Question about 2002 Cadillac Deville

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Service engine soon light comes on 2002 sedan deville. Diagnostics indicate transmission and torgue converter. The transmission runs perfectly and the transmission is new from the factory June 2008. About 18,000 miles. This was classified as a good will trans, replacement which is another story which only come with a 12,000 mile one year warranty.My previous cadi had the identical problem and the same diagnostics referring to the transl which was running perfectly. What is this BS and is GM programming these computers to generate business. The dealer is Ed Morse Sunrise Fort Lauderdale, Fl where I will never ever buy another car especailly a Cadillac. .

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In short, yes they are doing this to generate business.
They also make diagnostics difficult, so we have to take them back for a "plug in" for a high fee.
I have a Peugeot with the same deal & it stinks.

It could be set within the engine management system to time out after a while if you do your own servicing.

Buy an OBD II reader that will connect to your vehicle that should be able to reset this - and tell you of any real problems.

There are many makers of these - so make sure it will work for your make and model, and that it can reset engine lights.

Posted on Feb 08, 2010

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Two codes coming up on car even after fixing alot on car now need to figure out low cost ways to fix P0744 & P0722 code issues spent 1,800 on car & have spent 1,400 already in parts & labor.


you need a better mechanic that traces ALL of the possibilities of each code, not just read the code and trow in a part hoping that it's fixed ~ it can be wiring as well, not just plug in a new part as mentioned on the 2nd trouble code to the vehicle speed sensor

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Hello
When the service engine soon light (Also called the check engine light or engine management light) is turned on this is to alert you to the fact that Powertrain Control Module (computer) has detected a failure somewhere in the systems it controls you may not feel any difference in the way the engine runs, this can be the transmission or the engine or emission system, there are fault codes set in the modules memory for these faults. What needs to happen now is to have the powertrain control module scanned with a special tool called an OBD2 electronic engine control scanner or a OBD2 code reader. Once the code(s) are read then you must perform the diagnostics for each code and make the appropriate repairs based on the findings of the diagnosis that was performed, this is called doing "Pinpoint" testing.

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My service engine light is on, took it was put on the machine and came back with the code po741 which was said to be a transmission problem. Took it to a transmission shop and was told that my...


Subject:
Service Engine Soon (SES) Light On, Diagnostic Trouble Code (DTC) P0741, Torque Converter Clutch (TCC) Excessive Slip, Transaxle Chuggle, Slip/Surge (Inspect/Replace Internal Transaxle Components) #04-07-30-034 - (08/06/2004)
Models:
1998-2002 Cadillac Eldorado
1998-2004 Cadillac Seville
1999-2004 Cadillac DeVille
2000-2003 Oldsmobile Aurora
there is a write up on this about 3/4 page down.

http://www.cadillacforums.com/forums/cadillac-forum/t-107360.html

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1 Answer

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2000 Cadillac deville


could damage the transmission. the soliniod is like $50 on ebay. and a mechanic will charge a few 100 to do the job

Feb 21, 2010 | 2000 Cadillac DeVille

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I replaced the transmission in my 1998 oldsmobile intrigue and now the service engine soon, abs ans tcs lights won't turn off. I have had diagnostics run on it and no codes are found on the computer. I...


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The car runs rough and seems to want to ''creep'' at stops


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1 Answer

No passing gear


My car did (past tense) the same thing. The service engine light is flashing until you let off the gas because raw fuel is being dumped into the catalytic converter. The transmission won't shift because the converter is plugged. When you push the pedal to the floor the transmission computer holds the transmission in gear. Meanwhile the engine computer is raising the rpms. It will seem like a transmission problem but it is more likely a plugged catalytic converter. I had converter changed. The engine has A LOT more power, great acceleration and the transmission shifts perfectly.

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