Ok, this is not funny anymore... I am still waiting for the weekend to do some work on the car, but the situation is getting worse evey day!
This morning the car stalled few times and the oil warning light was going on every time you give the car some gas.
We parked the car, and waited a couple of hours, now the oil light is constantly on when you start the car (oil level looks fine), and code 43 started showing up (in addition to code 21).

Can someone tell me what I should add to the (to-check) list? I have the spark plugs, pre-cat o2 sensor, ignition wires on the to change list for the weekend. What else is there? I am especially concerned about the oil light situation.

 

Oil light could be the oil sending unit going bad. Code 43, check your spark plugs, wires and coil pack. You may need to change out your spark plug tube seals also.

 

So I just changed the plugs, and code 43 is gone! Though the old plugs looked really good so I think the 02 sensor issues are triggering code 43.
I am changing the 02 sensor saturday; however, it was recommended that I clean the IAC while I am at it.

1. Where can I find the IAC. (if you can please be a little detailed on where to find it - I am an uber noob)
2. What can I use to clean the IAC? Is WD40 okay?

Thank you all

 

The IAC is on the side of your TB. Look up top in the Parts Location sticky. There is a pic of it in there.