DTC P1514: Calculated Vs Actual Airflow Correlation High: Description

The Powertrain Control Module (PCM) uses the following readings in order to calculate the predicted Mass Air Flow (MAF) rate:

• The Throttle Position (TP).
• The Barometric (BARO) pressure.
• The Intake Air Temperature (IAT).
• The engine RPM.

The PCM compares the predicted MAF value to the actual MAF value, and to the speed density calculation in order to verify the proper throttle operation.