bank 1 to lean 2000 explorer - Ford Forums

pwjfr83 · 06-14-2007, 06:54

i have a 2000 explorer with a 4.0 sohc i got a code for a bank 1 to lean first choice for replacement is the O2 sensor after replacing that i ubruptly got a bank 2 to lean so i replaced the O2 sensor on that side. right after that it went back to a bank 1 to lean. ive replaced the map sensor already a couple months ago and i cannot find any leaks what are the other possible problems. problem started the day after a long trip.

Sigepno9 · 12-11-2007, 15:57

I'm having a similar problem. What did you end up doing?

timmyers1014 · 01-05-2008, 06:32

i had the same thing on my explorer, they said my catylitic converter was pluged. try taking that out and see what happens.

00gtr1 · 01-10-2008, 18:57

needs upper and lower intake O-rings to correct the lean condition.