Conditions for Running the DTC
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 Cadillac Escalade EXT. However, it is still accessible from the selected car via links, so may be relevant.
P0776
- No DTCs P0716 or P0717 are active or have failed this key on.
- No DTCs P0722 or P0723 are active or have failed this key on.
- No DTC P1825 is active or has failed this key on.
- Ignition voltage is between 8.6-18.0 volts.
- Transmission fluid temperature (TFT) is equal to or greater than 0°C (32°F).
- TCM high side driver (HSD) 1 is enabled.
- Average driven wheel speed is 80 RPM or more.
- Side to side average wheel speed between driven and non-driven wheel is 150 RPM or less for 6 seconds.
- The transmission input shaft speed is greater than 60 RPM.
- PC solenoid 2 is commanded On.
- 3rd (1.532:1) or 5th (0.852:1) gear ratio has been achieved.
P0777
- No DTCs P0716 or P0717 are active or have failed this key on.
- No DTCs P0722 or P0723 are active or have failed this key on.
- No DTC P1825 is active or has failed this key on.
- TFT is equal to or greater than 0°C (32°F).
- The transmission input and output shaft speed is greater than 200 RPM.
- PC solenoid 2 is commanded Off.