PowertrainP2779

Caution

Severity: Caution - get it checked when you can

Pulse switch S2

23 brands affected · Description from Toyota data.

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

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?

Caution · drive with care

Have it diagnosed promptly. If the car runs and drives normally, drive gently to a workshop. If it runs badly, stalls, overheats, loses oil pressure, or a warning light is flashing or red, stop safely and get professional help. If the code concerns the brakes, brake vacuum or brake assist, do not drive until it is checked: a hard pedal or longer stopping distance means stop.

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 23

Brand	Code	Description	System
Ashok Leyland CV	P2779	No description available	Powertrain
BAIC Motor	P2779	Downshift Switch Circuit Range/Performance Brand	Powertrain
BYD	P2779	Downshift Switch Circuit Range/Performance Brand	Powertrain
Chery	P2779	Downshift Switch Circuit Range/Performance Brand	Powertrain
Daewoo	P2779	Downshift Switch Circuit Range/Performance Brand	Powertrain
DFFS	P2779	Pulse switch S2 Brand	Powertrain
DFFX	P2779	Downshift Switch Circuit Range/Performance Brand	Powertrain
DFXK	P2779	Downshift Switch Circuit Range/Performance Brand	Powertrain
EOBD	P2779	Alennuskytkimen piirin alue/toiminta Brand	Powertrain
Geely	P2779	Downshift Switch Circuit Range/Performance Brand	Powertrain
GM	P2779	Downshift Switch Circuit Range/Performance Brand	Powertrain
Great Wall	P2779	Downshift Switch Circuit Range/Performance Brand	Powertrain
Hafei	P2779	Downshift Switch Circuit Range/Performance Brand	Powertrain
Holden	P2779	Downshift Switch Circuit Brand	Powertrain
Hyundai	P2779	No description available	Powertrain
Land Rover	P2779	Downshift circuit Brand	Powertrain
Opel	P2779	Downshift Switch Circuit Range/Performance Brand	Powertrain
Peugeot	P2779	No description available	Powertrain
Saab	P2779	Downshift Switch Circuit Range/Performance Brand	Powertrain
MG (SAIC)	P2779	Downshift Switch Circuit Range/Performance Brand	Powertrain
Tata	P2779	Downshift Switch Circuit Range/Performance Brand	Powertrain
Toyota	P2779	Pulse switch S2 Brand	Powertrain
Volkswagen	P2779	SAE: Downshift Switch Circuit: Range Performance Brand	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.

5Extended variant codes 1

These 7-character codes are manufacturer-specific variants of P2779 and may be reported by some scan tools.

Brand	Code	Description	System
Mercedes-Benz	P277900	Die Lenkradtaste 'Gangschaltung MINUS' hat Funktionsstörung Brand	Powertrain

6Related codes

Browse Pxxx codes or P277xx codes.