Were is the IAT in a 2004 nissan altima

Hi Chris.

p0304 = Number 4 Cylinder Misfire Detected

Faulty spark plug 4
Clogged or faulty fuel injector 4
Faulty ignition coil 4
Fuel injector 4 harness is open or shorted
Fuel injector 4 circuit poor electrical connection
Ignition coil 4 harness is open or shorted
Ignition coil 4 circuit poor electrical connection
Insufficient cylinder 4 compression
Incorrect fuel pressure
Intake air leak

The P0304 code means that the cylinder 4 is misfiring or is randomly misfiring. Start by checking for intake leaks an if no leaks are found the next step is to replace the spark plugs on cylinder 4.


p0102 = Mass or Volume Air Flow Circuit Low Input

Faulty mass air flow sensor
Intake air leaks
Dirty mass air flow sensor
Dirty mass air filter
Mass air flow sensor harness is open or shorted
Mass air flow sensor circuit poor electrical connection

Before replacing the mass air flow sensor, try replacing the air filter and cleaning the air flow sensor with low compress air or mass air flow sensor cleaner.
Reset code and drive vehicle.
If the code comes back, it may be necessary to replaced the mass air flow sensor.


p0154 = O2 Sensor Circuit No Activity Detected Sensor 1 Bank 2

Faulty Front Heated Oxygen Sensor Bank 2
Front Heated Oxygen Sensor Bank 2 harness is open or shorted
Front Heated Oxygen Sensor Bank 2 circuit poor electrical connection
Inappropriate fuel pressure
Faulty fuel injectors
Intake air leaks may be faulty
Exhaust gas leaks

Replacing the Front Heated Oxygen Sensor Bank 2 usually takes care of the problem.


p0113 = Intake Air Temperature Sensor Circuit High

Faulty Intake Air Temperature (IAT) sensor
Dirty air filter
Intake Air Temperature (IAT) sensor harness is open or shorted
Intake Air Temperature (IAT) sensor circuit poor electrical connection

The Intake Air Temperature (IAT) sensor is built into mass air flow sensor or in some vehicles mounted to the air filter duct housing. The sensor detects intake air temperature and transmits a signal to the Engine Control Module (ECM).The temperature sensing unit uses a thermistor which is sensitive to the change in temperature. Electrical resistance of the thermistor decreases in response to the temperature rise. The Intake Air Temperature signal is used as an input for various systems in the vehicle.



Hope this helps
FYT

http://www.autocodes.com/make/nissan

If you mean the Intake air temp sensor it is built into the air flow meter

IAT sensor is Intake Air Temperature sensor and goes in the air intake tubing. Don't know why it would tell you CAM sensor.

this car a 2005 altima does not use a iat( intake air temp sensor).what is wrong with the car?

These are a scam. and what's worse they can cause severe spark knock in hot summer climates, this in turn can damage the pistons and require very expensive repairs. Also they will void both the basic warranty on the powertrain and the US Federal emission warranty. As to what they really are, they are no more than a 20 cent resistor, there is no "chip", the computer reads the resistance of a piece of heated wire as it cools and heats it can determine how much air is going into the engine based on throttle position sensor input, IAT stands for "Intake Air Temperature". Take it back and get you money back.

The Mass Air Flow (MAF) sensor/Intake Air Temperature (IAT) sensor is located in the air cleaner case.
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The Intake Air Temperature (IAT) sensor is an integral part of the Mass Air Flow (MAF) sensor. Looks like this:

The IAT on the 1.8 engine is located in driver side follow before the air box and you will see a sensor thats the intale air temp sensor, hope that helps

If your looking for the Intake Air Temp/Manifold Absolute Pressure sensor (IAT/MAP)(2003 model year and up) It is on the top of the intake manifold, just to the left of the #3 injector fuel line. There are 2 small Torx screws holding it.

It is small and round (2 wire connector) and located either in the flexiable air intake hose to the engine or in the engine air filter housing.

Its on the air duct behind the filter housing.