My truck has been running flawless for the past year and then I get these codes. I scanned the truck and my LT trims on both banks went from -1.6 to around -10 to -13 at idle. I thought it might be a dirty MAF as I have an STS turbo and i get a little oil in the intake now and then. I cleaned it twice but no help.

My question is how can I tell I tell if my MAF is working correctly? Is these a set voltge or flow rate I should look for?

I get both codes on BANK1 and BANK2 so I am assuming it is not an o2 sensor.

Anything else I can look for?

 

I am in the same situation. Ever since I had the tune reflashed for the 60lb injectors my ses comes on for a day and shuts off. Does that repeatly. Also have problems dieing when come to a stop or trying to find idle. Scanned it and said bank 1 and bank 2 lean. Gonna try replacing front 02's and maf and see if that fixes it.

 

i have the same problem also

 

Colder than normal temps outside? Condensation on your MAF??
Don't know where you live soo....

 

your o2s are going out those oare the same codes i threw when i ran leaded gas and fried the o2s replace the sensors

 

The front o2's on both sides?? Or all 4?

 

Just the front two. With the engine idling tap on the MAF with a screwdriver handle. If the engine stumbles then the MAF is bad.