DTC C1451: Motor Drive Permission Malfunction [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.

If air bleeding has not been performed, the skid control ECU (brake booster with master cylinder assembly) stores DTC C1451 to prevent the entry of air due to pump motor operation.

DTC C1451 is stored when Motor Invalid is selected, the system will not return to normal until the air bleeding procedure is performed.

DTC No.	Detection Item	INF Code	DTC Detection Condition	Trouble Area	MIL	Note
C1451	Motor Drive Permission Malfunction	1152	Either of the following is detected: Using the Techstream, "Motor Invalid" of the "ECB Utility" has been performed. The brake booster with master cylinder assembly has been replaced.	Air bleeding not performed	Only DTC C1451 (INF code 1152) is stored: Does not come on SAE Code C1451 is stored: Comes on	INF Code 1152: SAE Code C1451 Electronically controlled brake system DTC HINT: DTC C1451 (INF code 1152) is cleared when the conditions return to normal. ECB: Electronically Controlled Brake System

DTC No.

Detection Item

INF Code

DTC Detection Condition

Trouble Area

MIL

Note

C1451

Motor Drive Permission Malfunction

1152

Either of the following is detected:

Using the Techstream, "Motor Invalid" of the "ECB Utility" has been performed.
The brake booster with master cylinder assembly has been replaced.

Air bleeding not performed

Only DTC C1451 (INF code 1152) is stored: Does not come on
SAE Code C1451 is stored: Comes on

INF Code 1152: SAE Code C1451
Electronically controlled brake system DTC

HINT:

DTC C1451 (INF code 1152) is cleared when the conditions return to normal.
ECB: Electronically Controlled Brake System