I've searched you tube and this forum and nothing...
Has anyone done this before? Any guidance is greatly appreciated..

Thanks again.

 

Anyone?

 

Remove the engine cover and it is screwed into the top of the engine. Should be the same for any 2.3L engine.

 

This may not apply to Hybrid 2.5L engine but there is a TSB on the 2.5L engines used in Escape and Fusion. Due to the design the cylinder head temperature(doesn't have a coolant temperature) sensor is located in a well. Water may gather and seep into pocket corroding the connector which causes incorrect temperature readings. Ford suggests using silicone grease on the rubber boot covering the sensor after the repair.

 

Just read a copy of the TSB and it does include the 2.5L Atkinson engine.

 

The following video concerning a TSB about the engine coolant temperature and/or the cylinder head temperature sensor does relate to the 2.5L Atkinson engine also. Owners might want to take a look at this on your vehicles to prevent this issue from happening.

 

Good video, thanks for posting that. Interesting that this issue is covered under the emissions warranty, important to remember that.

 

If I owned a 2.5L I wouldn't wait for it to happen unless it's a real PITA to get to as the sensor is only around $20.

 

Plus $30 more for the matching connector pigtail. Probably need to replace both if any corrosion.

Although I see Rock Auto has the sensor and connector as a set for $21, but non-Motorcraft.

 

That doesn't sound right, $30 for the Ford pigtail and Rock Auto has both cheaper.

Either way, preventing it from happening at a bad time might be worth it.

Here's a C/P of the TSB from the guy who did the video.


FORD: 2010-2012 Fusion, Escape, Transit Connect
LINCOLN: 2011-2012 MKZ
MERCURY: 2010-2011 Milan, Mariner


This article supersedes TSB 11-8-17 to update the vehicle model years and Issue Statement.

ISSUE:
Some 2010-2012 Transit Connect vehicles equipped with 2.0L engine, 2010-2012 Fusion, Escape and 2010-2011Milan, Mariner vehicles, equipped with a 2.5L engine or 2.5L Atkinson engine and 2011-2012 MKZ vehicles equipped with a 2.5L Atkinson engine may exhibit a MIL on with DTC(s) P1285, P1299 and/or P0128. Engine temperature may be cold and report as hot or be hot and report as cold. Engine cooling fan operation may also be affected by the incorrect cylinder head temperature (CHT) sensor reading - turning on or off at inappropriate times. These vehicles may also exhibit rough run, lack of power, MIL on with DTCs P0300, P0301, P0302, P0303, P0304, and/or P0316.

ACTION:
Refer to service procedure to correct the condition.

SERVICE PROCEDURE

Engine temperature concerns may be due to corrosion at connector C1164.

Inspect the cam cover trough, making sure it is clear of debris like leaves, wasps, dirt and the drain hole by cylinder 4 is open.
Inspect connector C1164 at CHT sensor for evidence of water contamination.
If evidence of water contamination is present, proceed to Step 3.
If water contamination is not evident, do not continue with this procedure. Refer to Powertrain Controls/Emissions Diagnosis (PC/ED) Manual, pinpoint test DL1 for normal diagnostics.
If corrosion from water contamination is severe and terminals are rusted and disintegrated: (Figure 1)


Figure 1 - Article 11-10-5


Cut off connector C1164 and install a new pigtail connector. Refer to instruction sheet.
Replace the CHT sensor. Refer to Workshop Manual (WSM), Section 303-14. Proceed to Step 4.
If corrosion is not severe, remove any water and thoroughly clean connector C1164 and the CHT sensor.
Before reattaching the CHT sensor cover to the cam cover, clean the cam cover and CHT sensor cover with Motorcraft® Metal Brake Parts Cleaner.
Attach the CHT sensor cover to the cam cover and add Motorcraft® Silicone Gasket and Sealant around the CHT sensor cover, to seal and prevent water entry.
Driveability concerns may be due to water entry into the spark plug wells, affecting ignition coil-on-plug(s) performance.

Inspect the cam cover trough, making sure it is clear of debris like leaves, wasps, dirt and the drain hole by cylinder 4 is open.
Remove the ignition coil-on-plugs and check for water in the spark plug wells.
If evidence of water contamination is present, proceed to Step 3.
If water contamination is not present, do not continue with this article. Refer to PC/ED Manual, pinpoint test DL1 for normal diagnostics.
Dry out the spark plug well(s).
Replace the affected ignition coil-on-plug(s), refer to WSM, Section 303-07 - Engine Ignition.
Be sure to center the ignition coil-on-plug in the bore. When tightening the last mounting fastener, the coil might become pressed to one side, biasing the seal to one side of the spark plug well, over the other.
Do not use RTV silicone sealant or dielectric grease on the boot. The spark plug boot-to-spark plug well seal is designed to breath through the molded notches in the rubber boot, to allow gases to pass freely in and out of the spark plug bore.