Re: Service light and maybe transmission mystery on a 2000LS


"byrdsfan" <byrdsfan@xxxxxxxxxxxxxxx> wrote in message
news:998b3eb2-6018-472e-8dc6-2946b8a37dc6@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
On Dec 20, 10:56 am, "Oppie" <bop...@xxxxxxxxxx> wrote:
For what its worth, on my '01 lw300 6cyl, when the MAF sensor started to
go,
the SES light came on and shortly after the shifting got very harsh.
Resetting the code caused all to run nicely for about 5 miles and then
the
light came on again and the shifting got rough. Replaced the MAF sensor,
reset the code and all good.
Don't know if they purposely make it seem like your car is about to blow
up
when in limp-home mode just to get you to repair it quicker. All sorts of
forced modes of operation are possible with computer driven systems. Some
are good and others just plain devious.
btw- code reset on my car is simply done by pulling the Controls B+ fuse
in
the UHFB for 20 seconds. Codes are stored in RAM and power loss erases
them.
Oppie (White Plains, NY)

"byrdsfan" <byrds...@xxxxxxxxxxxxxxx> wrote in message

news:7fc33aa7-27fc-4787-87ce-8a6bf910d4bf@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx



Hate to follow another tranny question, wouldnt want to give anyway
wrong ideas about Saturns.
I have well over 250,000 miles on my 2000LS, automatic, six cylinder.

I recently got new tires at my local garage and mentioned the service
light was coming on. He did a check and said it was the coolant
sensor. I said order the part and I'll come back. So i did and the
light came back that night.

I have a long commute into Mahattan (hence the mileage) and that's
enough to wreck any car. When the light returned, i noticed what I
would call a bucking (or a thud) in the transmission. This came after
a long drive at like 65-70. I hit the sidestreets and after a while
the light comes on and a thhe bucking starts. The tranny had been
somewhat rough at times recently but now a light went off in my head.
These two are related.

I drop off the car at night with this guy so i left a note explaining
that i thought it might be related. The next day he didn't mention the
note, just said the car was ready and that the codes had been cleared
out. I didn't mention the note either. This is the only service
station within walking distance of my house and that is a big help.

That night, tonight, same thing. After a long a drive, when I hit the
side streets, it starts to thump and the light comes on. The thump is
not horrendous but i fear it will get worse. Meanwhile I feel I paid
like $150 for nothing.

So ... what make the tranny make a loud thud going from first to
second (less noise after that), but only after having driven for a
while, and with it the service light goes on? The problem is i cant
duplicate this during the day time and mechanics don't want to take
your word for anything. If I had a detailed theory, it might help.
Also, perhaps a guess on what it would cost to fix. I cant put too
much more money into this car but that's what i say every time i put
too much money in it.

Thanks!- Hide quoted text -

- Show quoted text -

Is that MAss AIr Flow? It relates to the transmission?
do you pull the fuse while car is running or not?
I just wish whatever is happening would happen full time so i can
bring it in and point to it.
Thanks!

Yes, MAF= Mass Air Flow. The bad MAF (diagnosed by seeing lean bank 1 and 2
in the codes) caused the Check Engine light to come on. I would guess that
the ECU then enters a limp-home or limited open loop mode. In any case, it
caused the transmission to shift very roughly.
Fuse was pulled with key off. It will reset the ECU and should make things
run nice for a while till a code gets thrown again. Not sure if this resets
the drive cycle so don't rely on this if you are ever trying to get a
vehicle past emissions testing.

This is where connecting a scan tool (not just a simple code reader) to see
what codes or data are presenting is needed. There is (very luckily) a very
good independant garage next door to where I work. The owner looks more like
a computer geek than a grease monkey and he really knows his stuff. When he
gets stumped, has a subscription service to call a guru. I always go to an
independant service first whenever possible (if I can't fix it myself).
If you're anywhere near Hawthorne, NY look up Auto Action on Brady Avenue.
Tis not the season to be riding a bicycle


.

Relevant Pages

  • Re: Service light and maybe transmission mystery on a 2000LS
    ... the SES light came on and shortly after the shifting got very harsh. ... reset the code and all good. ... Don't know if they purposely make it seem like your car is about to blow ... I have well over 250,000 miles on my 2000LS, automatic, six cylinder. ...
    (rec.autos.makers.saturn)
  • Re: Service light and maybe transmission mystery on a 2000LS
    ... the SES light came on and shortly after the shifting got very harsh. ... reset the code and all good. ... Don't know if they purposely make it seem like your car is about to blow ... I have well over 250,000 miles on my 2000LS, automatic, six cylinder. ...
    (rec.autos.makers.saturn)
  • Re: Service light and maybe transmission mystery on a 2000LS
    ... the SES light came on and shortly after the shifting got very harsh. ... Don't know if they purposely make it seem like your car is about to blow up ... I have well over 250,000 miles on my 2000LS, automatic, six cylinder. ... The tranny had been ...
    (rec.autos.makers.saturn)
  • Re: Service light and maybe transmission mystery on a 2000LS
    ... the SES light came on and shortly after the shifting got very harsh. ... Don't know if they purposely make it seem like your car is about to blow up ... I have well over 250,000 miles on my 2000LS, automatic, six cylinder. ... it starts to thump and the light comes on. ...
    (rec.autos.makers.saturn)
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