I did a stupid thing. I was turning around on a road this afternoon,
went a little too far forward and drove over a limb that was on the
ground. It caught under the bumper as I was backing up. It looked
small and I was tired so I said screw it and drove forward over the
limb. It turned out to be a bit bigger than I had thought but no
damage was visible underneath the car. However, while driving over the
limb the car died. Now it won't start.

I've worked a bit on cars but I don't know anything about newer cars
with all of their sensors and electronics. I'm not sure how to go
about troubleshooting this. I don't know if it's a spark problem or a
fuel problem or what. The batter was very low on water but was still
glowing green. When I turn the key the starter spins like it normally
would but it's never taken more than a half second for the car to
start.

I bought this car new and just a couple weeks ago I hit 90,000 miles.
I have an extended warranty on it that I bought when I bought the car
but I don't know anything about it or what is covered. I was told it
was the standard warranty for Toyota vehicles. I had been at the
dealership for several hours and didn't really pay attention to the
nitty gritty details on the warranty. I'm assuming that whatever is
causing this is not covered.

I crawled under the car and there is something that looks kinda like a
spark plug screwed into the exhaust pipe with wires coming out. I'm
told this is an oxygen sensor. The wires coming out look like they may
be a bit frayed or whatever you want to call it, however they are not
broken and are still making contact. I'm also told by the clerk at
Kragen's that this part is $480 so swapping it to see if that's the
issue isn't really an option.

Like most people these days, I'm way short on cash. Add to that this
isn't even my car anymore. I sold it to my sister and just happened to
be driving it today when this happened. So I need to get it fixed
pronto, without spending much money. How do I go about troubleshooting
this? Has anyone had this happen before?

I googled my problem and there are a lot of results for non-starting
camry's but I didn't find anything useful, so now I'm turning to you
wonderful people. What tests do I need to do or how should I proceed?

It's a 2005 Camry LE with the 2.4L engine. Just over 90,000 miles.
Shows roughly an eighth of a tank of gas. I've never done any engine
work on it. Just the usual oil changes (every 5,000 miles with Mobile
1 5w30 oil). I've also changed the tires a couple times. One thing to
note is that I was in an accident last November and the whole a.s end
was messed up. Total damage was right about $14,000. Why the insurance
company fixed it is anyone's guess. There was no engine damage in that
wreck. I was rear ended by a pickup truck and that pushed me into the
vehicle in front of me but the engine was fine. The car went to the
shop, a month later we got it back, and it's started just fine ever
since.

I know on some cars you can do something with the key to get it to
flash a code that tells you what is wrong with the engine. Would this
happen to be one of the cars that has that?

Thanks in advance for any help!!!