Some of the symptoms of a bad camshaft position sensor include rough idling, lower fuel economy (reduced MPG), stalling, slow acceleration, stumbling idle, reduced power, vibrations, rough starting and a CEL / SES (check engine light, service engine soon) indicator on the gauge cluster.

If you have an OBDII scan tool (also known as an OBD2 scanner), you may see the camshaft position sensor related DTC (diagnostic trouble code) P0340.

Owners of other Ford and Lincoln vehicles such as the Escape, Expedition, EcoSport, Flex, Explorer, Fiesta, Focus, Fusion, Mustang, Taurus, Ranger, Transit Connect, F-150, Endura, C-Max, Kuga, Mondeo, MKZ, Navigator, Aviator, Nautilus and Continental may also find these DIY instructions to be helpful.

The original OEM camshaft position sensor is part number Motorcraft DU103.

A compatible replacement aftermarket sensor is the Standard Motor Products PC917.

The tools needed to remove and replace the "CMP" or "CPS" sensor include an 8mm socket with a 1/4" drive ratchet and possibly also a plastic pry bar tool.

The first two steps are to open the hood and gently pull off the plastic engine cover.

The cover is held in place by four rubber friction fasteners on the underside that are attached to four pegs or "spikes" on the top of the engine.

Set the cover aside in a safe place.

The camshaft position sensor is located just to the right of a spark plug ignition coil, to the left of the air intake tube mounting bolt and below the air intake tube.

I'm pointing to the sensor in the picture above.

The tab is very stiff, so you may need a plastic pry bar tool to push down the button.

Slide the power plug straight off the end of the sensor.

Remove the single silver metal bolt that secures the sensor to the top of the engine by turning it in the counterclockwise direction with an 8mm socket and a 1/4" drive ratchet.

Set the bolt aside in a safe place.

Gently pull the old sensor out of the port (opening) in the engine.

If you have trouble removing the sensor, rotate it back and forth to loosen it.

Try to avoid using excessive force.

The old sensor should slide out of the port relatively easily.

The compatible replacement Ford part number is Motorcraft DU103.

You could also purchase the aftermarket Standard Motor Products PC917 sensor.

Line up the bolt holes in the new sensor with the corresponding hole in the engine.

Spin in the bolt a few turns by hand in the clockwise direction to make sure it doesn't become cross threaded.

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 housing.

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

Line up the rubber friction fasteners on the underside of the plastic cover with their corresponding pegs or spikes on the top of the engine.

Push the cover down into place to secure it.

Start the engine and listen closely for any strange sounds that might indicate a problem with the new sensor.

Use your OBD2 scan tool to clear any camshaft position sensor related error codes.

Turn off the ignition and turn it on again to see if the SES / CEL light re-appears on the gauge cluster.

Be sure to record the sensor change in your vehicle's service records.

Please check out all of my 2015-2019 Ford Edge DIY Repair & Maintenance Guides.