DTC P1514: Actual MAF & Speed Density Is Greater Than Expected: Description

The PCM uses the Throttle Position (TP) sensor, Barometric Pressure (BARO) sensor, Intake Air Temperature (IAT), and engine RPM to calculate an expected Mass Airflow (MAF) rate. The PCM compares this value to MAF value and the speed density calculation in order to verify the proper throttle operation.