Question

I have a 2003 Buick LeSabre 3.8L V6 with code P1811 and p0742, how do I fix the problem?

Answer 1

Looks like you have two different problems. Any other symptoms? have you done anything to try fixing the problem?

If you have no symptoms you could try just clearing the code first.

P1811 BUICK - Maximum Adaptive & Long Term Shift
Read more: https://www.autocodes.com/p1811_buick.html

P0742 BUICK - Torque Converter Clutch Circuit Stuck On
Read more: https://www.autocodes.com/p0742_buick.html