Truck seems to not be smoking as much if hardly at all and I attributed it to the cold weather, but my burnouts have seen less dramatic too, with Smarty on level 3. No check eng lights but I checked codes with the Smarty just for peace of mind and there was one code : "CHECKSUM ERROR" CODE PO602
anyone ever seen this or any clues, not even sure I have a problem but had that code.

 

The P0602 is a fuel calibration error code. If you update your smarty to the newest the code is gone.

Thanks

 

p0602 is a control module programming error/ not programmed. What this means I don't have the first clue. I would start with removing the smarty and go from there.

 

Man, Bob is fast. Good thing he was on here tonight.

 

i get that code with my pred tuner,they told me it was normal hahahaha