My 2000 Maxima with 80,000 miles just had the service engine soon light come
on. I have already replaced all 6 coils (1 1/2 years ago). Any thoughts?
Also, does anyone know a decent mechanic in southern New Hampshire? I am
hesitant to take it back to the dealer (who replaced the coils) due to cost,
but I also don't want to go to a garage where they don't know what they are
doing. Any advice would be appreciated.

Chris F wrote:
be most anything.

Maybe you're gas cap was not screwed down tightly.

As said before, no codes, nobody knows could be anything.



--
Posted via a free Usenet account from http://www.teranews.com

Mine came on too. My 2000 has 117,000 miles and had coils and MAF
replaced on warranty. I bet myself that it would indicate O2 Sensor.
I went to my local O'Reilly Auto store and used their code reader.
Sure enough, I got a PO140. That indicates heated oxygen sensor 2,
bank 1.

The OBDII code (read at AutoZone) reads:

P0171 - The PCM has determined that during testing, the fuel system for bank
1 was too lean.


But the guy at AutoZone could not tell me if the problem was an oxygen
sensor (much less which one) or anything else.

"JimV" <jv9999 (AT) yahoo (DOT) com> wrote

On Sun, 13 Aug 2006 16:39:11 -0400, JimV <jv9999 (AT) yahoo (DOT) com> wrote:

Hmmm..I get the same "service engine soon" light on my just-acquired
1999 Maxima GLE. I got it at Carmax, which furnished a long list of
checks they carried out (I hope!) finding everything OK.

So wondering how we can find out what, if anything that light means...

Chris, what do you mean about "codes"?

Thanks

Newbie

Chris F wrote:
PO171
With the Air/Fuel Mixture Ratio Self-Learning Control, the actual
mixture ratio can be brought closely to the theoretical mixture ratio
based on the mixture ratio feedback signal from the front heated
oxygen sensors. The ECM calculates the necessary compensation
to correct the offset between the actual and the theoretical ratios.
In case the amount of the compensation value is extremely large
(The actual mixture ratio is too lean.), the ECM judges the condition
as the fuel injection system malfunction and light up the MIL

Malfunction is detected when fuel injection system does not operate
properly, the amount of mixture ratio compensation is too large.
(The mixture ratio is too lean.)
Possible Cause

I Intake air leaks
I Front heated oxygen sensor
I Injectors
I Exhaust gas leaks
I Incorrect fuel pressure
I Lack of fuel
I Mass air flow sensor

On Mon, 14 Aug 2006 21:38:39 -0400, JimV <jv9999 (AT) yahoo (DOT) com> wrote:

This is interesting but highly technical information that goes over
the head of the average owner.

Any other "average owners" out there who have found solution to the
"service engine soon" light?

BTW. Mine is a 99 Maxima GLE.

Its technical because there are over 300 different error codes that
can cause the check engine light to come on,,,,,,,!!!

If you do not like the light, and do not want to fix the problem, then
take the bulb out of the light - thats your "non technical" fix.

Dont dump on someone who tried to give your the correct answer,,,,,

aspasia (AT) adelphia (DOT) net wrote:

Thanks for all of your replies - it turned out to be the mass airflow
sensor. As much as I dreaded to do it, I went to the dealer and after 1 hour
of diagnostics and test driving they got it right the first time. All I got
from other mechanics was "well we'll replace this and that..."


<AZV14 (AT) netscape (DOT) com> wrote