Hello all,

Can anyone point me to a previous thread or simply answer the following. Based on what I've read so far and the fact that I just picked up my first CHECK ENGINE light at 129,987 miles with a P0171 (too lean bank 1 code).

After searching all of the threads, I thought that 2 things were needed.

1. Clean the EGR valve. HOW do I do that? The Haynes manual only talks about replacing it.

2. Replacing the oxygen sensors. Do I need a "special socket" for these once I get the wires off? Any special tricks here? Are they accessable easily from below?

Any other thought on these or tracking down my P0171 would be greatly appreciated.

Thanks,
Bob

97 Expy
129,987 miles today
Firestone Destination LE tires
Doing the big tune up a little at a time.....