ChassisC0543

Serious

Severity: Serious - have it checked soon

Brake pressure sensor 'B' circuit high

10 brands affected · Description from Toyota data.

Key terms: ABS: anti-lock braking, which stops the wheels locking · Stability control: helps stop the car skidding · Wheel speed sensor: measures how fast each wheel turns

Safety: This code relates to the braking system or brake assist. Braking may be affected.

1What it means in plain English

A chassis system has a fault, usually ABS, traction control or stability control, but some makes use this range for airbags, electric power steering or park brakes.

2Common causes

Faulty wheel speed sensor
Damaged sensor ring or wiring
Faulty ABS module
Low brake fluid
Wheel bearing damage

3Can I drive?

Serious · drive with care

Have it checked immediately: brakes or brake assistance may be affected. Do not drive if the pedal feels soft or hard, the car pulls when braking, or the brake warning light is on.

This page gives general information. It is not professional advice. For a definite diagnosis and a repair quote, ask a qualified mechanic to inspect the car.

4Brand data 10

Brand	Code	Description	System
Ashok Leyland CV	C0543	No description available	Chassis
Daewoo	C0543	No description available	Chassis
EOBD	C0543	Remdruksensor 'B' circuit hoog Brand	Chassis
GM	C0543	Rear steering motor position error Brand	Chassis
Holden	C0543	Rear Steering Motor Position Brand	Chassis
Land Rover	C0543	Brake Pressure Sensor 'B' Circuit High - Signal Stuck High Brand	Chassis
Opel	C0543	Rear steering motor position error Brand	Chassis
Peugeot	C0543	No description available	Chassis
Saab	C0543	Errore posiz. motor.sterzo post Brand	Chassis
Toyota	C0543	Brake pressure sensor 'B' circuit high Brand	Chassis

Legend: SAE is the generic J2012 description; Brand is text taken from that manufacturer’s data. Manufacturer rows keep the wording and language of the source data, and non-English text is tagged so screen readers pronounce it correctly.

5Extended variant codes 2

These 7-character codes are manufacturer-specific variants of C0543 and may be reported by some scan tools.

Brand	Code	Description	System
Mercedes-Benz	C054300	Brake Pressure Sensor 'B' Circuit High Brand	Chassis
Mercedes-Benz	C054304	Brake Pressure Sensor 'B' Circuit High System Internal Failure Brand	Chassis

6Related codes

Browse Cxxx codes or C054xx codes.