Seville SLS

Check Engine Light due to TCC fault on Cadillac Seville SLS

Problem Description and Possible Solution

The torque converter clutch (TTC) may stop working due to an internal transmission failure. The Check Engine Light will illuminate if this occurs. Our technicians tell us the transmission will require dis-assembly to correct this concern.

Problem Data
RepairPal Verified
Average mileage: 97,135 (56,000–150,000)
5 model years affected: 2000, 2001, 2002, 2003, more2004
22 people reported this problem
Viewing 1 - 7 of 7 comments
I had my transmission rebuilt about 2 years ago. The check engine light came on and I took it back to the
transmission shop. The technician checked it out and said the sensor and not the transmission was bad and
he would have to remove the transmission if he fixed it. He said, however, that since it was the sensor, he would recommend not fixing it because of cost. He also told me of a customer that drove a caddy for over 100,000 miles with the bad sensor and the only thing that happened was the check engine light stayed on. I can
reset the light and when cold, the car will go up to 10 miles before it comes on. If hot,only a few miles. My question is, can the sensor be disconnected or anything done to get the service engine light to stay off.
This is the third Cadillac that we've had this problem with. 1997, 2001 and now this 2003. Repair costs are from $2400 for repairs to $4000 for new transmission. The fault code is PO741
check engine light came on. mechanic thought transmission may need to be replaced but after examining the car, found that it was torque selinoid. I picked up car, and light came on again. This time I was told it was a manifold vacuum.
Was not fixed. Was quoted 1200 to repair and it is just not worth it to me. Fortunately I am not required to smog test the car in my county. I now have 239000 miles on the car. Fuel mileage is 22.5 at best on long trips.