More Code's

trife86

Registered User
Well i did a scan on my car today and came up with two code's can anyone help me out they are 33 and 91. I understand one is to deal with EGR which i blocked off awhile ago (could a chip disable this?) and the other code i have no idea. i tried doing a search for code 91 couldnt find anything
 
91 R HEGO sensor circuit shows system lean (left side HEGO)


HEGO Heated Oxygen Sensor(HO2s) An oxygen sensor (O2s) that is electrically heated
 
Would this have anything to do with running 42lber's without a tune? How do i go about fixing this code?
 
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