The "check engine" light is on in a 2003 Maxima GLE. What could it be?

Answer 1

a lot of things autozone will tell you for free why it is on

Answer 2

(Check Engine Light)
There are many components that work together in the engine to maintain optimal engine performance and economy.
A service engine soon, or check engine light indicates that there is a sensor that is reading a condition that is "out of range".
Simply resetting the light does not solve the initial cause of the problem.
Replacing a number of parts trying to troubleshoot the problem in the hopes of getting the light to stay off is a tremendous waste of time and money.
The simplest, and most economical way to alleviate your issue, is to have an engine diagnostic done by a reputable shop to determine what caused the computer to signal you to begin with. Just reading the computer codes may not find the "cause".
That being said, if per-chance you feel the need to reset the light in the hopes that it was a "glitch" of some kind, you could disconnect the negative battery terminal for a couple of minutes to clear the check engine light.

Answer 3

when the check engine light is on this could mean many many things. first of all though, i find that when many people come into my shop with check engine lights on the problem is in the vacuum system so all you have to do in that instange is just tighten the gas cap. try it, who knows it might be the solution

Answer 4

Could be a loose gas cap---did the light come on after you put gas in the car? Take to a dealer, Autozone or tune-up shop and have them check the trouble code.

Answer 5

Quit being cheap, take it to a good Nissan dealer and have them check it with the CONSULT-II unit. There are MANY things that will turn your CEL on. Have a professional check it with the proper tools.

Answer 6

Its time for routine service maintenance