Diagnosis code of Po136 came up when getting my tribute checked for the check engine light.Apparently it's for a bad oxygen sensor.
Has anyone had this done before? Or could it just be a bad connection as the shop said it might be? Any feedback would be appreciated.Thanks.

 

Yes. It is a code for the circuit, so it could be a bad connection. There are external circuits and internal circuits. The wiring to and from the sensor is external. Make sure that part is o.k. before you replace or let them replace the heated O2 sensor(s).