Engine code P0022

Tiny
DKDODGE1516
  • MEMBER
  • 2007 LINCOLN MKX
  • 3.5L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 198,000 MILES
When I got home to take a look at it and I seen it was leaking some fluid. I caught it in a cup and it smells like coolant but it’s black. Also I saw there’s no coolant in the coolant reservoir. I’m not going to run it anymore because it sounds weird and I’m thinking it must be burning coolant. But I just drove it 500 miles today. But it will be sitting until I hear back from someone.
Tuesday, April 16th, 2019 AT 5:19 PM

6 Replies

Tiny
SCGRANTURISMO
  • MECHANIC
  • 4,897 POSTS
Hello,

Coolant doesn't burn like that. The only way coolant burns is it get combusted in the combustion chamber and exits the exhaust as a sweet smelling white smoke. It can only be introduced into the combustion chamber through a blown head gasket or crack in the water jacket of either the engine block or the cylinder head.
This sounds to me like this is engine oil. Is there any way for me to take a picture of it and upload it for me. Any liquid that is black is going to almost be engine oil. When was the last time it was changed?
I have included the description and vehicle manufacturer factory troubleshooting guide for this Direct Trouble Code (DTC) in the diagrams below. Please go through the guides and get back to us with what you find out.

Thanks,
Alex
2CarPros
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Tuesday, April 16th, 2019 AT 11:43 PM
Tiny
DKDODGE1516
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  • 22 POSTS
You want a picture of the fluid? And when I took the oil cap off there was like steam or white some starting to come out.
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Wednesday, April 17th, 2019 AT 4:09 AM
Tiny
DKDODGE1516
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  • 22 POSTS
Also it has been 3,200 since last oil change. I change it ever 5,000.
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Wednesday, April 17th, 2019 AT 5:07 AM
Tiny
SCGRANTURISMO
  • MECHANIC
  • 4,897 POSTS
Hello again,

Can you describe for me in detail or take a video of where this coming out of vehicle at, please? That is not oil, but I have never seen antifreeze that color before either.

Thanks,
Alex
2CarPros
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Wednesday, April 17th, 2019 AT 9:27 PM
Tiny
DKDODGE1516
  • MEMBER
  • 22 POSTS
It’s just when it gets warmed up and then it really just starts coming out I’ll have to send you a video after work. And the coolant that comes in the reservoir after it warms up it the same black color. And I can see but it’s pretty hard to see where it’s coming from and when you rev it up the engine does not sound normal.
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Thursday, April 18th, 2019 AT 7:22 AM
Tiny
SCGRANTURISMO
  • MECHANIC
  • 4,897 POSTS
Hello again,

Im starting to think that you might have a blown head gasket. This would account for the color of the coolant. Can you do me a favor and take off the oil fill cap and see if you have a thick bunch of brown, coffee looking sludge on the bottom of the cap?
I have sent a few links down below for you to go to.

https://www.2carpros.com/articles/coolantantifreeze-in-the-engine-oil
https://www.2carpros.com/articles/how-to-test-engine-compression
https://www.2carpros.com/articles/head-gasket-blown-test

Please go through these guides and get back to us with what you are able to find out, please.

Thanks,
Alex
2CarPros
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Thursday, April 18th, 2019 AT 7:28 AM

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