My car is unhappy - trac/cel lights on - lose OD sometimes - very poor gas milage - rough idle - black smoke from tail pipe - error codes - P0171 bank 1 lean - P0325 - P1130 - P1135 - P1150 - P1155 and they repeated for a total of 11 errors - the local garages just want to trouble shoot with me banging my wallet on the hood - and my nearest Lex dealer is 1.5 hours away - i have an intermediate understanding of vehicles - i just hope i was missing something simple - could just one ?O2 sensor do all of that? or a fuel/air sensor? or do i have multiple failures - i just want to go to the dealer and not blasted - did a coil swap from front to rear - prob did not follow - plug change - no help - MAF would not affect just one bank - (or could it due to a dying sensor...) i know its hard to give a good answer without looking at it but i love this car (cosmetically mint) but when she hit 184k she got all upset - id hate to get rid of her due to the fact she needs a serious overaul - ty for your input