So I replaced the cps on my wife's 2003 disco a out a month or so ago and it started acting up again. I bought it from O'reilly's. Was wondering if maybe I should try a different brand like Bosch any help would be great.

 

A Bosch sensor is what originally came with the car so I would go get that. When it comes to engine sensors on Discos, only use Bosch. I haven't had any luck with other brands on my Disco, not even top notch ones like Denso.

 

Thanks I kind of figured that was the case. Also will it throw a rash of codes when it is bad? Before I only had an emissions code and now I have a bunch.

 

It is very possible that the wrong brand sensor caused a lot of other codes as well. Replace it with a Bosch sensor, clear the codes, then go from there.