Conditions for Running the DTC

DTCs P0112, P0113, P0405, P0406, and P0502 are not set.
The ignition voltage is between 11-15.8 volts.
The intake air temperature is between 3-120°C (37.4-248°F).
Start up engine coolant temperature (ECT) is more than 10°C (50°F).
Engine coolant temperature is more than 65°C (149°F).
The desired EGR position is more than 0 percent and steady within 3 percent.
Air fuel ratio is more than 14.5-1.
DTC P0404 runs continuously every 125 milliseconds when the above conditions are met.