Extruder wrote:
> My check engine light is on and the codes read bank 1 and 2 lean fuel. Any
> ideas on what's causing these faults.

Mostly upper intake plenum gaskets leaking on the 3.8 V6. There are
updated bolt seals and gaskets available. You can also replace the
intake to head gaskets as they can leak vacuum, but to a lesser extent;
the job is more difficult as well. The seals shrink quite a bit when
cold and cause excessive vacuum leaks on cold startups, resulting in a
rough idle or sometimes just the P0171 / P0174 codes.

Toyota MDT in MO