MickeyABQ Posted December 12, 2007 Report Share Posted December 12, 2007 I have a 94 DeVille that will periodically (about every other day) shut off while driving. I place the car in park and it will immediately restart. History codes are as follows; PO12, PO39, PO41, PO52, PO91, PO52 Current Code: PO39 NOSIR NOACP I looked up PO39 and it says torque converter clutch engagement problem. Any help would greatly appreciated. Thanks! Link to comment Share on other sites More sharing options...
Cadillac Jim Posted December 13, 2007 Report Share Posted December 13, 2007 P012 (E012) No Distributor Signal P039 (E039) Torque Converter Clutch/Viscous Converter Clutch Engagement Problem P041 (E041) No Cam Reference Signal from Ignition Control Module P052 (E052) PCM Memory Reset P091 (E091) PRNDL Switch Problem (transaxle range switch problem) Causes: P012, P041 mean that the magnetic signal from the distributor is lost. This will instantly kill the engine. The fact that it is intermittent, i.e. a History code and the car starts right back up, means that it is probalby a bad connection to the distributor, likely in the connector. It's possible that it is a failing sensor but not likely; a resistance check will tell the tale if you don't fix it by tightening the connectors. P039, current, means that the TCC solenoid connector or the solenoid itself is bad. This is a relatively minor but still significant repair. On a 1994 model year car, I would replace all three solenoids if I had the pan off the transmission. Others with experience in servicing older 4T60E transmissions will have better advice than I can give. P052 will happen if the battery has been disconnected lately, or if you have a bad battery connection or a tired battery that drops below 9 Volts when you start the car cold. If your battery is good, you can probalby ignore this one. P091 is a red flag. This is the switch on the shifter that tells the PCM what gear range that has been set by the shifter on the console. That's an adjustment, but it could be a bad connection, again probably at the connector. -- 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. Link to comment Share on other sites More sharing options...
Ranger Posted December 13, 2007 Report Share Posted December 13, 2007 If the TCC sticks in the engaged position, it is like trying to stop a standard transmission without stepping on the clutch. It will kill the engine. Link to comment Share on other sites More sharing options...
MickeyABQ Posted December 13, 2007 Author Report Share Posted December 13, 2007 Thanks for the suggestions, I'll try them out this weekend and hope for the best! Link to comment Share on other sites More sharing options...
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