PowertrainP0850

Caution

Severity: Caution - get it checked when you can

Park/Neutral Switch Input Circuit

42 brands affected · Generic SAE J2012 description.

Key terms: SAE J2012: the standard generic code list · Powertrain: engine, transmission and emissions

1What it means in plain English

This range normally covers the transmission control system, but some manufacturers use P07-P09 codes for unrelated functions (fuel pump control, air-mix motors, lighting or windows). Check the description before assuming it is a transmission fault.

2Common causes

Low or dirty transmission fluid
Faulty shift solenoid
Faulty speed sensor
Wiring or connector fault
Internal transmission wear

3Can I drive?

Caution · drive with care

If the transmission slips, jerks, will not shift, or a transmission temperature warning is on, stop driving and let it cool: continuing can cause expensive damage. If the code names a different system (for example the fuel pump), treat it on its own terms; a fuel-pump control failure can stall the car, so have it checked before driving further. Otherwise drive gently to a workshop.

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 42

Brand	Code	Description	System
Ashok Leyland CV	P0850	Park/Neutral Switch Input Circuit SAE	Powertrain
BAIC Motor	P0850	Park/Neutral Switch Input Circuit Brand	Powertrain
Mercedes-Benz	P0850	Park/Neutral Switch Input Circuit SAE	Powertrain
BYD	P0850	Park/Neutral Switch Input Circuit Brand	Powertrain
Chery	P0850	P/N switch Brand	Powertrain
Chrysler	P0850	RBM fault Brand	Powertrain
Daewoo	P0850	Park/Neutral Switch Input Circuit Brand	Powertrain
Daihatsu	P0850	PN range signal system Brand	Powertrain
DFFS	P0850	Park/Neutral Switch Input Circuit Brand	Powertrain
DFFX	P0850	N gear switch stuck Brand	Powertrain
DFXK	P0850	Park/Neutral Switch Input Circuit Brand	Powertrain
EOBD	P0850	Litar input suis Park/neutrall Brand	Powertrain
Fiat	P0850	Park/Neutral switch performance Brand	Powertrain
Ford	P0850	Neutral switch failure Brand	Powertrain
Geely	P0850	Park/Neutral Switch Input Circuit Brand	Powertrain
GM	P0850	Circuit du contacteur PNP Brand	Powertrain
Great Wall	P0850	Park/Neutral Switch Input Circuit Brand	Powertrain
Hafei	P0850	Park/Neutral Switch Input Circuit Brand	Powertrain
Holden	P0850	Neutral Position Sensor Performance Brand	Powertrain
Honda	P0850	Park/Neutral Switch Input Circuit SAE	Powertrain
Hyundai	P0850	Park/Neutral Switch Input Circuit SAE	Powertrain
Isuzu	P0850	Park/Neutral Switch Input Circuit SAE	Powertrain
Land Rover	P0850	Park lock sensor fault Brand	Powertrain
Mahindra	P0850	Park/Neutral Switch Input Circuit SAE	Powertrain
Maserati	P0850	Park/Neutral Switch Performance Brand	Powertrain
Mazda	P0850	Neutral switch failure Brand	Powertrain
Mitsubishi	P0850	Park/Neutral Switch Input Circuit SAE	Powertrain
Nissan	P0850	Park/Neutral Switch Input Circuit SAE	Powertrain
Opel	P0850	Circuit du contacteur PNP Brand	Powertrain
Perodua	P0850	PN range signal system Brand	Powertrain
Peugeot	P0850	Park/Neutral Switch Input Circuit SAE	Powertrain
Porsche	P0850	Park/Neutral Switch Input Circuit SAE	Powertrain
Proton	P0850	Park/Neutral Switch Input Circuit SAE	Powertrain
Saab	P0850	Circuit du contacteur PNP Brand	Powertrain
MG (SAIC)	P0850	Park/Neutral Switch Input Circuit Brand	Powertrain
Sprinter	P0850	Park/Neutral Switch Input Circuit SAE	Powertrain
Subaru	P0850	Neutral Position Switch Circuit Brand	Powertrain
Suzuki	P0850	P-N POS SW/CIRCUIT Brand	Powertrain
SWM Motor	P0850	Neutral switch circuit input fault Brand	Powertrain
Tata	P0850	Park/Neutral Switch Input Circuit Brand	Powertrain
Toyota	P0850	Transmission Neutral gear sensor failure Brand	Powertrain
Volkswagen	P0850	Park/neutral switch input circuit: open or short to plus; Implausible signal 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 4

These 7-character codes are manufacturer-specific variants of P0850 and may be reported by some scan tools.

Brand	Code	Description	System
SsangYong	P085000	Park/Neutral Switch Input Circuit error Brand	Powertrain
Mercedes-Benz	P085011	The button 'Gear range P' has a malfunction. There is a short circuit to ground. Brand	Powertrain
Mercedes-Benz	P085015	The button 'Gear range P' has a malfunction. There is a short circuit to positive or an open circuit. Brand	Powertrain
Mercedes-Benz	P085029	The button 'Gear range P' has a malfunction. There is an invalid signal. Brand	Powertrain

6Related codes

Browse Pxxx codes or P085xx codes.