donnie boy

2000 es 300 66,000 mi. Checked air filter. Next day cel and trac lights are on.
Read several threads. Cleaned MAF and replaced air filter.
Codes:
0171
p1150
p1155
pending codes
1150
1155
Car runs great.
Anyone got ideas on what next.
Should I go ahead and replace MAF, bank2 sensor1, and bank1 sensor1 all?
Was checking the air filter a coincidental with the errors?
I couldn't edit the spelling error in title

donnie boy

I forgot to add the cel and trac off lights are still on.

JSM1284

Check for a disconnected vacuum line on, or around the air filter box. it is common to accidentally pull a vacuum line loose when checking the air filter.

donnie boy

I checked all vac lines and cleaned MAF again and put in Injector cleaner in tank. I erased code. I drove about 5 mi. and the CEL and trac light came on again. I am guessing the codes will be the same. I guess I am going to replace the bank2 sens 1 at the exhaust manifold. Does this sound like the next logical step?

donnie boy

Replaced bank 2 sensor 1 with denso part oxy 75-2801 or 89467-41040, problem solved.