PowertrainP0940

Caution

Severity: Caution - get it checked when you can

Hydraulic Oil Temperature Sensor Circuit High

27 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 27

Brand	Code	Description	System
Ashok Leyland CV	P0940	Hydraulic Oil Temperature Sensor Circuit High SAE	Powertrain
BAIC Motor	P0940	Hydraulic Oil Temperature Sensor Circuit High Brand	Powertrain
BYD	P0940	Hydraulic Oil Temperature Sensor Circuit High Brand	Powertrain
Chery	P0940	Hydraulic Oil Temperature Sensor Circuit High Brand	Powertrain
Daewoo	P0940	Hydraulic Oil Temperature Sensor Circuit High Brand	Powertrain
DFFS	P0940	GPS antenna failure Brand	Powertrain
DFFX	P0940	Hydraulic Oil Temperature Sensor Circuit High Brand	Powertrain
DFXK	P0940	Hydraulic Oil Temperature Sensor Circuit High Brand	Powertrain
EOBD	P0940	Hydrauloljetemperaturgivare krets hög Brand	Powertrain
Geely	P0940	Hydraulic Oil Temperature Sensor Circuit High Brand	Powertrain
GM	P0940	Hydraulic Oil Temperature Sensor Circuit High Brand	Powertrain
Great Wall	P0940	Hydraulic Oil Temperature Sensor Circuit High Brand	Powertrain
Hafei	P0940	Hydraulic Oil Temperature Sensor Circuit High Brand	Powertrain
Holden	P0940	Hydraulic Oil Temperature Sensor Circuit High SAE	Powertrain
Honda	P0940	Hydraulic Oil Temperature Sensor Circuit High SAE	Powertrain
Hyundai	P0940	Hydraulic Oil Temperature Sensor Circuit High SAE	Powertrain
Isuzu	P0940	Hydraulic Oil Temperature Sensor Circuit High SAE	Powertrain
Land Rover	P0940	Hydraulic oil temperature sensor - circuit high Brand	Powertrain
Mitsubishi	P0940	Hydraulic oil TEMP.S.circuit HI Brand	Powertrain
Opel	P0940	Hydraulic Oil Temperature Sensor Circuit High Brand	Powertrain
Peugeot	P0940	Hydraulic Oil Temperature Sensor Circuit High SAE	Powertrain
Proton	P0940	Hydraulic oil TEMP.S.circuit HI Brand	Powertrain
Saab	P0940	Hydraulic Oil Temperature Sensor Circuit High Brand	Powertrain
MG (SAIC)	P0940	Hydraulic Oil Temperature Sensor Circuit High Brand	Powertrain
Tata	P0940	Hydraulic Oil Temperature Sensor Circuit High Brand	Powertrain
Toyota	P0940	GPS antenna failure Brand	Powertrain
Volkswagen	P0940	SAE: Hydraulic Oil Temperature Circuit: High 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 P0940 and may be reported by some scan tools.

Brand	Code	Description	System
SsangYong	P094000	Transmission oil temperature sensor signal above upper limit Brand	Powertrain

6Related codes

Browse Pxxx codes or P094xx codes.