Code p1860 on a 2001 Deville? How do I fix it?

could be HO2S sensors not operational
low fuel pressure
problem injectors

That code should be left rear(Drivers side rear) wheel speed sensor short to ground, Check to see if wiring has worn thru and is contacting metal some place. GM had problems with water getting into wiring harnesses in rear causing shorts.

Better check the code with code scanner. Free from shcucks or auto zone.

Probably two different issues.

The code is saying the computer sees the engine RPM is too high when shifting between park neutral and drive.
The rough idle would be something else.

The diagnostic trouble codes P0716 and P0717 are for the vehicle input speed sensor, and need to be replaced to solve it.

THAT CODE IS FOR THE LOCK UP TORQUE CONVERTER CLUTCH ,NOT WORKING /MALFUNCTION DUE TO SOLENOID PROBLEM OR CONVERTOR INTERNAL TRANSMISSION PROBLEMS. SEALS, INPUT SHAFT,O'RINGS, VALVEBODY ISSUES .MOST LIKELY NOT A SIMPLE FIX.

THIS IS SOMETHING THAT AN EXPERIENCED TECH NEEDS TO CHECK OUT .

HOPE THIS HELPS

Yes, but unless you fix it, they are just going to keep coming on. How does a transmission stall? If you hold the OFF and WARMER buttons down it should give you codes. then using the up/ down buttons it will ask if you want to clear codes, go up and it will clear codes.

check the egr valve it mat be stuck closed ..... code PO404

I had the same problem in my 99 Deville. None of the GM dealerships could fix it. It's a problem in the computer and only a Cadillac dealer can fix it. I figure it's a "give your dealership money" code. Don't remember the price, but it was around a couple hundred at the most.

Please use this link to get the codes for the car:

http://www.autozone.com/addVehicleId,1603501/initialAction,repairGuide/shopping/repairGuide.htm?pageId=0900c15280090531


Good luck...