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ok so i opened up my air box and i put that universal filter on just like the "how to" in colbaltss.net forum said to. Now after 3 days my cel light came on and i pulled the codes. p0171- system to lean bank 1 and p0603- keep alive memory. I just want to know how an air filter would make a cel light come on. Am i going to have to put tthe bottom of the air box back on with the stock filter?
 

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The 603 is from pulling the power. Mine does it everytime the battery is disconnected. I was alone until I read your post.

Same code that we get with the K&N intake, the other one.
 
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