PowertrainP1240

Caution

Severity: Caution - get it checked when you can

Cylinder 4 fuel injection circuit open

28 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 28

Brand	Code	Description	System
Ashok Leyland CV	P1240	No description available	Powertrain
Mercedes-Benz	P1240	No description available	Powertrain
BYD	P1240	ASC retard request plausibility Brand	Powertrain
Chery	P1240	ASC retard request plausibility Brand	Powertrain
Daewoo	P1240	Sensor Power Supply Brand	Powertrain
DFFS	P1240	No description available	Powertrain
DFFX	P1240	ASC retard request plausibility Brand	Powertrain
DFXK	P1240	Fuel Injector for Cylinder 4 (N33): Open Circuit Brand	Powertrain
EOBD	P1240	LPG-suutin 1 Brand	Powertrain
Geely	P1240	ASC retard request plausibility Brand	Powertrain
GM	P1240	Sensor Power Supply Brand	Powertrain
Great Wall	P1240	ASC retard request plausibility Brand	Powertrain
Hafei	P1240	ASC retard request plausibility Brand	Powertrain
Hyundai	P1240	No description available	Powertrain
Land Rover	P1240	No description available	Powertrain
Mahindra	P1240	No description available	Powertrain
Mitsubishi	P1240	Ignition angle plausibility Brand	Powertrain
Peugeot	P1240	No description available	Powertrain
Porsche	P1240	No description available	Powertrain
Proton	P1240	Ignition angle plausibility Brand	Powertrain
Saab	P1240	Sensor Power Supply Brand	Powertrain
MG (SAIC)	P1240	Turbocharger Boost Sensor Too High in Idle Brand	Powertrain
Sprinter	P1240	No description available	Powertrain
Subaru	P1240	Exhaust Control Valve Solenoid Circuit High Brand	Powertrain
Suzuki	P1240	LPG Injector 1 Brand	Powertrain
SWM Motor	P1240	Linear oxygen sensor heating circuit high Brand	Powertrain
Toyota	P1240	Cylinder 4 fuel injection circuit open Brand	Powertrain
Volkswagen	P1240	Fuel Injector for Cylinder 4 (N33): Open Circuit 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 12

These 7-character codes are manufacturer-specific variants of P1240 and may be reported by some scan tools.

Brand	Code	Description	System
Mercedes-Benz	P124000	Der CAN-Bus hat Funktionsstörung. Brand	Powertrain
Mercedes-Benz	P124002	The CAN bus has a malfunction. There is a general signal fault. Brand	Powertrain
Peugeot	P124026	No description available	Powertrain
Peugeot	P124042	No description available	Powertrain
Peugeot	P124044	No description available	Powertrain
Peugeot	P124046	No description available	Powertrain
Peugeot	P124047	No description available	Powertrain
Peugeot	P124049	No description available	Powertrain
Peugeot	P124050	No description available	Powertrain
Peugeot	P124051	No description available	Powertrain
Peugeot	P124061	No description available	Powertrain
Mercedes-Benz	P124088	Der CAN-Bus hat Funktionsstörung. BusOff Brand	Powertrain

6Related codes

Browse Pxxx codes or P124xx codes.