What does the post, or downstream, oxygen sensor (HO2S) measure? ...

[drink]

What does the post, or downstream, oxygen sensor (HO2S) measure?
 
  A) Amount of oxygen in front of the catalytic converter
  B) Amount of H2O in front of the catalytic converter
  C) Amount of oxygen behind the catalytic converter
  D) Amount of H2O behind the catalytic converter

Question 2

What is the first step in diagnosing variable camshaft timing systems?
 
  A) Verify the customer concern B) Check for DTCs
  C) Open the hood and do a visual inspection D) None of these

[Zebsrer]

Answer to Question 1

C

Answer to Question 2

A

[drink]

Thanks for the timely response, appreciate it

[sarah_brady415]

Great answer, keep it coming