Check engine light... which friggin code it is?
PA sensor is your atmospheric pressure sensor. It will allow your ecu to adjust accordingly to where you are in the world. You can leave it checked, it won't affect anything.
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I just got the n/a portion of my map tuned perfectly.... Now comes the boost 
Too bad I have no idea how to tune the ignition map so I'll just leave it at the conservative level the basemap had

Too bad I have no idea how to tune the ignition map so I'll just leave it at the conservative level the basemap had


