Hi all,
I've got an intermittent P0430 pointing to bank2 on my 2010 Rx450h (245k miles). Did a bunch of digging, found pointers suggesting starting with the plugs (which haven't been changed in quite a while), looking for leaks, and then the O2 (and apparently air/fuel ratio) sensors. My plan was to start with the plugs (which need replacing anyway), and progress from there. As part of all of this, I was trying to get the details on the O2 & A/F sensors, but I haven't found anything which I'd call definitive. Does anyone have the details on those for this car, including the part numbers? A trip to the dealer provided:
89465-48230 - Sensor, Oxygen
89467-0E040 - Sensor, Air Fuel Ratio
89467-48160 - Sensor, Air Fuel Ratio

If I'm understanding this correctly, the two air/fuel ratio sensors are the upstream on the two banks, but this seems to imply there's only a single downstream? Any info to help clarify would be most appreciated.

 

Welcome to CL.
This question regarding a hybrid should also be posted in the hybrid sub forum.

You should also look at and search the Toyota Nation Forum for the Highlander Hybrid 2nd gen as its drivetrain is a mechanical twin of the RX 450h 3rd gen.
​​​​​​https://www.toyotanation.com/forums/...008-2013.1008/

With that high a mileage you could also have a failing catalytic converter.
You need more diagnostics before throwing random parts at it.

 

You can join the Toyota Technical Information System (TIS) for 2 days for $30 and obtain the technical information for this vehicle.
​​​​​​https://techinfo.toyota.com/techInfo...a.com%3A443%2F

 

Thanks for the tips. I'll definitely give TIS a look-see. And yep, agree that I need more diags. I'll see if I can get the active data from the affected sensors.