Author Question: A P0131 DTC is being discussed. Technician A says that an exhaust leak upstream of HO2S (bank 1) ... (Read 26 times)

Marty · **on:** Aug 13, 2021

Question 1

A low O2S voltage could be due to ________.
◦ A rich exhaust
◦ A lean exhaust
◦ A defective spark plug wire
◦ Both B and C

Question 2

A P0131 DTC is being discussed. Technician A says that an exhaust leak upstream of HO2S (bank 1) oxygen sensor could be the cause. Technician B says that an extremely rich air-fuel mixture could be the cause. Who is right?
◦ Technician A only
◦ Technician B only
◦ Both technicians A and B
◦ Neither technician A nor B