The following statements are all correct EXCEPT ________.
A) some systems monitor EGR operation by using a pressure feedback EGR sensor
B) a potentiometer is used to determine EGR valve position on many OBD-II systems
C) low restriction exhaust systems will have no effect on EGR system operation
D) the PCM controls vacuum applied to vacuum operated EGR valves

Question

Quizplus · Accepted Answer

Low restriction exhaust systems can actually increase EGR flow and affect EGR system operation by altering exhaust backpressure. The other statements are correct.

The Following Statements Are All Correct EXCEPT ________