2000 CADILLAC SLS CADILLAC SLS CODES: P0741 & P1860 TCC

  • Tiny
  • zmaniak
  • 2000 Cadillac SLS

Transmission problem
2000 Cadillac SLS V8 Front Wheel Drive Automatic 164K miles

Vehicle is setting service engine soon light for codes: P0741 & P1860
741= TCC stuck off
1860=PWM solenoid electrical fault
Both codes seem like they could be the result of the same failure however, I would like to know if I can reasonably troubleshoot this gripe with the tranny still in the car? Prob cause could simply be a short or open circuit which I should be able to confirm before obligating to a full on transmission overhaul.
In your experience, are these codes a sign of the devil?
I'm praying that is not the case; quote for repair over $4,000

Tuesday, August 31st, 2010 AT 5:30 PM

3 Answers

  • Tiny
  • factoryjack
  • Expert
  • 4,263 posts

Since you have an 1860 attached, it is most often a faulty solenoid(melted connector). With a P0741, it can also indicate leakage in the hydraulic circuit, a faulty converter, or both. If you could read TCC slip data, you could determine for one if it is applying, and what the level of slip is.

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Wednesday, September 1st, 2010 AT 12:52 AM
  • Tiny
  • zmaniak
  • Member

Thanks for your reply.

How do I obtain TCC slip data?

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Wednesday, September 1st, 2010 AT 12:19 PM
  • Tiny
  • factoryjack
  • Expert
  • 4,263 posts

It would have to be viewed on a scan tool.

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Wednesday, September 1st, 2010 AT 9:10 PM

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