PowertrainP0540

Caution

Severity: Caution - get it checked when you can

Intake Air Heater A Circuit

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 covers vehicle speed, idle and oil-pressure control, charging-system voltage, and brake-switch circuits.

2Common causes

Carbon build-up in the throttle body
Faulty idle air control valve
Faulty vehicle speed sensor
Faulty charging system or weak battery
Wiring or connector fault

3Can I drive?

Caution · drive with care

Codes in this range include oil-pressure, brake-switch and charging-system voltage faults. If the oil-pressure warning light is on, stop the engine as soon as it is safe and do not drive until it is diagnosed. If the battery or charging warning light is on, drive straight to a workshop: the car can stall when the battery runs flat. For any other P05 code, have the car diagnosed promptly rather than continuing to 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 27

Brand	Code	Description	System
Ashok Leyland CV	P0540	Intake Air Heater A Circuit SAE	Powertrain
BAIC Motor	P0540	Intake Air Heater A Circuit Brand	Powertrain
BMW	P0540	Intake air Heater Circ Brand	Powertrain
BYD	P0540	Intake Air Heater A Circuit Brand	Powertrain
Chery	P0540	Intake Air Heater A Circuit Brand	Powertrain
Daewoo	P0540	Intake Air Heater A Circuit Brand	Powertrain
DFFS	P0540	Intake Air Heater A Circuit Brand	Powertrain
DFFX	P0540	Intake Air Heater A Circuit Brand	Powertrain
DFXK	P0540	Intake Air Heater A Circuit Brand	Powertrain
EOBD	P0540	Inntaksluftvarmer 'A' krets Brand	Powertrain
Ford	P0540	Intake Air Heater A Circuit SAE	Powertrain
Geely	P0540	Intake Air Heater A Circuit Brand	Powertrain
GM	P0540	Intake air heater feedback Brand	Powertrain
Great Wall	P0540	Intake Air Heater A Circuit Brand	Powertrain
Hafei	P0540	Intake Air Heater A Circuit Brand	Powertrain
Holden	P0540	Intake Air Heater Feedback Circuit Brand	Powertrain
Hyundai	P0540	Intake Air Heater A Circuit SAE	Powertrain
Isuzu	P0540	Intake Air Heater A Circuit SAE	Powertrain
Land Rover	P0540	Intake air heater A circuit Brand	Powertrain
Mazda	P0540	Intake Air Heater A Circuit SAE	Powertrain
Opel	P0540	Intake air heater feedback Brand	Powertrain
Peugeot	P0540	Intake Air Heater A Circuit SAE	Powertrain
Saab	P0540	Intake air heater feedback Brand	Powertrain
MG (SAIC)	P0540	Intake Air Heater A Circuit Brand	Powertrain
Tata	P0540	Intake Air Heater 'A' Circuit Brand	Powertrain
Toyota	P0540	Intake Air Heater A Circuit Brand	Powertrain
Volkswagen	P0540	SAE: Intake Air Heater A 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.

5Related codes

Browse Pxxx codes or P054xx codes.