Conditions for Running the DTC

WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.

DTC P0100, P0101, P0102, P0103, P0116, P0117, P0118, P0119, P0125, P0449, P0498, P0506, P0507, P0700, P2227, P2228, or P2229 is not set.
The engine is operating for greater than 1 second.
The ambient air temperature is greater than -7°C (19°F).
The vehicle speed is between 10-30 km/h (6-19 mph).
The BARO is greater than 68 kPa.
The fuel level is between 12-88 percent.
The ECM has commanded the EVAP canister vent valve open for greater than 4 seconds.
DTC P0450 and DTC P0451 run continuously once the above conditions are met for approximately 30 seconds.