Question 1
A P0422 (catalytic converter efficiency failure) is set. What is a possible cause?
◦ Engine mechanical fault
◦ Exhaust leak
◦ Fuel contamination
◦ Any of these
Question 2
All these are causes of catalytic converter failure EXCEPT ________.
◦ Contamination
◦ Excessive temperature
◦ Incorrect air/ fuel mixture
◦ All of these are causes of converter failure.