2013 Chevrolet Silverado high RPM problem

[Lilblueveteran]

I had to change out my lowbeam head lights. To do this i took off the airfilter housing which i quickly learned thatbi didnt need to do so then i took of this front cover in front of the truck un did some bolts removed the front grill and then the 3 bolts for the headlights and place it all back just the way it was know im having high RPMs with shifting issues at 35 to 40 mph at 1st it was at 60 mph can anyone help

[Dnt]

Sounds like you cracked the intake tube or housing or did not get a good seal back on the throttle body. Take ALL the intake components back off clean and inspect carefully for hairline cracks and reinstall carefully. Did you pull out the air flow sensor or just unplug it? They are easily damaged and must be handled with care. Also it will take a few engine cycles for the computer to relearn the air flow sensor if you unplugged it so make sure you give it some time.

[Lilblueveteran]

Nothing is cracked or broken just checked and i did not unplug the mass air flow sensor im at a loss here

[Lilblueveteran]

Could the mass air flow sensor or throttle postion sensor be causeing this

[Dnt]

Oh man I see what happened now, while you had the parts off a small snake crawled inside the intake tube and wrapped himself around the airflow sensor. Take everything back apart and clean thoroughly and reassemble then do about 3 drive cycles and everything will be back to normal

[Lilblueveteran]

Haha done that didnt work wished it was that easy im thinking that some how my transmission is screwed up. when engine and transmission gets warmed up i cant get over 25 mph

[CapitalTruck]

Unplug negative battery post for 10 minutes just for hahas You got a check engine light on?

[Lilblueveteran]

Will try it and no no engine light

[Lilblueveteran]

Unpluging battery didnt work I know have 3 codes P0641 sensor reference voltage A circut open

P069E Fuel pump control module

P0521 engine oil pressure sensor/switch

So im guessing i have some type of sensor or electric wire problem do these codes usually come up together?

[Dnt]

Hmmm aint that weird almost sounds like the engine is "low on oil" and is simply in limp mode.