how many 02 sensors

[youngblud]

Just got a engine check light and mechanic told me my cat and 02 sensor might be the problem. He told me I'm missing an o2 sensor. Said I should have one between the cats. I only see one coming from the exhaust header and one from the downpipe. Am I missing something?

 

[Noisy Crow]

What are you driVING (mobile site doesnt show section, just post title)

 

[Dr0]

i highly doubt your missing one, theres only 2 02 sensors. And what was the code for?

 

[Stiki]

if your driving an MSP there should only be 2, one on the exhaust manifold and one after the cat if im not mistaken, running a straight pipe so not sure if it was between the cat and resinator