Conditions for Setting the DTC
WARNING: This page is about a different car, the 2018 GMC Yukon XL, 2018 GMC Yukon, 2018 Chevrolet Tahoe, 2018 Chevrolet Suburban 3500 HD, and 2018 Chevrolet Suburban. However, it is still accessible from the selected car via links, so may be relevant.
P2714
The Transmission Control Module has detected an incorrect gear ratio or neutral condition when the 2-6 clutch is commanded ON. This condition must occur 3 times.
P2715
The Transmission Control Module has detected an incorrect gear ratio change when the 2-6 clutch is commanded OFF during a shift or when 2nd gear ratio is detected in 1st gear. This condition must occur 3 times.