Author Question: OBD-II regulations require that the EGR system be tested. Technician A says that the PCM can monitor ... (Read 20 times)

HudsonKB16 · **on:** Aug 13, 2021

OBD-II regulations require that the EGR system be tested. Technician A says that the PCM can monitor the commanded position of the EGR valve to determine if it is functioning correctly. Technician B says that the PCM can open the EGR valve and monitor for a change in the MAP sensor or oxygen sensor reading to detect if the system is functioning correctly. Which technician is correct?
◦ Technician A only
◦ Technician B only
◦ Both technicians A and B
◦ Neither technician A nor B