ChassisC0542

Serious

Severity: Serious - have it checked soon

Brake Pressure Sensor B Circuit Low

11 brands affected · Generic SAE J2012 description.

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 · SAE J2012: the standard generic code list

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 11

Brand	Code	Description	System
Ashok Leyland CV	C0542	Brake Pressure Sensor B Circuit Low SAE	Chassis
Mercedes-Benz	C0542	Brake Pressure Sensor B Circuit Low SAE	Chassis
Daewoo	C0542	Brake Pressure Sensor B Circuit Low SAE	Chassis
EOBD	C0542	Remdruksensor 'B' circuit laag Brand	Chassis
GM	C0542	Brake Pressure Sensor B Circuit Low SAE	Chassis
Holden	C0542	Brake Pressure Sensor 2 Circuit Low Brand	Chassis
Land Rover	C0542	Brake Pressure Sensor 'B' Circuit Low - Signal Stuck Low Brand	Chassis
Opel	C0542	Brake Pressure Sensor B Circuit Low SAE	Chassis
Peugeot	C0542	Brake Pressure Sensor B Circuit Low SAE	Chassis
Saab	C0542	Brake Pressure Sensor B Circuit Low SAE	Chassis
Toyota	C0542	Brake pressure sensor 'B' circuit low 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 C0542 and may be reported by some scan tools.

Brand	Code	Description	System
Mercedes-Benz	C054200	Brake pressure sensor B has a short circuit to ground. Brand	Chassis
Mercedes-Benz	C054204	Brake pressure sensor B has a short circuit to ground. There is an internal fault. Brand	Chassis

6Related codes

Browse Cxxx codes or C054xx codes.