Irratic idle, car stalls, cel flickers, engine rough

Hello. I own a 2004 Hyundai Elantra gls.

It has approx 160k kms on it. I took it to a mechanic to replace my high pressure power steering hose.

Also replaced spark plugs, air filter and cleaned maf sensor. Car ran great for few hours then out of nowhere my idle started to bounce from 800 to 2k rpms while wither driving or parked. When it jumped it makes an audible click sound and CEL light flickers each time it does but usually never leaves and codes. Main code i get is bank 1 02 sensor hot.

Ill try to upload some code pictures i took and a short video of this happening.

What i have done so far.



Replaced spark plugs

Checked spark plug gap



Air filter

High pressure power steering hose



Changed MAF sensor



Changed IAC sensor



Cleaned throttle body



New clamps on throttle body



Changed fuel pump relay

Changed main relay



Changed crank sensor

Changed engine coolant temperature sensor



Tested cam sensor

Tested crank sensor wiring

Tested battery



Tested alternator



Smoke test vacuum leak passed cold

Changed coil packs

Cleaned all grounds and reconnected



Added additional body ground