Conditions For Running DTC (4L80-E Transmission)

WARNING: This page does not describe the selected car, but rather 11 other vehicles, including the 2002 GMC Yukon XL, 2002 GMC Yukon, 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, and 2002 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.

No TPS DTCs P0122 or P0123.
No VSS DTCs P0502 or P0503.
No DTC P0730.
The engine is running greater than 60 seconds.
The system voltage is 6-18 volts.
The commanded gear is 3rd or 4th.
The PTO mode is not active.