Conditions for Running the DTC

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

No TP sensor DTCs P0121, P0122, or P0123.
No VSS DTCs P0502, or P0503.
No AT ISS DTCs P0716 or P0717.
No TCC DTCs P0742 or P1860.
No TFP manual valve position switch DTC P1810.
The system voltage is 8-18 volts.
The gear ratio must indicate 2nd or 3rd gear.
The throttle position is 10-100 percent.
The TFP manual valve position switch must be in D4, D3, or D2 and has not changed in 6 seconds.
The transmission fluid temperature (TFT) is 20-150°C (68-302°F).
The TCC duty cycle is greater than 60 percent and locked on greater than 1 second.