PowertrainP0845

Caution

Severity: Caution - get it checked when you can

Transmission Fluid Pressure Sensor/Switch B Circuit

31 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 31

Brand	Code	Description	System
Ashok Leyland CV	P0845	Outlet NOx Sensor - Stuck In Range Brand	Powertrain
BAIC Motor	P0845	Transmission Fluid Pressure Sensor/Switch B Circuit Brand	Powertrain
BMW	P0845	Transmission Fluid Pressure Sensor/Switch B Circuit SAE	Powertrain
BYD	P0845	Transmission Fluid Pressure Sensor/Switch B Circuit Brand	Powertrain
Chery	P0845	Transmission oil pressure sensor B circuit fault Brand	Powertrain
Chrysler	P0845	24 Hydraulic Pressure Test Brand	Powertrain
Daewoo	P0845	Transmission Fluid Pressure Sensor/Switch B Circuit Brand	Powertrain
DFFS	P0845	Transmission Fluid Pressure Sensor/Switch B Circuit Brand	Powertrain
DFFX	P0845	Transmission Fluid Pressure Sensor/Switch B Circuit Brand	Powertrain
DFXK	P0845	Transmission Fluid Pressure Sensor Switch 2 Brand	Powertrain
EOBD	P0845	Getriebeöldrucksensor/-schalter 'B' Stromkreis Brand	Powertrain
Fiat	P0845	24 Hydraulic pressure test Brand	Powertrain
Geely	P0845	Transmission Fluid Pressure Sensor Switch 2 Brand	Powertrain
GM	P0845	Transmission pressure switch solenoid D circuit Brand	Powertrain
Great Wall	P0845	Transmission Fluid Pressure Sensor/Switch B Circuit Brand	Powertrain
Hafei	P0845	Transmission Fluid Pressure Sensor/Switch B Circuit Brand	Powertrain
Holden	P0845	Transmission Fluid Pressure Switch 2 Signal Brand	Powertrain
Honda	P0845	Transmission Fluid Pressure Sensor/Switch B Circuit SAE	Powertrain
Hyundai	P0845	Transmission Fluid Pressure Sensor/Switch B Circuit SAE	Powertrain
Isuzu	P0845	Transmission Fluid Pressure Sensor/Switch B Circuit SAE	Powertrain
Land Rover	P0845	Transmission Fluid Pressure Sensor/Switch 'B' Circuit Brand	Powertrain
Mitsubishi	P0845	Primary pressure sensor circuit Brand	Powertrain
Nissan	P0845	Transmission Fluid Pressure Sensor/Switch B Circuit SAE	Powertrain
Opel	P0845	Transmission pressure switch solenoid D circuit Brand	Powertrain
Peugeot	P0845	Transmission Fluid Pressure Sensor/Switch B Circuit SAE	Powertrain
Proton	P0845	Primary pressure sensor circuit Brand	Powertrain
Saab	P0845	Stromkreis Magnetventil D Getriebedruckschalter Brand	Powertrain
MG (SAIC)	P0845	Even Clutch Pressure Sensor Circuit Brand	Powertrain
Suzuki	P0845	TR PRS SENS/B CIRC Brand	Powertrain
Tata	P0845	Transmission Fluid Pressure Sensor/Switch 'B' Circuit Brand	Powertrain
Toyota	P0845	Transmission Fluid Pressure Sensor/Switch B 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 4

These 7-character codes are manufacturer-specific variants of P0845 and may be reported by some scan tools.

Brand	Code	Description	System
Mercedes-Benz	P084500	Istdruck zu Solldruck Drucksensor unplausibel (Drucksensor 1) Brand	Powertrain
Mercedes-Benz	P084512	Der Öldrucksensor 'B' hat einen elektrischen Fehler. Es liegt ein Kurzschluss nach Plus vor. Brand	Powertrain
Mercedes-Benz	P084515	Der Öldrucksensor 'B' hat einen elektrischen Fehler. Es liegt ein Kurzschluss nach Plus oder eine Unterbrechung vor. Brand	Powertrain
Mercedes-Benz	P084564	Der Öldrucksensor 'B' hat einen elektrischen Fehler. Es liegt ein unplausibles Signal vor. Brand	Powertrain

6Related codes

Browse Pxxx codes or P084xx codes.