Conditions for Running the DTC

Before the engine control module (ECM) can report DTC P0446 failed, DTCs P0441, P0442, and P0456 must run and pass.
DTCs P0106, P0107, P0108, P0112, P0113, P0116, P0117, P0118, P0122, P0123, P0131, P0132, P0133, P0134, P0135, P0137, P0138, P0140, P0141, P0201, P0202, P0203, P0204, P0300, P0402, P0404, P0405, P0406, P0443, P0451, P0452, P0453, P0454, P0461, P0462, P0463, P0464, P0488, P0498, P0499, P0502, P0506, P0507, P2110, P2195, and P2196 are not set.
One of the following conditions is met:
- The ignition is off for greater than 12 hours.
- The start-up intake air temperature (IAT) and the start-up engine coolant temperature (ECT) are within 8°C (46°F).
The ignition 1 voltage is between 10-16 volts.
The barometric pressure (BARO) is more than 72 kPa.
The start-up ECT and start-up IAT are between 4-34°C (39-93°F).
The start-up IAT is 3°C (37°F) less than the actual IAT.
The purge enable time is less than predetermined value based on startup ECT.
The fuel level is between 6-93 percent.
The engine run time is between 1-360 seconds plus purge enable time.
The restricted path test time is completed in less than 220 seconds.
DTC P0446 runs once an ignition cycle when the above conditions are met.