: P0741 & P1860

03-09-05, 05:05 PM
I have a friend, who has a buddy, who owns a used car lot. He came across a 2002 Deville, with 89,000 miles, that is in great shape. It has some minor issues, but runs fine. I ran the codes for him, and there were seven listed. Four of the codes were history, and three were current. Two of the current codes, were the P0741, and P1860. These have to do with the trans, or torque converter. Are these codes related to the sensor, that requires the trans to be removed, to replace? Is it possible, that there is a blown fuse? I am assuming that all of the sensors, and modules, have thier own fuses. The car shifts fine, and doesn't have any performance problems. the seller is asking $8,500, which I think is terrific. But, if the car needs many hundreds, or thousand dollars, to repair this, it may not be too good. Thanks for any help that can be given.


03-09-05, 08:05 PM
P0741.....Torque converter clutch stuck OFF
P1860.....Torque converter clutch control circuit problem

May be as simple as a fuse....something is wrong with the torque converter clutch solenoid circuit. Could be a misadjusted or disconnected brake interlock switch (at the brake pedal).... Hard to say. If the torque converter clutch is stuck off it means that it is not applying when commanded by the PCM. This won't hurt the trans. Finding the problem will take some diagnosis. Worst case is the trans side cover has to be pulled (conventional wisdom says the trans has to be dropped) for replacement of the VCC solenoid. Search using "TCC" or "VCC" or "torque converter clutch" or "viscous converter clutch" and read up. Something seems fishy about the low price on the car aside from the code....most of the time if things seem too good to be true they are...too good to be true.

03-09-05, 09:40 PM
Bbob, thanks for the reply. When my friend first told me about the car, I asked him what was wrong with it. The dealer buddy of his, said the owner just bought a new Lexus, and just wanted to get rid of it. I drove the car myself, and there doesn't seem to be any problems mechanically. I paid close attention to the cooling system, exhaust, and the overall sound of the engine. Everything seems okay. I was very surprised, to see so many codes pop up. Especially one that is for the drivetrain. The engine runs smooth as glass. I will search the forum as you suggested. If the problem does not get remedied, considering there are no driveability problems, do you think damage will result?


03-10-05, 08:33 PM
There is a new GM bulletin on the P0741 code (#04-07-30-034) that came out, maybe six months ago. It states that you have to replace the Torque converter, the side cover and a turbine shaft. Also a gasket kit to reseal the transmission. unfortunatly requires the transmission to be removed. Its probably $1,200 in parts. If the car isn't under warranty I wouldn't suggest buying it.

03-10-05, 08:50 PM
I have seen when you have these 2 codes together the tcc solenoid connector will be burnt/melted and can be replaced without trans removal. It is trickey to do but can be done. There is always the possibilty that the converter and seals could have a probelm also. You got to ask yourself Are You Feeling Luckyhttp://cadillacforums.com/forums/images/smilies/wink.gif

03-12-05, 06:33 PM
Cadtech, don't you still have to lower the eng., trans. and subframe to get the side cover off for access to the tcc solenoid?

03-12-05, 10:22 PM
You still have to lower the trans. enough to get the side cover off. I would take the frame/cradle assemble right off and then lower the trans./engine down enough to get the cover off. It looks a little scarey when you do it but it doen't seem to hurt anything. Just be sure you have any wires up top unconnected so you don't break them when you lower it down. Cadtech