I have an 2003 Audi A4 1.8T. I changed the air filter on my car to a spectre air filter. i took out the old air filter and air filter box but i didnt touch the massair flow sensor and the check engine light came on. i pulled the codes and got the codes cleared and the light went off but came back on when i turned the car off and then turned it back on later. does anyone know what is wrong and how i can fix that? also when i changed that the traction control light came on. does anyone know why that came on and what i can do to keep it off?

 

you have to tell us what codes you have then we can begin to help you

 

Did you remember to reattach the small plastic hose that also connects to the airbox??? I got a CEL due to that error

 

so would i need to put the airbox back in cauz i took it out cauz the filter wouldnt fit in that air box?

 

i am getting a P0102 code

 

16486
P0102
Mass or Volume Air Flow Circ Low Input

This is indicating that you messed something up with the mass air flow sensor, and this is the cause of your traction control light as well. Check the wiring to the sensor and make sure you plugged it in correctly. If everything looks ok then you might have damaged the MAF sensor.