On Wed, 14 Jan 2004 04:30:00 GMT, firstname.lastname@example.org (sanpablo)
| I've had the check engine light come on in my
|wife's 99 Windstar. Codes comes up as lean condition
|Bank 1 and Bank 2 (0171 & 0174)
| Any ideas on what could be causing this? Engine
|runs perfect, no problems besides check engine light.
check for unmetered air leaking into your engine. Air that gets in
that is not measured by the MAF is not "known" to the PCM which will
not add enough fuel for the extra air. This causes the "lean"
Most likely cause of this "extra air" is a vacuum leak. Look/listen
for loose, disconnected or cracked vacuum lines. Also look for any
other hoses/connections that may have come off.