Please help

[Trubz89]

So I just bought a 2001 nissan pathfinder le. Has 66k on it. It was throwing a check engine code for the 02 sensors and ever since I've had them replaced more problems have been coming up. Right after sensors were changed I drove 95 miles n ses light came back on for an 02 sensor. Been reading all about the problems that people have so I bought a new air flitter for it, cleaned the mass air flow sensor, added transmission fluid and filled it up with preminum gas. When starting the car up the engine revs to about 2200 rpms n drops back down after a second. When driving the car on the hwy it has very slow pick up and when your going about 60-70 the engine just loses power n drops down to about 50. Not sure what direction I should go in. Any help would be greatly appreciated.

[Towncivilian]

Could you pull engine codes (Advance Auto, AutoZone, maybe other parts stores will pull codes for free) and post them here? It'd be helpful.

Welcome to NICO!

[Trubz89]

I actually undid the battery last night so check engine shut off. Just put 50 miles on it and it drove perfect and check engine hasn't come back on yet. Will post up codes if light comes back onn

[Trubz89]

Thank you for replying

[Slumpert]

My Pathy takes about 180 miles local driving to trigger / clear the light.. The CPU is crazy slow like that..