OBDII code P0031

[slyangel9]

I'm getting Bank 1 Sensor 1 and know that this is the drivers side O2 sensor precat on the exhaust manifold. Is this considered the upstream or downstream?

Pep Boys is showing:

Part #13354 Bosch Oxygen Sensor (Downstream)
Part #13441 Bosch Oxygen Sensor (Upstream)

Which one is it?

Thanks.

 

[TRDCal]

I'm getting Bank 1 Sensor 1 and know that this is the drivers side O2 sensor precat on the exhaust manifold. Is this considered the upstream or downstream?

Pep Boys is showing:

Part #13354 Bosch Oxygen Sensor (Downstream)
Part #13441 Bosch Oxygen Sensor (Upstream)

Which one is it?

I would put my money on pre-cat is upstream and post cat is downstream...Not 100% sure tho

 

[cabowally]

FSM has the diagrams and testing procedure.


.

 

[slyangel9]

Thanks guys, I too believe it the upstream. Decided to get oem, and went to stealer today. Part # 89465-60150

 

[oljedi11950]

A/F sensor

Try Amazon next time , the denso's are cheaper & the store is n your neck o the woods !