Conditions for Running the DTC
- DTCs P0112, P0113, P0405, P0406, and P0502 are not set.
- The ignition voltage is between 11.7-16 volts.
- The ambient air temperature is more than 3°C (37°F).
- The desired EGR position is more than 0 percent and steady within 3 percent.
- DTC P0404 runs continuously every 125 milliseconds when the above conditions are met.