I was wondering about the fact that there do seem to be two oxygen sensors. I checked out a Haynes Repair Manual (for Honda CRV’s) from my local library, and it only shows one sensor in the catalytic converter. (So why, indeed, do I see two?) The $420 did include the sensor, but it still seemed like a lot of money. I was tempted to repair it myself, but afraid of braking a corroded part — maybe I should have been braver. Maybe next time. Thanks for writing in.

I am glad you did some investigating about your problem, although It looks like the picture of your exhaust you have two oxegen sensors one is probably heated and the other is regular. You can easily take these off with a oxegen sensor wrench, which sometimes you can rent from parts stores, maybe even free. Also a little dab of a penetrating type oil to loosen can help. As far as engine lights as we drive our cars the computer checks various monitor’s under different loads city and highway. Some monitors only test themselves at certain times. I hope that 420.00 repair included the sensor because that was quite high.

You are clearly my hero of the week.