1995 Other Jeep Models when you replace a sensor do you need

I really doubt it. Is the check engine light on while driving or does it intermittinly come on. If it is stalling i would think it would have a hard code set. Some of your parts stores like autozone and o'reilly's scan computers for no charge and will tell you the codes. If you can get the codes than get back to me with them, dont let them sell you a bunch of parts tho??? Check back hear first, please. Thanks Curt