Conditions for Setting the DTC

WARNING: This page is about a different car, the 2007 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.

DTC P0756 sets if both of the following conditions occur:

Condition 1

The PCM commands first gear for 2 seconds.
The estimated gear ratio is 0 to 1.4.
The transmission output speed is 200 RPM or greater.
The TCC slip speed is -3000-200 RPM.
All conditions are met for 1 second.

Condition 2

The PCM commands second gear for 1 second.
The estimated gear ratio is 0.9 to 1.2.
The transmission output speed is 150 RPM or greater.
All conditions are met for 2 seconds.