Author Question: Technician A says that the secondary air injection (SAI) system forces air at low pressure into the ... (Read 133 times)

armygirl · **on:** Jun 23, 2018

Technician A says that the secondary air injection (SAI) system forces air at low pressure into the exhaust to reduce CO and HC exhaust emissions. Technician B says that a check valve is used between the AIR pump and the exhaust manifold to prevent exhaust gases from damaging the AIR pump and valves. Who is right?

A) Technician A only B) Technician B only C) Both A and B D) Neither A nor B

Question 2

The OBD-II system checks the EGR valve for operation by _______.

A) Opening and closing the EGR valve B) Flashing the MIL
C) Cycling the DTC system D) Drawing a vacuum on the EGR valve