In further preparation for the old girl's annual Healthcare, I pulled the following codes with the GAP IID:

0x41A Lambda control adaption exceeds lower limit bank 1

0x40C O2 sensor circuit bank 1 downstream sensor

Car is running sweet, no warnings, no check engine light, no hiccups, good (as normal) mileage.

Wouldn't have known had I not read the codes.

All 4 O2 sensors were replaced 3 years ago ~80K Km

Should I just add a new sensor to the work list or is there anything else I should be looking at?

Thanks