2004 Lexus LX470 270k P0430 code

[whereditgo]

Getting a P0430 Bank 2 Sensor 2 CAT efficiency code.

Ready to install new after CAT O2 sensors, RA Denso on hand.

Running a few tanks of Super and possibly some CAT cleaner/lacquer thinner to clean out the CATs and hopefully not cause other issues.

Prior to those measures thought I would post some engine data for crowd diagnostics. Can run different test data if needed. Cold/hot/load variations.

Hoping to avoid the CAT replacement $$$.

Thanks in Advance?

 

[whereditgo]

Torque Lite Screen Capture here;

 

[OEMGUY0720]

You have a better chance of getting your P0430 fixed by replacing your your upstream and downstream O2 sensors than us with VVTi. Also, check your spark plugs and coil plugs as well as your MAF sensor make sure they are good.

 

[menancyandsam]

see this thread...https://forum.ih8mud.com/threads/p0430-2003-landcruiser-solved.1337102/

Cleaning the cat worked for me & a few others.

 

[whereditgo]

Appreciate the spark plug/coil advice. Those were replaced when I did timing belt 70k miles ago with NGK Iridium's. Thought plugs would be ok, but upon inspection all electrodes on bank 2 (2,4,6,8) were dusted and bank 1 (1,3,5,7) were worn. Replaced with IK20TT's. Power and response significantly improved. Will see if any codes come back...

 

[whereditgo]

Cleaned MAF as well.

 

[miroza]

Check the exhaust pipe for leaks, including the lambda probe seals. Any holes in the pipes or fittings.