Nissan Maxima: check engine light / loose fuel filler cap

1st.
The Check Engine light is turned on by the Engine Computer to indicate a
failure of some significance in the automobile that must be addressed to
prevent damage or maintain specifications and performance. The Transmission
Computer can also send a signal to the Engine Computer to turn on this
light.

2nd
A mechanic with the proper external diagnostic tool can read the failure
code that may give an indication as to what has failed. The mechanic should
repair the problem and then reset the light.

3rd
A loose Fuel Filler Cap can be a cause that the Engine Computer will turn on
the Check Engine Light, because the fuel system on the car must be
pressurised and a loose cap means the system is not pressurised.

4th
The Fuel Filler Cap is what you unscrew to add Fuel to the car and then
should securely tighten, so that it clicks when you turn it.

5th
If the Fuel Filler Cap is really looses then you had better increase the
amount of force you use to secure it in place and ensure that you are
installing it correctly. Consult your owners manual.

6th
If the Fuel Filler Cap really is secure, then a failure is being logged by
the Engine Computer that must be properly interpreted, take the car to a
Nissan Dealer.

"Billy Cormic" <com> wrote in message
news:google.com... 

On Sun, 20 Jun 2004 03:03:17 GMT, Richard Tomkins <com> wrote: 

3 clicks should be sufficient.
 

It could be some other problem with the evaporative emission system, like
something cracked or loose hose. I kept getting similar check engine
light code one summer (that dealer thought may have been loose filler
cap), but each time it was cleared it did not return for a couple of
months. Only code I have gotten lately (95 SE) was an obviously
failed injector (1st one was under warranty, this was 3rd time 110k mi).

--
David Efflandt - All spam ignored http://www.de-srv.com/

Also make sure the engine is off when the car is being fueled.

"Richard Tomkins" <com> wrote in message
news:teranews.com... 
Transmission 
should 
on 

The computer monitors the evaporative system and a loose gas cap can set
a check engine light. If the cap is tight you might have a bad cap.
Loosen up the cap to see if pressure releases. If it does your cap is
fine and you should look at the evaporative cannister under the car or
perhaps a loose hose. I had the gas cap loose and the check engine
light came on too. So, be sure to make the cap click three times when
you tighten it after a fill up.

Billy Cormic wrote: