PowertrainP124B

Serious

Severity: Serious - have it checked soon

Vacuum pump relay 2 control circuit open

9 brands affected · Description from BYD data.

Key terms: Control module: a small computer that runs one part of the car · Powertrain: engine, transmission and emissions

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

1What it means in plain English

The engine or powertrain control system has stored a fault that does not have specific guidance in this database yet.

2Common causes

Sensor or actuator fault
Wiring or connector fault
Vacuum or intake leak
Fuel or ignition problem
Control module fault

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 9

Brand	Code	Description	System
BYD	P124B	Vacuum pump relay 2 control circuit open Brand	Powertrain
Daewoo	P124B	No description available	Powertrain
EOBD	P124B	Motorromsvifte Brand	Powertrain
GM	P124B	No description available	Powertrain
Holden	P124B	Cylinder 4 Injector High Control Circuit Shorted to Control Circuit Brand	Powertrain
Isuzu	P124B	No description available	Powertrain
Opel	P124B	No description available	Powertrain
Peugeot	P124B	No description available	Powertrain
Saab	P124B	No description available	Powertrain

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.

5Related codes

Browse Pxxx codes or P124xx codes.