Conditions for Setting the DTC

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2011 GMC Yukon XL, 2011 GMC Yukon, 2011 Chevrolet Tahoe, 2011 Chevrolet Suburban, and 2011 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

P0741

The TCC Pressure is greater than 750 Kpa (109 PSI) for 6 seconds.
The TCM detects TCC slip greater than 130 RPM for 5 seconds when the TCC is commanded ON. This must occur 2 times.

P0742

The TCM detects the TCC slip between -12 and +13 RPM for 6 seconds when the TCC is commanded OFF. This must occur 2 times.