I have a 2001 Acura CL with a Code P0131 an 02 circuit low voltage Bank 1 sensor 1. I have been trying to research how to repair. I'm not sure if it is under the car just before the catalytic converter. The videos talk about locating cylinder 1 and it is always upstream of the catalytic converter.

Any help is really appreciated, Thanks !

 

yes, It's located just before the catalytic converter.




but before you buy a new O2 sensor: it seems like more than one item can trigger this DTC...I pasted the service manual guidance below.