Conditions For Running DTC

WARNING: This page is about a different car, the 2003 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

DTCs P0336, P0340 or P0341 not set.
Engine Coolant Temperature (ECT) is greater than 158°F (70°C).
A/C is off.
Brake is applied.
Transmission in Park or Neutral.
Vehicle speed is zero MPH.