Okay, about a month ago, my check engine light came on, and I took it to the shop and I had two O2 sensors busted. Got em fixed, but the other day it came on again, right BEFORE I installed an Air Intake Filter, NOT a CIA. Took it to the shop two days ago and they said it was on because the air filter sensor wasn't on there because I put on the Intake. I dont think this is right because the light came on before the installation, so I'm very confused. Any thoughts?

 

what was the code off the ecu?

check the code off the ecu to get a definitive answer.

there is a sticky on how to check the ecu and deciper the codes.

you can find it in this forum.

hope this helps.

 

Check the ECU code here...http://vbxmaxima.8m.com/ecu.html Now what do you mean by "CIA"? Or do you mean CAI? Was the ECU reset after the O2 sensors were replaced? Make sure that filter is installed correctly and that all the plugs and wires are connected properly.