O2 CEL Code Chipped P28???? Why?
 

Ok im running a chipped P28 on a high compression LsV. The only CEL I have is an O2 sensor. This is tuned with crome, with O2's turned off. I tryed a chipped P75 and a chipped P28 that I had layin around and i have the same code with all of the ECUs. Reflashed chip and tried using the ostrage, resulting in the same CEL O2 code #1.....What the hell? And suggestions?

Re: O2 CEL Code Chipped P28???? Why?
 

sounds like you dont have closed loop turned off

Re: O2 CEL Code Chipped P28???? Why?
 

What car is this in...I have seen this a couple of times in some weird random OBD2 Civics

Re: O2 CEL Code Chipped P28???? Why?
 

ive seen some wired ---- to ok car is obd0 91 integra wiht a ls/vtec ecu is obd1p72 with obd0 to obd1 harness

it throws code 7 egr and 3 map.. i chipped it and no more cel! i i know the dc integras dont come with egr as far as i know.. just wired ---- but the guy is happy and his car runs wiht no cel now.,.