i have two error codes but no engine light yet,

p0112- Intake Air Temp.Circ Low Input
p0140- O2 Sensor Circ.,Bank1-Sensor2 No Activity Detected

any help with these problems would be great
what is needed? and where there located?

thanks in advance!

 

Need to know what year, engine, etc your car is in order to answer this.

 

sorry about that :$
2000 audi a4 1.8T quattro with a 2001 AWM engine, STOCK

 

Your post-cat O2 sensor sounds like it's dead and you'll need to clean the IAT sensor. Clean the IAT sensor, clear the codes, and drive to see if anything comes back. If so, address whichever code returns.

 

Interesting. Who did the engine swap? Do you know if they did a full wideband swap as well? What 's the part number on your ECU?

 

not to sure who did the swap, and what do you mean wideband swap? ill get the ecu # in a little bit,

and where is the IAT located? on my audi, couldn't find a picture or explanation with good description.,