Question about 2002 Nissan Altima

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Check engine on ,

I have an nissan altima 2,5 year 2002, yesterday i had to change low beam light on the driver side, to change it i had to remove all air intake, when the job was done, reinstall air intake , when i turn on the engine service engine soon came on and i don't understand why,because i didn't touch any sensor or something else.
someone can help my with this problem. thank you

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  • mariusmv Nov 04, 2008

    my problem resolved by herself, after 2 days, and around 200 km driven, check engine went off and everything is back to normal. in my opinion, and i am not an expert in cars is just my idea of what happen,when y was changing light bulb, i did not disconnected the ground wire and and y had the key connected, and i thing the computer was gating information's from each sensor and when i disconnected MAF it received an error which mess up all system. looks like after 200 km reset himself and now everything is fine.

  • wwon_ca Nov 28, 2008

    I have the same problem SES light on. I change the air filter and the SES light goes off but it comes back in couple months. I wonder whether I should replace the air temperature sensor.

  • Jason Schoonmaker
    Jason Schoonmaker May 11, 2010

    Have you had the computer scanned for codes?

    There is a sensor for intake air temperature near where you were working that may have accidentally been unhooked. I've done this and not even known I touched it.

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



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Ahhhhhhh... you had the key on while you had to MAFS disconnected. Well, the computer saw that there was a bad signal from that sensor and it turned the light on. Once there are a certain number of "drive cycles" without the problem, the computer sees that the system is functioning properly and turns the light off. The code will still be stored in memory until it reaches 40 drive cycles without seeing a malfunction, at which time, that code will be erased from memory.

Just a note: don't leave the ignition turned on when you are disconnecting any sensors under the hood. That could lead to a real expensive issue that could have been avoided...

Posted on Nov 10, 2008

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The problem is only in the fuel

Posted on Nov 09, 2008


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