P0135

[simonsayz1]

P0135 showed it's ugly head today. Been reading and super confused, which side is bank 1?

thx,
Pete

[89Vette]

Gonna go out on a limb and say bank 1 is the driver's side. This is the defacto bank 1 side for most (all?) engines. Next, I'll suggest you have a bad O2 sensor on that side. Of course, if I provided incorrect advice on which side is bank 1, you could always swap the old (removed) O2 sensor into the passenger side.

There should be an O2 sensor near (or in?) each Catalytic converter. Start by replacing the driver's' side O2 sensor.

https://www.youtube.com/watch?v=WbpQMX5orqY

[simonsayz1]

Thx 89Vette for the response. Scan does say o2 sensor, bank 1 sensor 1. I've read it's driverside but also read that it's passenger side on Isuzu ( which I've also read is a PITA to replace). That's where I get confused. I erased the code and it hasn't come back yet.