The sound only start after the car is warm (about 30+ min of driving) and is only present at idle or very low RPM. Once i accelerate, the sound goes away. When the issue is happening, the car has a very slight misfire. I'm guessing these two issues are connected because there is no misfire if the sound is not happening.
P0101 - mass or volume air flow A circuit range/performance
P0300 - random/multiple cylinder musfire dected
P0301 - Cylinder 1 misfire detected
P0302 - Cylinder 2 misfire detected
I plan to replace my plugs and coils seeing as it is getting close to that time, although i'm not sure if the hissing sound is related to the mass air flow sensor or it could be a different issue.
Any help would be appreciated!