mybowtiess Posted February 12, 2011 Report Share Posted February 12, 2011 I am getting a tune but I have two codes come up need to know if I have to have them fixed before I get the tune? One is P0101 MAF Sensor Signal Range/Performance could this be caused by MAF Sensor being descreen. The other is P0442 EVAP System Small Leak. Quote Link to comment Share on other sites More sharing options...
O2 WS6 TA Posted February 12, 2011 Report Share Posted February 12, 2011 I am getting a tune but I have two codes come up need to know if I have to have them fixed before I get the tune? One is P0101 MAF Sensor Signal Range/Performance could this be caused by MAF Sensor being descreen. The other is P0442 EVAP System Small Leak. 1) Yes 2) Tighten your gas cap. Quote Link to comment Share on other sites More sharing options...
70chevy03ss Posted February 14, 2011 Report Share Posted February 14, 2011 Tight or replace gas cap. Also replace you vent seliond!! Quote Link to comment Share on other sites More sharing options...
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