bad gas messed up o2 sensor?
i have after market header with stock y pipe, had it replaced over a year ago, and i used spacers for the o2 sensors to not get a check engine light. Had no issues. 3 days ago i was almost on E and had to us 89 octane gas in a rush. Now i got a check engine/track off light. Reset it thinking it was bad gas, went to work, filled up with 93, and drove home and the light came back on again.
I got a code p0430. Now, which sensor is this one again (sorry havent had emission issues in a while and forgot).
Should i blame this on bad gas, or could it be that my o2 sensor is just done. My 04 is300 does have 175k miles. but i find it coincidental that this all happened 1 day after putting in lower octane gasoline.
BTW im using big daddies spacers, not the cheapo autozone ones.