ChassisC1780

Caution

Severity: Caution - get it checked when you can

Loss of steering position signal

4 brands affected · Description from GM 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 steering system. Steering effort may increase.

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

Steering effort may increase. If the steering feels heavy or unpredictable, stop safely and have it checked.

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 4

Brand	Code	Description	System
GM	C1780	Loss of steering position signal Brand	Chassis
Mitsubishi	C1780	Acceleration signal fail Brand	Chassis
Proton	C1780	Acceleration signal fail Brand	Chassis
Saab	C1780	Loss Of Steering Position Signal 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 1

These 7-character codes are manufacturer-specific variants of C1780 and may be reported by some scan tools.

Brand	Code	Description	System
SsangYong	C178000	Switch failure detection (Key in line failure) Brand	Chassis

6Related codes

Browse Cxxx codes or C178xx codes.