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Message: <blockquote data-quote="94RedGt" data-source="post: 963418" data-attributes="member: 16001"><p>When i removed the smog system i took off all the vacuum lines related to the smog system, soon after i got a cel so i reconnected only the vacuum line that goes from the intake to the little selenoid inside the fenderwell and from the selenoid to the EGR valve, leave those connected or you will get a cel . The other codes you got are normal if u removed the smog system and they do not turn on the CEL. U can probably test your O2 sensors with a multimeter, do a google search on how to do it. With a digital meter u should see the voltage increase and decrease smoothly almost as it if was making a wave, if one of the sensors have an erratic wave then they are probably bad or one of the cylinder banks is running lean or rich wich is vacuum leak possibly.</p></blockquote><p></p>