I'm bringing her back from the dead.

I ordered a generic sensor over a year ago. It was **** right out of the box, throwing CAT below efficiency threshold codes on all 4 banks (0432 0422 etc?). I replaced with a Bosch.

13 months later, I have the camshaft sensor code again. I know better, so I order a Bosch again.

Install.. 40 miles later, I have the 4 below efficiency codes AGAIN.

Can I seriously have dealt with 4 bad sensors already? The last one was good for about 25,000 miles. This one.. 40?