Which OBD input sensor will detect less fresh airflow into the engine when the EGR valve opens because EGR gas replaces fresh intake air?
A)MAP (manifold absolute pressure)"
B)EGR flow"
C)MAF (mass air flow)
D)EGR valve position sensor"

Question

Quizplus · Accepted Answer

The MAF (mass air flow) sensor measures the amount of air entering the engine. When the EGR valve opens, exhaust gases replace some of the fresh air, leading to a decrease in the airflow detected by the MAF sensor.

Which OBD Input Sensor Will Detect Less Fresh Airflow into the Engine