ChassisC1025

Caution

Severity: Caution - get it checked when you can

Brake Primary Circuit Over Boost Pressure

14 brands affected · Description from Land Rover data.

Key terms: Boost pressure: extra air pressure made by a turbo or supercharger · 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. Have braking checked promptly.

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?

Caution · drive with care

The braking system may be affected. Have it checked promptly; if the pedal feels abnormal, the car pulls when braking, or a brake warning light is on, stop safely.

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 14

Brand	Code	Description	System
BAIC Motor	C1025	ECUInternal fault Brand	Chassis
Mercedes-Benz	C1025	No description available	Chassis
Daewoo	C1025	Front Left Wheel Speed Sensor Short Circuit or Circuit Open Brand	Chassis
DFFS	C1025	CPU fault Brand	Chassis
Geely	C1025	Front left wheel speed intermittent fault Brand	Chassis
Holden	C1025	No description available	Chassis
Isuzu	C1025	No description available	Chassis
Land Rover	C1025	Brake Primary Circuit Over Boost Pressure Brand	Chassis
Mahindra	C1025	HET RAM Check Failure Brand	Chassis
Peugeot	C1025	No description available	Chassis
MG (SAIC)	C1025	System Supplier Identifier Brand	Chassis
Smart	C1025	No description available	Chassis
Suzuki	C1025	Left-Front Wheel Speed Sensor Circuit Voltage Brand	Chassis
Tata	C1025	No description available	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 3

These 7-character codes are manufacturer-specific variants of C1025 and may be reported by some scan tools.

Brand	Code	Description	System
SsangYong	C102500	Wheel speed sensor front-RH phase Brand	Chassis
SsangYong	C102502	Wheel speed sensor front-RH phase Brand	Chassis
Mercedes-Benz	C10254A	HW/SW compatibility violation Brand	Chassis

6Related codes

Browse Cxxx codes or C102xx codes.