Conditions for Running the DTC

WARNING: This page is about a different car, the 2003 GMC Sierra and 2003 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

No TP sensor DTCs P0122 or P0123
No VSS assembly DTCs P0502 or P0503.
No TCC solenoid valve DTC P0740.
No TCC stuck ON DTC P0742.
No 1-2 SS valve DTC P0753.
No 2-3 SS valve DTC P0758.
No 3-2 SS valve assembly DTC P0785.
No TFP manual valve position switch DTC P1810.
No TCC PWM solenoid valve DTC P1860.
The engine speed is greater than 450 RPM for 5 seconds.
The engine is not in fuel cutoff.
The gear range is D4.
The TP angle is greater than 10 percent.
The transmission fluid temperature is 20-130°C (68-266°F).
The system voltage is 10-18 volts.
The engine torque is 36-295 N.m (50-400 lb ft).
The transmission output speed is 150 RPM or greater.
The transfer case ratio in 4WD low is 0.9-1.2.
The transfer case ratio in 4WD high is 2.6-2.85.