check engine after truck wash

Bet your ecm got wet

 

Happens to my Cummins all the time, usually only crankcase pressure code, after couple miles down the road it clears itself

 

I'd guess since you just got it washed they got the crankcase breather filter wet. Look at the left front of the engine you'll see a plastic box. Check to see if the filter is wet. Either that or the plugin connector for the crankcase pressure sensor got wet.

 

For this when i wash my truck,everytime without enginewash,less troubles with electonic

 

They sprayed the ecm when they washed it. Before I started driving I worked in a truck wash and have had trucks that wouldn't even turn over if we got the ecm wet.