PowertrainP0099

Caution

Severity: Caution - get it checked when you can

Intake Air Temperature Sensor 2 Circuit Intermittent/Erratic (Bank 1)

25 brands affected · Generic SAE J2012 description.

Key terms: Oxygen sensor: measures oxygen in the exhaust gas · Mass air flow sensor: measures the air going into the engine · Bank 1: the side of the engine containing cylinder 1 · SAE J2012: the standard generic code list · Powertrain: engine, transmission and emissions

1What it means in plain English

This code is in the fuel and air metering range, which includes fuel-pressure and camshaft-timing faults.

2Common causes

Dirty or faulty mass air flow sensor
Vacuum or intake air leak
Weak fuel pump or clogged fuel filter
Faulty fuel injector
Faulty oxygen sensor
Wiring or connector fault

3Can I drive?

Caution · drive with care

Have it diagnosed promptly. Some codes in this range affect fuel pressure or camshaft timing; if the engine loses power, runs badly, or stalls, stop safely and get professional help.

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 25

Brand	Code	Description	System
Ashok Leyland CV	P0099	Intake Air Temperature Sensor 2 Circuit Intermittent/Erratic (Bank 1) SAE	Powertrain
BAIC Motor	P0099	Intake manifold temperature sensor signal error Brand	Powertrain
BYD	P0099	Intake Air Temperature Sensor 2 Circuit Intermittent/Erratic Bank1 Brand	Powertrain
Chery	P0099	Intake Air Temperature Sensor 2 (G299) No Signal Brand	Powertrain
Daewoo	P0099	Intake Air Temperature Sensor 2 Circuit Intermittent/Erratic Brand	Powertrain
DFFS	P0099	Intake air temperature signal consistency failure Brand	Powertrain
DFFX	P0099	Intake manifold temperature sensor signal error Brand	Powertrain
DFXK	P0099	Intake manifold temperature sensor signal error Brand	Powertrain
EOBD	P0099	Imuilman lämpötilaanturi 2 piiri keskeytyvä/epävakaa rivi 1 Brand	Powertrain
Geely	P0099	Intake Air Temperature Sensor 2 (G299) No Signal Brand	Powertrain
GM	P0099	Intake Air Temperature Sensor 2 Circuit Intermittent/Erratic Bank1 Brand	Powertrain
Great Wall	P0099	Intake Air Temperature Sensor 2 Circuit Intermittent/Erratic Bank1 Brand	Powertrain
Hafei	P0099	Intake Air Temperature Sensor 2 Circuit Intermittent/Erratic Bank1 Brand	Powertrain
Holden	P0099	Intake Air Temperature (IAT) Sensor 2 Circuit Intermittent Brand	Powertrain
Honda	P0099	Intake Air Temperature Sensor 2 Circuit Intermittent/Erratic (Bank 1) SAE	Powertrain
Hyundai	P0099	Intake Air Temperature Sensor 2 Circuit Intermittent/Erratic (Bank 1) SAE	Powertrain
Isuzu	P0099	Intake Air Temperature Sensor 2 Circuit Intermittent/Erratic (Bank 1) SAE	Powertrain
Land Rover	P0099	Intake Air Temperature Sensor 2 Circuit Intermittent/Erratic (Bank 1) SAE	Powertrain
Opel	P0099	Intake Air Temperature Sensor 2 Circuit Intermittent/Erratic Bank1 Brand	Powertrain
Peugeot	P0099	Intake Air Temperature Sensor 2 Circuit Intermittent/Erratic (Bank 1) SAE	Powertrain
Proton	P0099	Intake Air Temperature Sensor 2 Circuit Intermittent/Erratic (Bank 1) SAE	Powertrain
Saab	P0099	Intake Air Temperature Sensor 2 Circuit Intermittent/Erratic Bank1 Brand	Powertrain
MG (SAIC)	P0099	Intake Air Temperature Sensor 2 Circuit Intermittent/Erratic Bank1 Brand	Powertrain
Tata	P0099	Intake Air Temperature Sensor 2 Circuit Intermittent/Erratic Brand	Powertrain
Toyota	P0099	Intake air temperature signal consistency 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.

5Extended variant codes 1

These 7-character codes are manufacturer-specific variants of P0099 and may be reported by some scan tools.

Brand	Code	Description	System
SsangYong	P009900	Booster temperature sensor noisy signal Brand	Powertrain

6Related codes

Browse Pxxx codes or P009xx codes.