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Can anyone tell me what this is hanging under my car?

  • Thread starter Thread starter Luckysgirl
  • Start date Start date May 17, 2026
L

Luckysgirl

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May 17, 2026
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Oklahoma
May 17, 2026
#1
  • May 17, 2026
  • #1
Can anyone tell me what this is hanging underneath my car
 

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Noobz347

Stangnet Facilities Maint Tech... Er... Janitor
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Jan 4, 1985
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May 17, 2026
#2
  • May 17, 2026
  • #2
That looks like an O2 sensor connector.


Look at your exhaust manifold for something that looks like this:



You have two of them on each side. Follow the harness from this sensor to the connector. You will likely find that one of them is disconnected.
 

DadLife0724

Active Member
Mar 22, 2024
297
203
53
Cooperstown, PA
May 18, 2026
#3
  • May 18, 2026
  • #3
Seems odd for it to just be hanging out under there.
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
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Massachusetts
May 26, 2026
#4
  • May 26, 2026
  • #4
It's the plug for one of the rear O-2 sensor. It's obviously not plugged in.
 
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Luckysgirl

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May 17, 2026
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Oklahoma
Jun 2, 2026
#5
  • Jun 2, 2026
  • #5
It was the O2 sensor.. I took my car in for an oil change and I heard the guy say that my O2 sensor was hanging so he plugged it back in. Glad that happened because I was going to buy an O2 sensor and throttle position sensor because it was throwing those 2 codes. Replaced the tps and have no service engine soon light on now. That makes me happy but around the same time, maybe a day or two before my oil change my car overheated going on the highway. I think I may post another thread
 

Noobz347

Stangnet Facilities Maint Tech... Er... Janitor
Admin Dude
Jan 4, 1985
43,189
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234
Box behind Walmart
www.stangnet.com
Jun 2, 2026
#6
  • Jun 2, 2026
  • #6
Luckysgirl said:
It was the O2 sensor.. I took my car in for an oil change and I heard the guy say that my O2 sensor was hanging so he plugged it back in. Glad that happened because I was going to buy an O2 sensor and throttle position sensor because it was throwing those 2 codes. Replaced the tps and have no service engine soon light on now. That makes me happy but around the same time, maybe a day or two before my oil change my car overheated going on the highway. I think I may post another thread
Click to expand...

Wait to see if it happens again.
 
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