Recent content by mikeya

Follow up Here's some follow up on my initial post - As I mentioned, I got a new upstream, and later a new downstream O2 sensor, both were Bosch, from my local auto parts store. This was before I got on this site and found post after post saying stay away from Bosch, use only Denso. Anyway...

I appreciate the help - thanks - hoping I won't need to replace the cats

I'm new to the site, not as experienced as most of you, but I'm learning. Here's the question: 1999 T4R, purchased used in PA, but it's a Cali vehicle, has 140K miles. It's been giving me the p0420 code - I've replaced both the upstream and downstream O2 sensors with Bosch (before I read you...