Yeah 7 hours about right. So are you implying that I may have a W-body pcm??? Or would it be the scanners they use at autozone? the actual # of the code for lean bank#1 and short term trim lean are the same. I'm thinkinng its their generic scanner at auto zone.I probably confused the number but it definately said lean fuel bank#1.

edit: no the light has not returned,and still no obvious symptoms

We could meet halfway in Holbrook, AZ and I can bring my scanner

Not implying that you have a w-body PCM at all. It was just that the "lean bank 1" info popped up on the net under several W-body forums for DTCs, when our tech info showed the other definition. I assume that the Autozone person entered "Bonneville" on the reader, and not Grand Prix (It has been known to happen).

Did you keep the little "print-out" from Autozone?

Anyway'*...I'll check my FSMs when I get home. I also sent a PM to a gearhead with a 2001 FSM to see if there is any better help there.

Again, I am confident we'll get you through this.

P.*. Also, sent YOU a PM

He didn't give me a print out, It was the day after Christmas and there was only two guys there, I didn't want to be a PITA. I watched him closely and it never asked Gp or Bonne, it just said linking scanning then displayed the code

As for meeeting up my sis is in Phoenix and is about to have a baby. My guess would be I could get a bit of time to meet up. She is due in the next month so I will definately be in your area soon.

P.M. sent

OK, after checking some info last night, I saw that many things can result in setting SES light for a lean condition. Basically, the PCM is operating too long out of normal range when setting the fuel trim.

First things to check are:

1. Wiring to the 02 sensors. Look for wires touching the exhaust, broken wires/connector, proper installation of the connector and 02 sensors.
2. Vacuum leaks...check all vacuum lines.
3. Poor grounding of the PCM...clean up the grounds
4. Water in the gas.
5. Improperly installed PCV valve.
6. Inaccurate MAF sensor reading...check that the MAF sensor is clean and no debris is on the MAF screen causing an innacurate airflow for the MAF reading

There is some more but these are the basics.

That'* awesome info I'll check it out in the morning. Since I had the LIM gasket replaced I think I should start with the vacum hoses going to the manifold/throttlebody,and maybee leave it at that unless that code retrns. So, I have noticed allot of people say to use different aerosol such as starting fluid to check for vacum leaks, I was wondering if I dont see any obvious loose hoses and the code returns, what is going to be safest to go spraying under the hood. Also Today I noticed I have no fourth gear could any of these possible problems contribute to that(vacum hose maybee?),from what I read in a post by camminated I am thinking that my 4th gear clutch shaft bit the dust.(This wouldn't suprise me this car has been in Colorado its whole life and alot people don't downshift an auto before climbing a hill.)Ill probably start another thread on that,but wondered if the two might be related.

ECHO
I cant tell you how much I appreciate the time you have spent helping me!

I would start with the vac hoses, too. Look for disconnected/cracked/worn through hoses and broken or loose vac hose fittings/elbows. After that, I wouldn't worry about it unless the SES light sets again.

Sorry to hear about your 4th gear issues, looks like some more research is needed

As far as helping....that'* what I am here for. And remember, I am only a phone call away

I'm still having issues with this same code.

So far I have :
1. new vaccum harnes
2. new o2 sensor(AC delco)
3.Cleaned MAF sensor( with quick drying electrical cleaner)
4. new pcv valve and gasket
5. cleaned ground that goes to the block. PCM ground?
6. checked plug going into the PCM.(loose but only turned the light off for one
day,checked several times since and still tight.)
I have a fuel filter to put on but I dont even know if this could be a low pessure problem.

If anyone has anymore ideas I'm very willing to listen.
thanks a bunch

Well, since you already have the fuel filter and that is a known maintenance item, it isn't going to hurt to replace that. Particularly since it is now appearing that you MAY have a fuel delivery issue. Do you know anyone with a fuel pressure guage?

Have you had the car re-scanned again, to make sure it is the same code?

I will dive back into my FSM'*...plus, see if we can get some more attention focused on your problem.

Oh, and maybe change the title of this thread a bit to bring in those that might be able to help. Something like "Lean Fuel Bank One - Help!" :?: