Code Enable Criteria

PCM will run diagnostic for this DTC under the following conditions:

• Engine is running with EGR duty cycle and pintle position at less than 50 percent.
• System voltage is 9-18 volts.
• Throttle angle is less than 50 percent.
• MAP and TP sensor values are steady for more than 10 seconds.

DTC will set when the difference between actual airflow and predicted airflow is greater than a calibrated value.