Hi new member here i have a proble with my 2003 Cadillac SLS in the morning i saw a oil leak underneath the left front wheel also later on i went to the store a 40 mile drive then when i was two blocks away from getting home i noticed the Service engine soon light come on now iwas told mot to drive my car until i took it to the shop but i need a secound opinion PS when i saw the oil i checked it saw that it was getting low so i poured in a quart of pennzoil fully syntetic Code i get is PCM PO741









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PO741 = TCC stuck OFF.
meaning, a transmission solenoid has most likely failed or is seeing some difficulty.
solenoid costs about $50, labor about 2 days.

BUT .. before you do the shop thing.

1. CHECK transmission fluid level, engine hot, idle, on level ground. If low, fill to level.

2. clear the code and drive it to see if it stays away .. specially if fluid was low.

3. If is intermittent, try a flush, pumping the fluid out, refill and pour a bottle of Lucas Transmission fix ..

your gamble is that it costs much less than 2 days of labor above, if it works, you are all set,
if not, your back at ground zero.

 

Just endured the dreaded P0741 on 1998 STS with 180K miles.
I braced for the transmission overhaul option, as the tranny has a bad reputation.
The dealer found an intermittent shorting, and replaced a 10A fuse.

TCC torque converter is a big problem - hope you don't need this