Question about 2003 Nissan Sentra

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Ait sensor for 2003 nissan sentra 1.8

My car is hard to start when i let my car sit for a period length of time. i have a guy telling me its the ait sensor. what does the car do if that sensor goes out

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  • t3sam Jul 03, 2008

    everytime I start my car, I have to rev gas, otherwise it die right way.

    is fuel pump or sensor problem?

  • 8starkat Aug 12, 2008

    the 03 nissan sentra, starts hard, usually the second try, just replaced the alternator, and yet the emergency light and the break light keep turning on, "even while driving"

  • achuidian Sep 14, 2008

    My daughter dismantled the air intake manifold hose while "playing mechanic" but couldn't put things back, so I reconnected everything.
    Now the Nissan Sentra 2004 won't stay started while in park unless it is started many times, then all of a sudden it'll work great.
    I've checked the air sensor connection and seems ok.
    The car started excellent prior to this dismantling.
    Any suggestions?

  • x_tian72 Oct 16, 2008

    I have a Nissan Sentra'04 1.8S; the problem is the I get different fuel reading, even though I replace the fuel level sensor. Also It was replace the fuel pump assembly. I don't know what to do. Any help.

  • Anonymous Feb 14, 2009

    i have a 03 nissan sentra se-r spec-v, and i had to replace my MAF, and i went to get my inspection sticker and the guy gave me a code (P0113)(P0102) which is IAT sensor and MAF sensor. Also i have a cold air intake, so where is my IAT sensor?

  • gardner328 Mar 03, 2009

    My car starts hard only when the engine is cold. When the engine is warm, it starts great. I was told I need a new cold air intake sensor. Will that solve the problem?

  • Anonymous May 24, 2009

    my 03 sentra at times seemed like a bad cold start but would clear rather fast and be fine till the last time i went came home never started back please help

  • Anonymous Mar 25, 2014

    if i crank more than two times without it starting,it goes low voltage and i have to jumpstart



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If it cranks for a longer time than normal and than it starts, you my friend need a new fuel pump rebuild kit/pressure regulator inside the gas tank. what happens is that the fuel will go back into the gas tank instead of staying in the fuel line and everytime you turn the key, the pump has to pump fuel all the way to the injectors again to get the car started. So, long crank and than start means fuel pump rebuild kit/pressure regulator in tank.

Posted on Jul 24, 2008

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I have 2003 Nissan Sentra, 2.5, and I have replaced the fuel sending unit at least twice, maybe three times. Last time was in April of 2008, and in December of 2008, it started doing the same thing again. Not wanting to start, have to keep cranking it and it will finally start up. Seems to be worse when it's cold outside, and when it doesn't get started for more than a day.

The service tech at Nissan said he replaced his Fuel Pump, rather than the whole fuel sending unit, will this help? Any advice would be great.


Posted on Jan 14, 2009

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AIT ( Intake Air Temperature )sensor
it was locate in the intake manifold hose near the air filter
it is a electrical thermo resistor
but it can cause this problem my be the (ECT) Engine coolant Temperature sensor is the first cause of this case

ask for more information

Posted on Jul 10, 2008

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Posted on Jan 02, 2017

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My 2003 Nissan Sentra floods when I try to start when it is humid out. What can be done to fix it?

the mas air flow sensor u need to put it on scanner not to check codes but see whats going on with all the sensors your fav garage if your a good customer it maybe be free if not no more then 20 bucks if u scan it u will b chasing your tail good luck

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After the new sensors are installed and the code still comes back, replace the timing chain. They have been known to stretch and cause the P0335 code on these engines.

Nov 25, 2008 | 2003 Nissan Sentra

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My 2003 Nissan Sentra is getting terrible mileage

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3 Answers

2005 nissan sentra 1.8 liter wont start cold ...

These vehicles had issues with fuel pressure bleeding down when they sit for a period of time (like overnight). Nissan has issued a Technical Service Bulletin (TSB) on this issue.

There is a check valve in the fuel pump assembly that holds fuel in the fuel line so that fuel is readily available to the engine. This valve fails and allows that fuel to slowly drain back to the tank. The reason you have to crank the engine for a long period of time is that the fuel has to be pumped from the tank all the way to the engine- may take 10 seconds or more.

Once you start the vehicle, fuel is available and since the drain back to the tank is slow, restarting after even a few hours will be much easier.

The repair involves replacing the fuel pump "module" assembly (it's a service kit that contains the check valve mentioned earlier). The fuel pump assembly is removed from the tank and disassembled and reassembled with several new parts. This is a dealer-only repair. Depending on your level of expertise, you may be able to perform the repair yourself, but will have to buy the parts from the dealer.

Nissan Scope Technician- 10+ years experience in Nissan dealership.

Oct 30, 2008 | 2005 Nissan Sentra

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