The o2 sensor on the durango has 4 wires. 1 is the heater wire. 1 is a common chasis ground. 1 is an ecm ground which is a "low noise" ground. 1 is the sensor wire.
The heater wire just supplies voltage to the o2 sensor so it heats up quickly. In previous years the cats would heat up the o2...
Hi all, still checking the thread :)
I ended up using an ohm meter to make sure I had continuatity. I also ended up picking up the OEM Denso sensor. Hooked up all the wires again and everything was back to normal.
The wire that was contaminated was a common ground. A common ground that was shared by the o2 sensor. The power steering pressure switch failed and pumped at who knows how psi fluid slowly but steadily into the wire. If you examine a copper wire its composed of many strands of copper wire...
Fluid was pumped into the center of the wire, it really wasn't going to get cleaned anytime soon. Plus I didn't want to short my new sensor.
Dodge also says to bypass the original in a TSB.
Hi everyone,
This isn't an easy post but I am going to try to condense it as much as possible. Recently my 2000 4.7 durango power steering pressure switch failed and it started to pump power steering fluid into my harness (common issue). The fluid got as far as my upstream oxygen sensor and...
