PowertrainP040A

Serious

Severity: Serious - have it checked soon

Oil gauge failure

23 brands affected · Description from Toyota data.

Key terms: Powertrain: engine, transmission and emissions

Safety: This code relates to engine oil pressure or oil level. Low oil pressure can destroy the engine within minutes.

1What it means in plain English

The oil-pressure gauge or its circuit has failed, so a real oil-pressure problem may not be shown on the dashboard.

2Common causes

Faulty oil pressure gauge
Faulty oil pressure sensor or sender
Damaged wiring or connector
Instrument cluster fault
Genuine low oil pressure that the gauge failed to show

3Can I drive?

Serious · drive with care

Do not rely on the oil gauge. Check the oil level and have the gauge and sensor diagnosed before driving further; if an oil-pressure warning light is on, stop the engine as soon as it is safe and do not drive.

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 23

Brand	Code	Description	System
Ashok Leyland CV	P040A	No description available	Powertrain
BAIC Motor	P040A	Exhaust Gas Recirculation Temperature Sensor A Circuit Brand	Powertrain
BYD	P040A	Exhaust Gas Recirculation Temperature Sensor A Circuit Brand	Powertrain
Chery	P040A	Exhaust Gas Recirculation Temperature Sensor A Circuit Brand	Powertrain
Daewoo	P040A	Exhaust Gas Recirculation Temperature Sensor A Circuit Brand	Powertrain
DFFS	P040A	Oil gauge failure Brand	Powertrain
DFFX	P040A	Exhaust Gas Recirculation Temperature Sensor A Circuit Brand	Powertrain
DFXK	P040A	Exhaust Gas Recirculation Temperature Sensor A Circuit Brand	Powertrain
EOBD	P040A	EGR-anturi 'A' piiri Brand	Powertrain
Geely	P040A	Exhaust Gas Recirculation Temperature Sensor A Circuit Brand	Powertrain
GM	P040A	Exhaust Gas Recirculation Temperature Sensor A Circuit Brand	Powertrain
Great Wall	P040A	Exhaust Gas Recirculation Temperature Sensor A Circuit Brand	Powertrain
Hafei	P040A	Exhaust Gas Recirculation Temperature Sensor A Circuit Brand	Powertrain
Holden	P040A	Exhaust Gas Temperature Sensor 4 Circuit Brand	Powertrain
Hyundai	P040A	No description available	Powertrain
Isuzu	P040A	No description available	Powertrain
Land Rover	P040A	EGR Temperature Sensor 'A' Circuit Brand	Powertrain
Opel	P040A	Exhaust Gas Recirculation Temperature Sensor A Circuit Brand	Powertrain
Peugeot	P040A	No description available	Powertrain
Saab	P040A	Exhaust Gas Recirculation Temperature Sensor A Circuit Brand	Powertrain
MG (SAIC)	P040A	Side airbag Right Leakage to plus on squib Brand	Powertrain
Tata	P040A	No description available	Powertrain
Toyota	P040A	Oil gauge failure 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.

5Related codes

Browse Pxxx codes or P040xx codes.