2002 Cadillac Deville

OBAID12

MEMBER
2002 CADILLAC DEVILLE
V8
2WD
AUTOMATIC
90,000 MILES

Hi,

My brother in law was stranded by his 02 Devil. He had check engine light for six months but that was only a heating related code and we let it be, occasionally confirming that it is only heating related and nothing else. Last night, while driving on 30, the speedometer shot to 105MPH, the check engine light came and the car died. It won't start again and he had to have it towed. I just did some googling and it appears that there is a transmission mounted speed sensor that could have gone bad, but I couldn't find anybody left stranded because of that. Any ideas? Thanks.

4 Replies

CADIEMAN

MECHANIC
3,544 POSTS

U need go to the on board cpu and read some codes. Push the off and warmer buttons on the a/c panel till u see all segments are lit then release. Write your codes down goodluck

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Sunday, March 6th, 2011 AT 9:02 PM

FACTORYJACK

MECHANIC
4,159 POSTS

Have you had success in retrieving codes? A speed sensor fault should not have caused the vehicle to stall. Press info up, and on/off together, and hold them, all the segments will light and then the info display will say ALL. Use the info button, and navigate to PCM, and press on/off. It will change to saying PCM CODES, pressing on/off will command it to display codes. Record them and report to this post, I am curious to what you find.

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Friday, March 11th, 2011 AT 3:56 AM

OBAID12

MEMBER
2 POSTS

Thanks for the replies. The car had the main ground wire broke and we had it towed to dealership who fixed it for $250. The car was not giving any display, we disconnected the battery and joined the wires to see that if it would reset things but it didn't. Changing the wire helped and we haven't seen anything since.

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Friday, March 11th, 2011 AT 4:14 AM

FACTORYJACK

MECHANIC
4,159 POSTS

One thing to check, and one reason that ground cable can fail, is a split front engine mount. It allows the engine to travel alot more during acceleration, and the cable becomes a pivot point. If you have a clunk when accelerating forward from a stop, that is another symptom.

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Friday, March 11th, 2011 AT 7:03 AM