It doesn't blow cold air is the only way you can tell.
A garage with AC skills will hook up gauges and check high side and low side pressures against the parameters set by the maker..
you start by looking at with trunk open the figure out which part needs removed . a repair manual purchase might be in order IF you can still find one that old
If you're finding it difficult to service/
repair your car i know a website that has every info on all vehicles and vehicle problems, with their solution In detail.. it's www.reliable-store.com
You can check the trouble codes (DTCs) with a code reader and go from there, but unless you have the necessary repair skills, you should leave it to a dealer or reputable repair shop.
I039 is a road sensing suspension problem, I042 is battery voltage too high. I would first try to clear the codes and try to figure out why the voltage is too high - often a faulty regulator in the generator.
You also seem to have a battery drain problem - something besides the keep-alive circuit is drawing it down. First check all lights (including trunk and under hood) and the rear air compressor when the car is turned off.
Road sensing problem could because of the high voltage, but could also be one of the height sensors at each wheel is detached or broken, or the RSS module has given up the ghost.
As the prescribed method isn't working it would seem likely the antitheft system is broken and should be checked by a professional.
Electronics aren't bulletproof and at over 20 years old the ones fitted to your car are 20 years less robust and 20 years less sophisticated and easily damaged by such things as welding, battery charging, jump starting or even nearby lightning strikes. Such instances often do not cause obvious damage immediately but rather have a weakening effect so the final breakdown happens later, maybe years later.
You can check on line from the different parts stores of visit your neighborhood store. They will probably need to order it. A Cadillac Dealership may have one in stock.
not many engines have a low oil sensor so it is up to the driver to keep an eye on the oil light or check the level at least every other day
if you get a socket onto the harmonic balancer nut and try to turn it , that will indicate if the motor has seized or not
clicking starter solenoids indicate loose battery terminals , dirty terminals bad ground wire connections bad battery ( load test will check that)
Any DTC codes?
It is a very bad idea to use a lot of fuel injector cleaner - you will ruin your injectors.
Is the oil loss through the engine or on the floor? How about oil in the antifreeze?
This engine has two crank sensors - when one fails, the engine will usually run rough - you can't check them, so change them both.
Did you check the traction control system? Is it always on?
A faulty EGR valve and/or TPS sensor can also often cause your misfire and power problems.
And lastly the EVAP system is tricky on these vehicles - check the vent valves and hoses.
There really is no end of things that can cause these problems.
This may be related to the antitheft system The system is known for turning off the starter and/or injectors when it fails. Normally when the injectors are turned off, the car will run for a second or two, and then stall. Is there a light on the dash that says SECURITY or a picture of a car with a lock through it? This is a common problem worth looking into. http://www.diy-gm-security.com/
? 2:09
https://www.youtube.com/watch?v=dXLzsEm1-0Y
Oct 20, 2010 - Uploaded by 1969Bossman429
We dropped our 2000 Cadillac DeVille DTS off at the local Cadillac ... He got into the vehicle, turned the key and the vehicle was still revving at full throttle. ... He raised the hood, reached in to the throttle body area and cycled ...Missing: 1994 chatter activated
Jan 17, 2005 - For my Review I will write about the 1994 Sedan Deville. ... A stifferbody this year made the Deville much quieter over the outgoing 1993 DeVille. ... First is a key when your looking at just about any Cadillac, push "off" and "warmer", this ...Have a helper hold the throttle plates wide open with the engine off.
CarGurusJan 21, 2014 - Cadillac Deville 2001 won't start, engine won't turn over - My cadillac won't start. When i turn the key the engine wont turn over and when i do turn the. ... bad replace was told alt was intermenting so that's wat caused issue now car .... intake plenum (the tube between the Mass Air Flow and the throttle body).Missing: 1994 chatter activated
