Question about 1998 Nissan Altima

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Where is the ait temperature sensor located?

Where is the air temperature sensor located? I received an p0110 code on my emissions test

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I believe they may be referring to the O2 Sensor, or Oxygen sensor. Being this is a 98, there may be two. If so, the first will be located on the exhaust manifold, the second, just before the catalytic converter. If there is only one equipped it will be located just before the catalyitic converter.

If you are not familiar with this part, it is the first "muffler" type part that is located just after the exhaust manifold and usually lies just under the passenger side of the car toward the front. You may need to raise the front of the vehicle to see it, as this is a small car and sits fairly low to the ground.

Typically, you will need a special socket called and O2 Socket to remove this and insert the new one, however if this is not affordable to you, then you can use an open end wrench. Be sure to disconnect the wiring harness first, then remove; and vise versa for inserting the new one.

Please let me know if you need further assistance with this matter.


Guru, Premium Expert @

Posted on May 08, 2010

  • Brandon Bruce
    Brandon Bruce May 14, 2010

    Please let me know how this turns out. I would like to know if the "air temperature sensor" is different than what I suspected they are referring to, as well as whether or not you fixed this issue.

    Thanks again,

    Guru, Premium Expert @



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Loss of power,have these codes p0403,p0100,p0110,p0181

Hi,these are the codes,
p0403....exurst gas recirculation circuit malfunction,
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p0110....intake air temperature circuit,
p0181....fuel temperature sensore a circuit performance,

It could be just one of these thats throwing the others out,so you will have to test them all seperatly,all the best,hope this was some help.

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Engine code p110

P0303 Code - Cylinder #3 Misfire
P0110 DTC - IAT Circuit Malfunction
P2195 O2 Sensor Signal Biased/Stuck Lean (Bank 1 Sensor 1) Code
Potential causes of a P2195 code include:
  • Oxygen (O2) or A/F ratio sensor or sensor heater malfunction
  • Open or short in O2 sensor circuit (wiring, harness)
  • Fuel pressure or fuel injector problem
  • Faulty PCM
  • Intake air or engine vacuum leaks
  • Faulty fuel injector(s)
  • Fuel pressure too high or too low
  • PCV system leak/fault
  • A/F sensor relay faulty
  • MAF sensor malfunction
  • ECT sensor malfunction
  • Fuel pressure too low
  • Fuel leak
  • Air suction in air intake system
  • A code P0303 may mean that one or more of the following has happened:
  • Faulty spark plug or wire
  • Faulty coil (pack)
  • Faulty oxygen sensor(s)
  • Faulty fuel injector
  • Burned exhaust valve
  • Faulty catalytic converter(s)
  • Running out of fuel
  • Poor compression
  • Defective computer
  • Potential causes of the P0110 DTC include:

  • po110
    • IAT sensor shifted out of airflow
    • Bad IAT sensor
    • Shorted to ground or open on signal circuit to IAT
    • Open in ground circuit to IAT
    • Poor connection at IAT (backed out terminals, broken connector locks, etc.)
    • Bad PCM

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NO POWER TO SPARK PLUG toyota noah 2003 showing error code p0105, p0110, p0115. some one help me plz.

code p0105 refers to manifold absolute pressure (MAP) sensor/ barometric pressure (BARO) sensor--circuit malfunction===causes --wiring---MAP sensor--BARO sensor--ECM
code p0110 refers to intake air temperature (IAT) sensor--circuit malfunction===causes---wiring ---IAT sensor--ECM
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Please GeoffW1 this are the fualt code diagnose from my toyota camry 1999 model v6 engine FAULT NUMBERS- 1.( p0110 ) 2.( p0135) 3.(p0450) 4.( p1410) 5.(P1411) please i need their locations and...

Sorry, I never noticed this post, for some reason I did not get an email from Fixya. If it is not too late..........
p0110 is the Intake Air Temp sensor or its wiring connector at fault. This is located at the side of the air cleaner housing.
p0135 is a fault in the No 1 oxygen sensor in bank 1, or its wiring connector. This thing is located in the exhaust manifold under the sheet metal shield at the front of the engine
p0450 is an evaporative emission system pressure sensor fault. Many people recommend replacing the fuel filler cap gasket before going further with this one

p1410 and p1411 indicate an EGR valve malfunction, and it may be enough to simply clean and check it, located on the engine next to the firewall. Also check the vacuum modulator and Vacuum Switch Valve, as shown here p46, 146, 152, 190

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The codes given are p0105 and p0110 and I cant seem to find where exactly these sensors are located on a 2002 mercury villager

There are a couple things I recommend that you take the time to understand here.

Diagnostic Test Code (DTC) P0105 is defined by SAE J2012 as "Manifold Absolute Pressure/Barometric Pressure Circuit"

(DTC) P0110 is defined as "Intake Air Temperature Sensor 1 Circuit"

The first thing is that Diagnostic Test Codes (DTCs) commonly referred to as "fault codes", NEVER tell you what parts to replace. These codes are designed to point the auto repair technician to the proper diagnostic testing routine in order to pinpoint the actual cause of the failure. If you do not have access to the diagnostic test routines published by the vehicle manufacturer for the purpose of diagnosing these faults, as well as the proper equipment required to perform the steps in the diagnostic routines, you may be in for an expensive "parts-replacing-no-joy-ride". However, spend your time and money as you wish.

The next thing is that the ENTIRE code definition needs to be taken into consideration. Please note that these are CIRCUIT codes. A sensor cannot function any better than the circuits that connect it to the rest of the engine control system. The circuits to these sensors must be properly tested in order to determine the exact CAUSE of the DTCs setting. - or as mentioned above, you can just replace all the parts associated with these fault codes and hope you get it right.

Another little piece of information you might find helpful is that both of these sensors share the same reference voltage from the engine computer. Fixing ONE of them has a pretty good chance of fixing BOTH of them. Then again, there might be two seperate problems.
However, you will have no way of knowing if it is one or both and if it is only one, then WHICH one actually needs to be fixed without proper diagnosis.

With all that said:
The MAP/BARO sensor is located at the left rear of the engine compartment, near the brake fluid reservoir.

The IAT sensor is located at the left front of the engine compartment, in the air intake duct near the battery

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