Fault code help
 

Hey everyone I just bought a 95 montero 3.0 and to say the least I'm pretty new to this brand and engine. My montero has been running rough on cold start so I decided to pull codes and only got 11.

Ive seen posts say its a o2 sensor, others say things like missfire, not enough fuel or restriction, and tps.

Could use advise and input on what call did to fix or what yall recommend i do next. Thanks!!

How did you pull the codes? 11 is O2 sensor. see if you can figure out which one it is? I don't remember if the engine has 1 or 2? If there are 2, unplug one and see if the issue changes. If it doesn't, that's the one to replace. If there is only one sensor, replace that one.