P0136 - 1996 Ford ranger

Question

I've replaced a 02 sensor behind the cat and its still throwing an o2 sensor circuit code I checked fuses and voltage its good should I exchange the new 02 sensor to see if it's a faulty sensor

Answer 1

Hi there,

It is possible the sensor is bad. If you are getting the right voltages at the sensor, then you need to check them at the PCM. You can do this with either a scan tool or follow the wiring to the pcm and check it with a volt meter. A broken or pinched wire can cause this as well as an exhaust leak.