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 TCC DTC P0742.
No VSS assembly DTCs P0502 or P0503.
No TCC solenoid valve DTC P0740.
No TFP manual valve position switch DTC P1810.
No TPS high or low DTCs.
The transmission fluid temperature is 20-150°C (68-302°F).
The TP angle is 20-99 percent.
The engine speed is greater than 450 RPM for 5 seconds.
The engine is not in fuel cutoff.
The speed ratio is 0.89-1.02, the speed ratio is engine speed divided by output speed.
The gear range is D2, D3 or D4.
The gear range does not change within 6 seconds.
The TCC is commanded ON for 5 seconds.
The TCC duty cycle is 75 percent or greater.