While discussing EGR systems with a differential pressure feedback EGR (DPFE)sensor, Technician A says the DPFE sensor sends a signal to the PCM in relation to intake manifold pressure. Technician B says the PCM can make corrections to the EGR flow if the actual flow does not match the desired flow. Who is correct?
A)A only
B)B only
C)both A and B
D)neither A nor B

Question

Quizplus · Accepted Answer

The DPFE sensor measures the pressure difference across the EGR valve to determine EGR flow, not intake manifold pressure. The PCM uses this information to adjust EGR flow to match the desired levels.

While Discussing EGR Systems with a Differential Pressure Feedback EGR