Car started losing power and died. Now, why does it start but dies instantly?

Check your engine grounding wire. That or you do not have the alternator connections on securely

Does the car loose power before stalling or does it simply die without warning? If it loses power first, you're likely looking at a fuel pump or fuel system problem. If it just dies, you probably have an ignition problem. Does the check engine light come on before it dies?

It could be the filter, but it could also be the fuel pump.

run fault codes and check for cam/crank sensor fault. Check that the cam shaft is turning (broken belt)

when was it tested at oreillys? was it before it died and failed to restart? if so you could have more than one problem the scanned problem is definitely an O2 sensor but the failing to restart could be from many other reasons. replace the o2 sensor see if it refires. if it does not there are 3 basic things to follow when a vehicle fails to start. does it get a spark, does it get air and does it get fuel. figure out what it is not getting and investigate why and you will find your answer.

Vehicle Starts, Runs and Loses Power

http://whoisbyme.blogspot.in/2012/07/vehicle-startsruns-and-loses-power.html

--------------

Its a hot start issue.

Can be related to low fuel pressure or problem with crank sensor.

Also it can be weak battery or starter.

But possibilities are to be inspected to confirm what exactly it is.------

To troubleshoot and confirm the issue,i suggest you refer few solved help links with similar types of problem like yours:------

Click the link below:------

1991 Toyota Trecel: Engine Starts fine but dies when gets Warm?

http://whatisbyme.blogspot.in/2012/05/1991-toyota-trecel-engine-starts-fine.html

-------------

1994 Toyota Pickup: Starts fine but dies in few seconds?

http://howtobyme.blogspot.in/2012/05/1994-toyota-pickup-starts-fine-but-dies.html

------------

1995 Lexus LS400: Running Hot?

http://whatisbyme.blogspot.in/2012/05/1995-lexus-ls400-running-hot.html

------------

2002 Toyota Camry: Puff of Blue or White Smoke while Starting?

http://whatisbyme.blogspot.in/2012/05/2002-toyota-camry-puff-of-blue-or-white.html

------------

Multiple problems on car: Car runs hot, A/C blows hot and car starts surging?

http://schematicsdiagram.blogspot.in/2012/04/multiple-problems-on-car-car-runs-hotac.html

--------------

Delay starting on Toyota Prius?

http://schematicsdiagram.blogspot.in/2012/02/delay-starting-on-toyota-prius.html

-----------

Honda car will not start intermittently?

http://technoanswers.blogspot.in/2012/02/honda-car-will-not-start-intermittently.html

--------------

Vehicle Starts, Runs and Loses Power

http://whoisbyme.blogspot.in/2012/07/vehicle-startsruns-and-loses-power.html

--------------

Intermittent starting issues on Volvo 760?

http://schematicsdiagram.blogspot.in/2012/02/intermittent-starting-issues-on-volvo.html

-----------

Car starts and cuts off immediately?

http://repairhelpcenter.blogspot.com/2012/01/car-starts-and-cuts-off-immediately.html

-----------

===========

These details will help.

Thanks.

If at the begining the car would run at a longer time span than now replace the coil. Coils tend to die out slowly

It's possible that the starter is bad but don't think it would cause the car to die or just stop running. You say in a parking lot, did you shut it off and then tried starting it? and no start? if so check the starter !!!

coolant sensor

you can try to see if the fuel regulator is bad,sometimes there will be gas in the air cleaner\tube,it sounds to me that its getting too much fuel