I havbe a 2000 DTS, heres the secret, turn the ignition to the on position, but dont start the car, once you do this and the dash lights are on, look to the upper right hand corner on your instrument cluster you will see 3 buttons, hold the first one (info) and the 3rd on (on/Off) buttons down for 3 seconds or so your dash will blink and it will say all codes, hit the on/off button again and it will run through the system, it will pull up an history codes as well as current codes, have a pen ready, if you miss it, just turn the car off and repeat the procedure to get the codes, you also can search codes by PSM, etc. GREAT THING TO KNOW LOL LOL. Just wanted to send sometjhing back to the forum for helping me out in my jams with the car.


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Title and FAQ tagging

 

this kind of stuff is great .. maybe even FAQ material ..

thanks

 

if you do miss a code....you dont have to shut it down........use the left button to scroll thru to "all codes" again...there are other things in there too....something about prom id's.....and stuff....... rickyd

 

FYI, for later model Caddy's[/align][/align][/align]If you have ONSTAR they will scan for codes while you wait. The initial response is limited but if you request added information they will transfer you to a specialist who will give you current code reference number as well as any retained error codes with their meaning.[/align]

 

My most grateful thanks to the original contributor of this info. I've just used this method to access my 2001 Deville's codesand, although the actual read-outs meant nothing to me,after a couple of attempts, I was able to extinguish a "Service Engine Soon" light that had refused to stay off - even after my localindependent mechanic had replaced the apparently faulty EvacPurge Valve (in the emissions system) that his hand-held diagnostic tool suggested was the cause of the light coming on in the first place.

Before accessing the codes myself, I'd previouslybeen told by two separate service managers - one ata Pontiac/Buick etc. dealership and another one at a dedicated Cadillac dealership - that in order to sort this service light thing out, I'd need to have thecar connected to their super-duper diagnostic computer, the immediate cost of which (without anyactual work being done on the car) being a simply outrageous $130.Naturally, I declined the offer andI can tell you I got a huge kick when I'd finished seeing that infernal service light finally go out - and stay out!It's communities like this that make the internet so great.

While we're on the subject of codes, however, does anyone know of areference source that explains what all those arcane codes the car throws out actually mean?