I keep getting P0101 code, things I have done was clean out stock air box with any dirt or debris....

I replaced air filter, clean MAF it went away for about 10 miles then came back....

So, I replaced the MAF drove it for 40 miles and it came back.....

I have recently replaced my wheel bearings and fuel filter...I know they shouldn't have anything in common but I have gained 2MPG this is also after replacing the sensor.

I also have the P404 code due to the EGR block....Any help

 

any after market air filter?

 

No. It's completely stock.

 

in my opinion it has to be something with the sensor. i have saw this problem with cummins after a cold air intake. clean and clean again.

 

I guess i try to clean the already new sensor. If it doesn't fix it...I'll go back to the place I bought it from and see if they will exchange it

 

i forgot till just now i also saw this problem with a duramax after they changed a normal air filter. the guy was telling me last week end at the pulls. i am wondering if something is wrong with his napa stock replacement messing with the sensor.