02 Sensor not getting voltage?

2004 FORD EXPLORER
175,000 MILES
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TONY02
  • MEMBER
  • 86 POSTS
I have the vehicle listed above that is not getting any voltage on bank 2 sensor 1 oxygen sensor. I replaced it already twice with a brand new one but still not getting any voltage. I also tried wiggling the wiring all the way up to the engine bay but it still stays on 0 voltage. I did all this with the car at operating temperature which should have given the 02 sensors to have some type of voltage all of my other sensor is getting voltage.
May 22, 2024 at 1:50 PM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
Hi,

If you are getting power to bank 2 sensor 2, my first is a faulty splice in the wiring. Take a look at the pic below. Note that splice (S103) is a connection between the two sensors for power.

Follow the red wire with a yellow tracer back from the sensor to locate the splice. Check for power at the splice. If power is present, the splice itself has failed.

Let me know what you find,

Joe

See pic below.
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May 23, 2024 at 6:26 PM
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