2006 Acura TL Check Engine Light p0420
Just bought a 2006 Acura TL about 2 weeks ago from a used car dealer. It has only 47,000 miles on it and is in phenomenal condition. It has had 2 previous owners and it appears to be slightly modified. Has a body kit and an extra exhaust.
The check engine light came on and after taking it to an AutoZone I was informed it was a P0420 error. I know that this could be a sensor or possibly the catalytic converter.
I recently put a tank of regular gas in it by accident. I was wondering if this could be one of the causes as well?
I already have it scheduled to take back to the dealer I bought it from to find out more, but it is not until Monday and I have been freaking out because I just bought it. I also plan on taking it to the Acura dealer if my dealer will not do anything about it, but they charge to look at it and fix it if it turns out to only be the sensors.
Any thoughts or advice would be appreciated!