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Replace CHT, code P1299- losing some coolant?

Tiny
5305A
  • MEMBER
  • 2013 FORD FUSION
  • 1.6L
  • 4 CYL
  • TURBO
  • 2WD
  • AUTOMATIC
  • 121,000 MILES
Started losing small amount coolant couple years ago. Add coolant every other oil change. Now, if wife goes to town shopping( 4 miles away), will loose 1/2" to 3/4" in tank. If drive 1-1/2 hrs. To doctor & back, loose nothing?
Didn't notice coolant low once, went to limp mode.
Replaced coolant temperature sensor, no change.
Was going to replace CHT, but can't find it. It's not where illustrations show.
Thank you.
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Saturday, August 17th, 2024 AT 12:22 PM

9 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Hi,

Are you able to locate where the coolant is leaking? Is there any evidence of white smoke from the exhaust?

I know there is a freeze plug between the number 2 and 3 spark plug tubes that can leak. It's a 20 mm freeze plug between #2 and #3 spark plug tubes that fails and (allegedly not uncommon) coolant fills the spark plug well area and drains. Not easy to find.

Check to see if there is any evidence of coolant near those two spark plug tubes.

Also, I don't think the 1.6L uses a CHT. I believe it is a traditional engine coolant temp sensor. See pic below. The code you have is Cylinder Head Overtemperature Protection Active.

Let me know.

Joe

See pic below.
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Saturday, August 17th, 2024 AT 7:32 PM
Tiny
5305A
  • MEMBER
  • 6 POSTS
Joe, is there another way I can send you info?
I had typed long message and was attaching some photos when I lost everything.
Also, I tried to send you something Sunday, but looks like never showed up?
Thanks for your assistance.
Stan
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Tuesday, August 20th, 2024 AT 6:48 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Hi Stan, the site's policy is that everything needs to be done from here. I'm sorry about that. Also, I feel bad you lost what was sent.

Let me know.

Joe
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Tuesday, August 20th, 2024 AT 7:16 PM
Tiny
5305A
  • MEMBER
  • 6 POSTS
Joe,
Thanks for the reply.
I'll try to attach a couple photos of the top of the motor and see if that works.
Stan
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Tuesday, August 20th, 2024 AT 10:02 PM
Tiny
5305A
  • MEMBER
  • 6 POSTS
Joe,
It would only let me load one photo, so I'll try again.
Stan
PS: Didn't see the edit, will try another. One view is from passenger side looking towards drivers side, other looking down on motor.
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Tuesday, August 20th, 2024 AT 10:06 PM
Tiny
5305A
  • MEMBER
  • 6 POSTS
Joe,
I'm going to try to attach all photos now.
Good luck !
Stan
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Wednesday, August 21st, 2024 AT 4:58 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Hi,

I do not see a CHT in your pictures.

The pic (pic 2) is for a different size engine. I attached pics below.

Pic 1 shows there is presently an open recall on the door latch. Pic 2 shows a CHT present on the 2.0L, 2.5L, and 3.7L but not the 1.6L.

To find the 1.6, I have to go to engine coolant temperature sensor (ECT) in pic 3. Pic 4 shows its location.

Let me know.

Joe

See pics below.
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Wednesday, August 21st, 2024 AT 7:50 PM
Tiny
5305A
  • MEMBER
  • 6 POSTS
Joe,

No wonder I couldn't find it, it wasn't there.
What could be causing the P1299?
When I replaced ETC, with a new one, the electrical connection was full of coolant, so I sprayed out with CRC contact cleaner and reassembled. The wiring at the connector looked good. Should I disconnect and get reading wires and if so, what should they read?
Suggestions?
Thanks.
Stan
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Friday, August 23rd, 2024 AT 10:28 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Hi,

When I go to the manual, the P1299 only indicates the cylinder head overtemperature protection is active.

I have diagnostics, but the next question asks if any other codes are present. Have you checked it again recently?

Joe
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Friday, August 23rd, 2024 AT 9:23 PM

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