Maybe stupid question.

whats up.Got d16z6 engine it has 4-2-1 manifold but i've noticed that there is a bolt in the hole for the lambda sensor and i can't see the sensor anywhere. Does that mean i dont have it ? or its in some other place, Got this car a month ago, so i didn't properly look at the engine itself, aswell if there is no lambda sensor can that cause the car to drink to much petrol,???

