C CraZy2.0L Member Contributor Nov 30, 2008 #1 Which O2 is bank 1 on my PR5? Is it the one before the cat or after cat?
M Metallic36 Member : 2003 Mazda6 3.0L Speed Yellow Nov 30, 2008 #2 I think it's the 1st one.. the one before the cat.
8 808MP5 Member Contributor : GT3076R Pro5 Nov 30, 2008 #3 correct it's the first one closer to the block
C CraZy2.0L Member Contributor Nov 30, 2008 #4 Okay! I replace the O2 Sensor with an Universal Bosch O2 and I am still reading the O2 sensor Bank 1. What gives?
Okay! I replace the O2 Sensor with an Universal Bosch O2 and I am still reading the O2 sensor Bank 1. What gives?
L lil_red_wagon Member : lil white p5 Nov 30, 2008 #5 that's because it is the second one. it is backwards here. the primary (bank 1) is the second one and the secondary (bank 2) is in the pre-cat.
that's because it is the second one. it is backwards here. the primary (bank 1) is the second one and the secondary (bank 2) is in the pre-cat.
8 808MP5 Member Contributor : GT3076R Pro5 Nov 30, 2008 #6 Ah red is correct. I just pulled my codes and it say P0140 O2 sensor (bank 1 sensor 2) no signal
C CraZy2.0L Member Contributor Nov 30, 2008 #7 Well at least I can say I have all new O2 sensors now. But no more codes yet!
