Toyota Trucks: 99 4Runner - Help reading engine trouble codes?

I bought a 99 4Runner over the weekend.

While driving home from work yesterday, my engine check light came on.
I noticed this the same time the low fuel light came on. I checked
everything I could visually, which looked fine, and filled it up with
gas, thinking maybe that had something to do with it.

I have read the Diagnostic Trouble Codes page on the off-road.com
site. I found the diagnostic box under my hood, and jumped the TE1
and E1 terminals, with the key in the ON position, but I don't get any
flashes of the engine check light. Is this procedure different for
later years maybe? The web page says 1987 and later, but I'm
wondering if the year ends after the page was made.

Any help is appreciated.

On Tue, 10 Feb 2004 18:48:57 GMT, Roger Brown <org>
wrote:
 

Yes, you are right. I looked into it more, and went and borrowed one
from the auto parts store. Neat little unit. Anyway...

There were two codes, both the same:

P0171 - Lean condition on bank 1

Any idea what could cause that? I reset the codes, and drove around a
while this afternoon running errands, and it never came back on.
Plugged fuel filter? Bad fuel pump? Clogged injectors? Bad
throttlebody?

The truck has ~75K on it, and I really don't know the history.