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Ford EcoSport Camshaft Position Sensors Replacement Guide
How to change a faulty camshaft position sensor in a 2013 to 2021 Ford EcoSport with the 1.0L I3 engine.

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2020 EcoSport 1.0L I3
Black Plastic Valve Cover
Front Camshaft Sensor
This automotive maintenance tutorial was specifically written to assist owners of the second generation 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020 and 2021 Ford EcoSport compact SUV equipped with the EcoBoost turbocharged 1.0 liter inline three cylinder engine in changing failing or faulty camshaft position sensors. (The procedure should be the same or very similar for the 2.0L I4 and 1.5L I3 engines.)

Owners of other Ford or Lincoln vehicles such as the Fiesta, B-Max, Escape, Edge, Bronco Sport, Explorer, Expedition, Transit, Focus, Mondeo, S-Max, Puma, Kuga, Endura, Everest, Ka, Figo, Endeavour, Aviator, Corsair, Nautilus and Navigator may also find these DIY instructions to be helpful.

The EcoBoost turbo 1.0L I3 engine is equipped with two camshaft position sensors (also known by the acronymns "CPS", "CMPS" or "CMP").

The OEM (original equipment manufacturer) part number is Ford CM51-12K073-BB (also known asFoMoCo CM5112K073BB or CM5Z6B288A).

Two compatible replacement aftermarket camshaft position sensors with their part numbers are as follows: NTK EC0262 and WVE 5S15088.

The tools needed to remove and replace the two sensors include an 8mm socket and a 1/4" drive ratchet.

The first two steps are to open the hood and move to the left (passenger) side of the engine bay.

The two sensors are situated on the top of the black plastic valve cover near the yellow plastic handled dipstick and the first spark plug ignition coil on the left side of the engine.

I'm pointing to the front sensor in Picture # 3 and the rear sensor in Picture # 4.

Just a few of the possible symptoms of a bad camshaft position sensor include the following: difficulty starting the engine, jerking, stalling, surging, reduced performance (slower acceleration), reduced fuel economy (lower MPG), automatic transmission shifting problems (such as "limp-home" mode), a rough idle and a CEL (check engine light) or SES (service engine soon) warning on the gauge cluster.

If you have an OBDII scanner (also known as an OBD2 scan tool), some of the camshaft position sensor related DTCs (diagnostic trouble codes) that you might see include P0340, P0341, P0342, P0343 and P0344.


Rear Sensor Location
Close Up of Rear Sensor
Push In Release Tab
For this tutorial, I'll be removing and replacing the rear sensor.

Push in the release button on the electrical connector before sliding it straight off the top of the old sensor.

Disconnect Power Plug
Loosen Counterclockwise
Remove Single Bolt
Attach your 8mm socket to a 1/4" drive ratchet. I found it helpful to also use a short extension bar.

Loosen the bolt by turning it in the counterclockwise direction.

Spin out the bolt the last few turns with your fingers to help avoid having the bolt drop down into the engine bay and become lost.

Single Silver Bolt Removed
Pull Out Old Sensor
Old Sensor Removed
Set the bolt aside in a safe place.

Gently rotate the old sensor back and forth a few times to make sure the rubber o-ring gasket is not stuck (or "frozen") to the valve cover.

Pull the old sensor straight out of the port.

Inspect Rubber O-Ring
"3009D" On Side
CM51 12K073 BB
Inspect the old sensor for any damage or sludge deposits.

The OEM sensor was marked with the part number FoMoCo (Ford Motor Company) CM51 12K073 BB (Doune 3009D).

Sensor Port Valve Cover
Install New Sensor
Spin In Bolt Clockwise
Carefully lower the new sensor into the opening.

Rotate the sensor until the bolt hole lines up with the bolt hole in the valve cover.

Spin in the bolt a few turns by hand in the clockwise direction to help prevent it from becoming cross threaded.

Tighten Bolt Clockwise
Push On Power Plug
Start Engine - Test Sensor
Tighten the bolt in the clockwise direction with the 8mm socket and a 1/4" drive ratchet until it is snug.

Try to avoid over tightening the bolt to prevent from cracking the plastic sensor assembly.

Push the electrical connector straight on to the new sensor.

You should hear or feel the power plug "click" securely into place.

Clear any camshaft position sensor related DTCs with an OBDII scanner or it may be possible to clear them by disconnecting the negative terminal of the 12V battery for at least 10 to 15 minutes.

To test the new sensor or sensors, start the engine and watch the gauge cluster for a SES / CEL warning light.

Take the SUV for a very short and careful test drive to see if any of the previous symptoms appear.

Don't forget to write down the procedure in your vehicle's service records.

For more, check out all of the 2013-2021 Ford EcoSport DIY Repair & Maintenance Guides.

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