PowertrainP2778

Caution

Severity: Caution - get it checked when you can

Upshift switch circuit intermittent/erratic

20 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 20

Brand	Code	Description	System
Ashok Leyland CV	P2778	No description available	Powertrain
BAIC Motor	P2778	Upshift Switch Circuit Intermittent/Erratic Brand	Powertrain
BYD	P2778	Upshift Switch Circuit Intermittent/Erratic Brand	Powertrain
Chery	P2778	Upshift Switch Circuit Intermittent/Erratic Brand	Powertrain
Daewoo	P2778	Upshift Switch Circuit Intermittent/Erratic Brand	Powertrain
DFFS	P2778	Upshift Switch Circuit Intermittent/Erratic Brand	Powertrain
DFFX	P2778	Upshift Switch Circuit Intermittent/Erratic Brand	Powertrain
DFXK	P2778	Upshift Switch Circuit Intermittent/Erratic Brand	Powertrain
EOBD	P2778	Litar suis naikgear antara masa/terganggu Brand	Powertrain
Geely	P2778	Upshift Switch Circuit Intermittent/Erratic Brand	Powertrain
GM	P2778	Upshift Switch Circuit Intermittent/Erratic Brand	Powertrain
Great Wall	P2778	Upshift Switch Circuit Intermittent/Erratic Brand	Powertrain
Hafei	P2778	Upshift Switch Circuit Intermittent/Erratic Brand	Powertrain
Hyundai	P2778	No description available	Powertrain
Land Rover	P2778	Upshift switch - circuit intermittent/erratic Brand	Powertrain
Peugeot	P2778	No description available	Powertrain
Saab	P2778	Upshift Switch Circuit Intermittent/Erratic Brand	Powertrain
MG (SAIC)	P2778	Upshift Switch Circuit Intermittent/Erratic Brand	Powertrain
Tata	P2778	Upshift Switch Circuit Intermittent/Erratic Brand	Powertrain
Toyota	P2778	Upshift switch circuit intermittent/erratic 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.

5Related codes

Browse Pxxx codes or P277xx codes.