p1443

I got the dreaded P1443 on my 1996 Mazda B3000 4x4 3.0. Truck runs great, but if there's an "assembly" that has most of the parts, I'd prefer to just get that and replace it all rather than trouble shooting. Gas cap appears to be in great shape and fuses too. The vacuum hoses look old and I just...

So there has been a lingering P0420. Dont know how to test the o2 sensor but i could tell there were a couple vacuum lines collapsed and falling apart so just replaced them before spending money on new o2 sensor. Got the codes read at autozone and its still there, along with two new ones. A...