DTC B2420: HL AutoLeveling ECU Failure [09/2014 - 10/2018]: Description

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2018 Lexus RC 350, 2018 Lexus RC 300, 2017 Lexus RC 350, 2017 Lexus RC 300, and 2017 Lexus RC 200t. However, it is still accessible from the selected car via links, so may be relevant.

When the headlight leveling ECU assembly detects a malfunction in itself, this DTC is stored.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
B2420	HL AutoLeveling ECU Failure	Malfunction of headlight leveling ECU assembly	Headlight leveling ECU assembly