I just bought a 2002 crv with 130k miles, and I bought it with a check engine light on from a used car dealer.
The entire exhaust system looks new, and there are receipts in the car from past work. Two of the receipts are from advanced auto parts, from the same day, a few hours apart. One receipt has one o2 sensor for a 2002 crv. The other has an o2 sensor and a catalytic converter for a 2003 crv. I’m assuming they installed all 3 of these parts (and purchased the 2003 parts because the 2002 parts weren’t in stock), but they are just part receipts not installation so I can’t be sure.
Anyway, I think the reason they got rid of the car is because they replaced all of this and the check engine light came back on, and they lived in PA which has emissions checks and I think they got fed up and gave up.
Basically I’m just wondering what you guy think, why did the CEL come back on? The car runs really well and has no noticeable issues.
MINOR UPDATE: This is almost a non-update because I haven’t done anything to the car, and the check engine light is still on, but I’ve done a little bit of research and I think I know what’s going on. Apparently Hondas are very sensitive to the cat + 02 sensors used, and if you use an aftermarket cat a lot of the times it won’t perform up to the very high standards of the car and the check engine light will stay on. Looking at the receipt, the previous owners purchased this http://shop.advanceautoparts.com/p/walker-epa-ultra-direct-fit-converter-16167/18390603-P?searchTerm=catalytic+converter so therefore I have concluded that I am going to just live with the check engine light because I don’t think it is harming anything, I just have a crappy cat!
Final actual edit: The catalytic converter started making a new, even worse noise so we took it back to the muffler shop, and the catalytic converter is dead we are taking it to a mechanic today to fix whatever killed the cat, and then we’re taking it back to the muffler shop to replace the cat. I’ll update with what caused the death, and then hopefully this saga will be over!