BodyB178D

Caution

Severity: Caution - get it checked when you can

SRS ECU fault

3 brands affected · Description from BYD data.

Key terms: Control module: a small computer that runs one part of the car

Safety: This code relates to the airbag or seat-belt restraint system. An airbag may not deploy in a crash.

1What it means in plain English

A body system has a fault. Depending on the make, this range can include airbags and seat belts, windows, locks and climate control, and also charging, brake, oil or coolant sensors.

2Common causes

Wiring or connector fault
Faulty sensor or switch
Water or corrosion in a connector
Control module fault
Low battery voltage

3Can I drive?

Caution · drive with care

The airbag may not deploy in a crash. Have it checked by a qualified technician; do not work on airbag wiring yourself.

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 3

Brand	Code	Description	System
BYD	B178D	SRS ECU fault Brand	Body
Subaru	B178D	No description available	Body
Toyota	B178D	No description available	Body

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 B178D and may be reported by some scan tools.

Brand	Code	Description	System
Mercedes-Benz	B178D01	Die Fondleuchte Mitte hat Funktionsstörung. Es liegt ein allgemeiner elektrischer Fehler vor. Brand	Body
Mercedes-Benz	B178D11	The center rear compartment lamp has a malfunction. There is a short circuit to ground. Brand	Body

6Related codes

Browse Bxxx codes or B178xx codes.