PowertrainP040C

Caution

Severity: Caution - get it checked when you can

EGR Temperature Sensor A Circuit Low

32 brands affected · Generic SAE J2012 description.

Key terms: Catalytic converter: cleans the exhaust gases · EGR: exhaust gas recirculation, which cuts harmful gases · EVAP: the system that traps fuel vapour · Oxygen sensor: measures oxygen in the exhaust gas · SAE J2012: the standard generic code list · Powertrain: engine, transmission and emissions

1What it means in plain English

This range covers emissions control (EGR, EVAP, oxygen sensors and the catalytic converter), but some manufacturers also use P04 codes for oil-pressure, brake-fluid and coolant-level warnings.

2Common causes

Clogged or faulty EGR valve
EVAP system leak (hoses, canister, fuel cap)
Faulty oxygen sensor
Ageing catalytic converter
Low oil, brake fluid or coolant (on some models)
Wiring or connector fault

3Can I drive?

Caution · drive with care

Do not assume this code is safe to drive. Check the description: if it names oil pressure, brake fluid, coolant, or a brake fault, stop safely and have it diagnosed before driving. Emissions-only codes (EGR, EVAP, catalyst) should still be checked before an emissions or roadworthiness inspection.

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 32

Brand	Code	Description	System
Ashok Leyland CV	P040C	EGR Temperature Sensor A Circuit Low SAE	Powertrain
BAIC Motor	P040C	Exhaust Gas Recirculation Temperature Sensor A Circuit Low Brand	Powertrain
BYD	P040C	Exhaust Gas Recirculation Temperature Sensor A Circuit Low Brand	Powertrain
Chery	P040C	Exhaust Gas Recirculation Temperature Sensor A Circuit Low Brand	Powertrain
Daewoo	P040C	Exhaust Gas Recirculation Temperature Sensor A Circuit Low Brand	Powertrain
DFFS	P040C	Exhaust Gas Recirculation Temperature Sensor A Circuit Low Brand	Powertrain
DFFX	P040C	Exhaust Gas Recirculation Temperature Sensor A Circuit Low Brand	Powertrain
DFXK	P040C	Exhaust Gas Recirculation Temperature Sensor A Circuit Low Brand	Powertrain
EOBD	P040C	Litar sensor suhu EGR 'A' rendah Brand	Powertrain
Geely	P040C	Exhaust Gas Recirculation Temperature Sensor A Circuit Low Brand	Powertrain
GM	P040C	Exhaust Gas Recirculation Temperature Sensor A Circuit Low Brand	Powertrain
Great Wall	P040C	Exhaust Gas Recirculation Temperature Sensor A Circuit Low Brand	Powertrain
Hafei	P040C	Exhaust Gas Recirculation Temperature Sensor A Circuit Low Brand	Powertrain
Holden	P040C	Exhaust Gas Recirculation (EGR) Temperature Sensor 2 Circuit Low Voltage Brand	Powertrain
Hyundai	P040C	EGR Temperature Sensor A Circuit Low SAE	Powertrain
Isuzu	P040C	EGR Temperature Sensor A Circuit Low SAE	Powertrain
Land Rover	P040C	EGR Temperature Sensor 'A' Circuit Low Brand	Powertrain
Maserati	P040C	Exhaust Gas Recirculation (EGR) Temperature Sensor 1 Circuit Low Brand	Powertrain
Mitsubishi	P040C	EGR temperature sensor low Brand	Powertrain
Nissan	P040C	EGR Temperature Sensor A Circuit Low SAE	Powertrain
Opel	P040C	Exhaust Gas Recirculation Temperature Sensor A Circuit Low Brand	Powertrain
Peugeot	P040C	EGR Temperature Sensor A Circuit Low SAE	Powertrain
Porsche	P040C	EGR Temperature Sensor A Circuit Low SAE	Powertrain
Proton	P040C	EGR temperature sensor low Brand	Powertrain
Saab	P040C	Exhaust Gas Recirculation Temperature Sensor A Circuit Low Brand	Powertrain
MG (SAIC)	P040C	Leakage to plus on squib Brand	Powertrain
Subaru	P040C	EGR Temperature Sensor A Circuit Low SAE	Powertrain
Suzuki	P040C	EGR high pressure cooler downstream temperature sensor (circuit short to ground) Brand	Powertrain
SWM Motor	P040C	Exhaust gas recirculation (EGR) temperature sensor low voltage fault Brand	Powertrain
Tata	P040C	EGR Temperature Sensor A Circuit Low SAE	Powertrain
Toyota	P040C	Exhaust gas recirculation (EGR) temperature sensor A short circuit to ground Brand	Powertrain
Volkswagen	P040C	Exhaust gas recirculation temperature sensor A: signal too low; No or incorrect basic setting / adaptation 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.