I got check engine light cel code p2195, air fuel sensor b1s1 bad, $438 to repair. any way around this? I just bought this car 4 months ago. the service person told me it was due to bad gas (damaging a sensor)!?!?!?!?! I then told him why this didn't occur to any of other cars!?

it costed me $50 for toyota to read the code. is there a cheaper alternative? other than the light the car drives fine. can I just ignore it? this is for a
2008 corolla LE. how do I clear the code/ECU?

i would say bring it to another local shop. dealerships tend to rip you off