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2003 CTS


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I got a PM this morning with the following message, I am not familiar with this problem, maybe we have a member who is. I directed the member here.

I would say check for DTC codes but this appears to be a mechanical problem with the ignition switch. How are the codes checked in a CTS, does this car have OBD2 with CAN? Is a reader needed?

Please help!!

My 2003 cts won't run and key cannot be removed .

Radio shows service theft system.

Please explain what needs to be done.

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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All cars sold in the US beginning with the 1996 calendar year have OBD II. I don't know when GM switched from "class 2" (CAN modified for PWM) to CAN on the OBD interface (I suspect that they stayed with the faster and more robust CAN-compatible-on-the-message-level class 2 internally). I don't know whether the 2003 CTS had the diagnostic mode available on the dashboard, but all Cadillacs gave that up about that time. If so, you will need a good reader that looks at IPM codes, not just PCM or emissions-related codes like most aftermarket code readers that sell for under $100.

It sounds to me like your friend tried to use a cheap replacement key that either had the wrong chip or resistor, had a mismatch in the tumblers or key grooves, or some combination of these. I would suggest that he start with a locksmith to get the key out and to try a "real" key (f the one that had the problem wasn't a "real" key) and go from there; he probably won't need the OBD codes. At this point, you will need the OBD codes to diagnose any continuing problems.

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-- Click Here for CaddyInfo page on "How To" Read Your OBD Codes
-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data
-- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC
Yes, I was Jims_97_ETC before I changed cars.

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Thanks guys, this member PM'd me directly, I don't know him.

I was under the impression that the CTSs did not have the ability to read codes from the dash but a reader with CAN capability could read the P codes, thanks Jim

It would be great if this was only a dead battery

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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I had the dead battery problem and unable to remove the key on mine also...

Same as Winterset...left a phone charger plugged in and my radar detector "ON" for several days..

Charged the battery and all was well...

Hope that is all that is wrong with his CTS...

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Great Jim

My guess is that this is the result of the brake LOCKOUT, not being functional when the battery is dead

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Pull your battery out and have it charged and then load tested, if it is dead, either way have it load tested

Also clean the battery connections

BE VERY CAREFUL WORKING AROUND A DEAD BATTERY, THEY GIVE OFF GAS AND ARE EXPLOSIVE WHEN THEY ARE DEAD

DO NOT ATTEMPT TO JUMP A DEAD BATTERY USE A CHARGER, ITS NOT GOOD FOR THE CAR DOING THE JUMPING AND ITS NOT GOOD TO CHARGE A TOTALLY DEAD BATTERY WITH THE ALTERNATOR IT DRAWS TOO MUCH ESPECIALLY IF ITS GOT INTERNAL PROBLEMS, YOU WILL DAMAGE YOUR ALTERNATOR

THE KEY IS TO AVOID SPARKS

DISCONNECT THE NEGATIVE CABLE FIRST, AND CONNECT THE NEGATIVE CABLE LAST WHEN HOOKING UP/DISCONNECTING A BATTERY

WITH A CHARGER CONNECT THE NEGATIVE CHARGER LEAD LAST, THEN, PLUG IN THE CHARGER

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Great Jim

My guess is that this is the result of the brake LOCKOUT, not being functional when the battery is dead

I think "SOME" models of the CTS had a secret button on the bottom of the steering column that you can push to make the ignition switch turn all the way off so you could get the key out...

I do not know "WHICH" models have that.

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Here's a pair of Owner's Manual pages that may be helpful. It might also jog Texas Jim's memory. ;)

Regards,

Warren

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There is no means of avoiding the final collapse of a boom brought about by credit expansion. The alternative is only whether the crisis should come sooner as the result of a voluntary abandonment of further credit expansion, or later as a final and total catastrophe of the currency system involved. - Ludwig von Mises

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Well, it looks like the attachment disappeared into the ether. I don't see any way to add it using the EDIT function, so here goes again . . . .

2003 Key Release Button.doc

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There is no means of avoiding the final collapse of a boom brought about by credit expansion. The alternative is only whether the crisis should come sooner as the result of a voluntary abandonment of further credit expansion, or later as a final and total catastrophe of the currency system involved. - Ludwig von Mises

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Thanks guys, I am sure that will help our member a lot

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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