS*1

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
HL AUTOLEVELING*2

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
  1. *1: for LED Type Turn Signal Light
  2. *2: for Bulb Type Turn Signal Light
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