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Home >> Lexus >> 2021 >> ES 350 Luxury >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> Parking Support Brake System (Except Hybrid) - Diagnostic Codes >> PARKING SUPPORT BRAKE SYSTEM (for Gasoline Model) >> DTC C1A4B: Stop Light Relay Circuit [06/2018 - 09/2022] >> Description

DTC C1A4B: Stop Light Relay Circuit [06/2018 - 09/2022]: Description

When a stop light relay circuit malfunction signal sent from the electronically controlled brake system is detected by the clearance warning ECU assembly, DTC C1A4B is stored.

DTC No. Detection Item DTC Detection Condition Trouble Area
C1A4B Stop Light Relay Circuit Stop light relay circuit malfunction Electronically controlled brake system
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