Durango 02 Sensor Wiring Diagram. Let the truck warm up. I am replacing my upstream 02 sensor and the plug that goes up into the frame broke off and there is not any room to splice another end on it.
Same as on the wiring diagram i sent you if you zoom to like 200 you can read it perfectly. All the grounds tie together at g105 near the camshaft position sensor. But at the pcm connector 1 pin 26 is the signal input for the 21 o2 sensor.
You dont need any expensive diagnostic test equipment all youll need is a multimeter.
On some models its under the passenger seat under the vehicle and it plugged into the exhaust. If the code stays or returns after having gone. A four wired oxygen sensor has four wires two wires for the heater circuit and two wires are for the sensing element. The signal wire is supposed to be the light green with red stripe.