[amidgeha]

MAP/MAF - Throttle Position Correlation

The Powertrain Control Module (PCM) monitors a vehicle operation rationality check by comparing Throttle Position (TP) to Mass Air Flow (MAF) readings. If during a self-test, the comparison of the TP sensor and MAF sensor readings are not consistent with the calibrated load values, the test fails and a diagnostic trouble code is stored in continuous memory.

Cause:
Faulty Mass Air Flow (MAF) sensor
Large vacuum leak
Leaking air duct system
Mass Air Flow (MAF) poor electrical connection
Manifold Absolute Pressure (MAP) poor electrical connection
Faulty Manifold Absolute Pressure (MAP) sensor
TP sensor not seated properly
Faulty Throttle Position (TP) sensor

Symptoms:
Check engine light
Lack/Loss of power
Engine rough idle