DTC C1427: Malfunction in Motor [06/2018 - ]: Description

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2024 Lexus ES 300h, 2023 Lexus ES 300h, 2022 Lexus ES 300h, 2021 Lexus ES 300h, and 2020 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.

When the power switch is on (READY), the stop light switch assembly off and the vehicle speed is 20 km/h (12 mph) or more, the skid control ECU (brake booster with master cylinder assembly) performs a self-diagnosis of the ABS motor relay circuit during the initial check of the actuator.

DTC No.	Detection Item	INF Code	DTC Detection Condition	Trouble Area	MIL	Note
C1427	Malfunction in Motor	1159	The pump motor built into the brake actuator assembly is not operating correctly.	Wire harness or connector Pump motor or pump motor circuit built into the brake actuator assembly	Comes on	INF Code 1159: SAE Code C1427 Electronically controlled brake system DTC