I have a 2012 Nissan maxima and this is my first car. It's been smelling like burnt oil or transmission fluid for the past 2 weeks. I took it over a rocky dirt road a couple weeks ago. I've also had the engine replaced at 170,00 miles due to camshaft bearing failure. Could this be my transmission going as well? Please help

 

so tell us a bit about your car, the model, the maintenance (oil changes, cvt fluid changes, radiator flushes, etc) and what actions you have taken to isolate the smell. Would be easier to help to know what you have done and not done!

 

yeah it's a Nissan maxima sv 3.5L V6. I have had a used engine put into the car at 170,000 miles which is still under warranty for another month or so. I do not know what kinda maintenance was done on the car before 160,00 miles but so far I have had an oil change. I have needed my front lower left control arm placed for some time now and I need an alignment. I have recently changed the oil but not the filter to see if that was the problem. It was smoking almost a week ago but it stopped doing that from what I can see, but I can still smell burning oil or trans fluid from the back of the engine and the front passenger tire well. I have kept an eye on all of my fluids the entire time and it doesn't look like they have gone down any. I do have low coolant in my overflow tank, idk if that has anything to do with it. When I saw my check engine light come on I took the car to advance Auto to see why and the codes it was throwing said I needed an oxygen sensor my transmission fluid pressure was low and there was a transmission sensor can't remember which one it was that needed to be replaced.
Only reason Im asking for help is I don't have the money to pay a mechanic to do the work right now and I need to know if I can still drive this thing like it is or if I should throw it in the shop till I can pay for the work

 

Well, based on what you said, it seems that you need to check the fluid level of your CVT. those codes aren't good ones. BUT...you also say you see oil/fluid on the passenger fluid on the right side wheel well. This may be the oil filter, the power steering or even a seal on the right axle.
Check your fluid levels...including the transmission fluid when warm. If you can get under your car, take a look.

 

I have been checking the fluid level of my cvt and it has stayed the same. I can smell oil on the passenger side not see.