4 wires O2 sensors vs. 3 Wire O2 sensors...

phils89sc

Registered User
I have a pair of new 4 wire oxygen sensors from a 96 Mustang 3.8L. These will fit in the holes for the oxygen sensors on my 89 SC, but the number of wires is wrong. Mine has 3, the new ones have 4, two white, a black, and a grey wire. Can the 4 wire be made to work on my 89 SC?

Thanks

Phil

What does each wire do?
 
I would say no it can not be made to work since the 4 wire has a signal ground tied back to the EEC and the 3 wire uses chassis ground. Also there is no assurance the function curve is the same for both sensors.
 
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