PowertrainP1842

Caution

Severity: Caution - get it checked when you can

Short circuit to negative

29 brands affected · Description from BMW 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 29

Brand	Code	Description	System
BAIC Motor	P1842	Clutch half engage point adaptation, half engage point below lower limit Brand	Powertrain
Mercedes-Benz	P1842	No description available	Powertrain
BMW	P1842	Short circuit to negative Brand	Powertrain
BYD	P1842	Torque reduction judgment 2 Brand	Powertrain
Chery	P1842	Precharge function failure Brand	Powertrain
Daewoo	P1842	1-2 Shift Solenoid Circuit Low Voltage Brand	Powertrain
DFFS	P1842	Transmission oil pressure switch 2/line failure Brand	Powertrain
DFFX	P1842	Torque reduction judgment 2 Brand	Powertrain
DFXK	P1842	No description available	Powertrain
EOBD	P1842	ATF-tryckvakt 2/krets Brand	Powertrain
Geely	P1842	Torque reduction judgment 2 Brand	Powertrain
GM	P1842	1-2 Shift Solenoid Circuit Low Voltage Brand	Powertrain
Great Wall	P1842	Torque reduction judgment 2 Brand	Powertrain
Hafei	P1842	Torque reduction judgment 2 Brand	Powertrain
Holden	P1842	Shift Solenoid Valve 4 Performance Brand	Powertrain
Honda	P1842	No description available	Powertrain
Isuzu	P1842	No description available	Powertrain
Land Rover	P1842	CAN level monitoring _ incompatible Brand	Powertrain
Mitsubishi	P1842	Torque reduction judgment 2 Brand	Powertrain
Opel	P1842	1-2 Shift Solenoid Circuit Low Voltage Brand	Powertrain
Peugeot	P1842	No description available	Powertrain
Porsche	P1842	No description available	Powertrain
Proton	P1842	Torque reduction judgment 2 Brand	Powertrain
Saab	P1842	1-2 Shift Solenoid Circuit Low Voltage Brand	Powertrain
MG (SAIC)	P1842	Gear Shift Solenoid 2 Current Diagnosis High Brand	Powertrain
Smart	P1842	No description available	Powertrain
Sprinter	P1842	No description available	Powertrain
Subaru	P1842	Transmission Fluid Pressure Sensor Switch C Circuit Brand	Powertrain
Suzuki	P1842	TCM Internal Module Keep Alive Memory Error 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 P1842 and may be reported by some scan tools.

Brand	Code	Description	System
SsangYong	P184200	Short to ground in shift motor output circuit Brand	Powertrain

6Related codes

Browse Pxxx codes or P184xx codes.