Re: Service light and maybe transmission mystery on a 2000LSOn Dec 20, 6:13 pm, "Oppie" <bop...@nospam,com > wrote:
> "byrdsfan" <byrds...@mailandnews,com > wrote in message
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> news:998b3eb2-6018-472e-8dc6-2946b8a37dc6@s12g2000prg.googlegroups,com ...
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> > On Dec 20, 10:56 am, "Oppie" <bop...@nospam,com > 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...@mailandnews,com > wrote in message
>
> >>news:7fc33aa7-27fc-4787-87ce-8a6bf910d4bf@p69g2000hsa.googlegroups,com ...
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> >> > 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.
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> >> > 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.
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> >> > Thanks!- Hide quoted text -
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> >> - Show quoted text -
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> > 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- Hide quoted text -
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> - Show quoted text -
I'm on Long Island.
There's a new Saturn place near me (imagine that). If this persists,
i'll go there. However i did pay a different Saturn place $90 last
summer to tell me there was nothing wrong with the engine fans only to
have my local guy fix it.