Join Date: Sep 2011
Location: Fort Wayne Indiana
02 sensor problem
i had this problem with my old 02 sensors and got new ones and it's still doing the same thing, car starts to run lean on driver side.
ive got 3 codes for bank 2 sensor 1................ bank 1(passenger side) has no codes
lack of heated oxygen sensor indicates rich
slow response (i have a tune for my long tube headers so i should not have this code)
i have a wide band on the driver side and can see it going lean past 18 air to fuel ratio enough to blank out the gauge, so the computer is cutting fuel thinking it is curing the rich problem that doesn't exist
if i go wide open throttle the car acts fine in WOT with around 12 air to fuel ratio reading on the gauge, no miss fires at all on WOT
the car will go lean on the driver side at any random time and will go back to normal randomly
any chance i have a broken wire? or bad 02 extension harness? i noticed my dad folded the 02 harness in half and zip tied it out of the way when i was swapping transmissions, car was in a cold garage and im thinking this may have broke a wire.
Car has stock 2v PI engine with full exhaust and intake and BAMA Tune, im currently on a 87 tune and still had the problem on 93 for about a month or 2, before that the car ran fine for months with the tune and bolt ons
2003 Mustang Mach1 5 Speed, K&N intake, Xpipe, 3.73 gears, J&M Uppers and Lowers, Bama Tune
2008 Suzuki GsxR 750 K8, Gears, Power Commander, GP Guspension, M4 slip on
Last edited by 2002 SN95 GT; 02-17-2013 at 07:54 AM.