Got this code on my 5.3 just rebuilt the motor with .550 cam, milled heads, LTs, CAI, and efans. I got the reduced engine power light on and this code came up. Could that be a reason? I need help BAD

 

Clean the tb and maf if you have dbc take the sensors out and clean them with brake cleaner and clean maf with maf cleaner and disconnect the battery first before anything so it will clear the code for you,usually take 5 mins to clear

 

I have a Dbw tb

 

Tb is clean and so is the maf

 

I think your is removable..

 

I'll take a pic of my maf .. But it's super clean. Someone told me once I got a tune that code would go away and the reduced engine power light will go off

 

Hows your battery? Does it have full cranking amps?

 

It's brand new .. And yes it does