Conditions For Running DTC P0748

WARNING: This page does not describe the selected car, but rather 12 other vehicles, including the 2002 GMC Savana Special, 2002 GMC Savana Camper Special, 2002 GMC Savana, 2002 Chevrolet RV Cutaway, and 2002 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.

DTC will run under the following conditions:

The system voltage is greater than 11 volts at -40°F (-40°C) transmission fluid temperature or 12 volts at 302°F (150°C) transmission fluid temperature.
The engine must be running more than 300 RPM for at least 7 seconds, and not in fuel cut-off.