Hello

I have a 1987 Dodge Ram 50 California emissions model. It has the check EGR light on. I have replaced the EGR valve. I have switched the switch in the dash to the right and back to the left. When it is in the right position the light turns off. Soon as I switch it back to the left, the Check EGR idiot light comes back on.

I have examined the O2 sensor and it is missing. It appears that one of the previous owners removed the O2 sensor and replaced it with a spark plug. I do not see the wire for the o2 sensor even if I installed an O2 sensor which is missing. Any idea what kind of connector/wire I should use to connect the O2 sensor? Any idea where it connects? A picture would be great.

John