is there only 2 sensors on a 2001 ram 5.2L 4x4? Which ones should i buy?

 

The one before the cat controls the air/fuel mixture the one after just monitors the cat to see if it is working. If you are looking to try to get better gas mileage replace the front one.

 

I know mine only has two. I'd replace them both, they are only like 38 bucks and I think they are both important for the system to run properly. The only downside is getting them plugged in because the plugs are on top of the tranny where you can't see them.

 

thanks for the info...