I have a 2007 Pontiac G5 GT 2.4 VVT Ecotec 132200 miles automatic trans. Not idling quite right and tripping codes PO301,PO300,P1174. Started checking live data to try to figure out problems. The maf sensor is only reading 0.4 idling 1.0 reading revving to 2000 rpm. This seemed to low so cleaned the maf sensor and reading stayed the same. What should a normal maf reading be? I thought it should be closer to engine 2.4. Want to be sure before buying another sensor and could that be a contributing factor to those codes. Car has newer plugs and already checked coils and recently changed injector 2 cause it was stuck open.
What should a normal maf reading be?
it should be at least 2.0 g/s. Try unplugging the MAF and see if engine runs any better.
Have you got a clean air filter in there? Any silly aftermarket stuff? (K&N, "cold air intake" , etc)
If it's all fine then it probably needs a new OEM MAF.
Yeah new air filter. Also all stock original no aftermarket intake.