PowertrainP1191

Caution

Severity: Caution - get it checked when you can

Key line voltage

31 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 31

Brand	Code	Description	System
Ashok Leyland CV	P1191	No description available	Powertrain
BAIC Motor	P1191	Times that rail pressure static value exceeded a certain value reached above limit Brand	Powertrain
Mercedes-Benz	P1191	ENV_ _Datum2 Brand	Powertrain
BMW	P1191	too great in lean range Brand	Powertrain
BYD	P1191	NO. 402 battery voltage sampling wire loop fault Brand	Powertrain
Chery	P1191	Linear oxygen sensors: Before CAT: Reversed Brand	Powertrain
Daewoo	P1191	Key Line Voltage Brand	Powertrain
Daihatsu	P1191	Out-gas low-pressure side pressure sensor range Brand	Powertrain
DFFS	P1191	No description available	Powertrain
DFXK	P1191	Linear O2 Sensors: Before CAT: Reversed Brand	Powertrain
EOBD	P1191	Tlak goriva Brand	Powertrain
Geely	P1191	Linear O2 Sensors: Before CAT: Reversed Brand	Powertrain
GM	P1191	Key Line Voltage Brand	Powertrain
Great Wall	P1191	Times that rail pressure static value exceeded a certain value reached above limit Brand	Powertrain
Holden	P1191	No description available	Powertrain
Hyundai	P1191	No description available	Powertrain
Isuzu	P1191	No description available	Powertrain
Land Rover	P1191	heated oxygen sensor Heater Circuit Open, H/W Fault Brand	Powertrain
Mahindra	P1191	No description available	Powertrain
Mitsubishi	P1191	FMCU IGBT11 TEMP.SNS circuit low Brand	Powertrain
Perodua	P1191	Out-gas low-pressure side pressure sensor range Brand	Powertrain
Peugeot	P1191	No description available	Powertrain
Porsche	P1191	No description available	Powertrain
Proton	P1191	FMCU IGBT11 TEMP.SNS circuit low Brand	Powertrain
Saab	P1191	Key Line Voltage Brand	Powertrain
MG (SAIC)	P1191	Downstream Oxygen Sensor Heater - Fault Brand	Powertrain
Sprinter	P1191	ENV_ _Datum2 Brand	Powertrain
Subaru	P1191	No description available	Powertrain
Suzuki	P1191	Fuel Press Regltr Crt Malf Brand	Powertrain
Tata	P1191	Rail Pressure Sensor Fault Brand	Powertrain
Toyota	P1191	Key line voltage 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 3

These 7-character codes are manufacturer-specific variants of P1191 and may be reported by some scan tools.

Brand	Code	Description	System
Great Wall	P119100	MCU(Drive motor control unit)has no other fault except P117800 and Brand	Powertrain
SsangYong	P119100	The pressure does not reach the demand after a calibrated time during starting (filling rail state) Brand	Powertrain
SsangYong	P119111	Charging door open/close switch, PIN AE2 circuit short to ground Brand	Powertrain

6Related codes

Browse Pxxx codes or P119xx codes.