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Hyundai Tucson Camshaft Position Sensor Replacement Guide
How to change a faulty camshaft position sensor in a 2016, 2017 and 2018 Hyundai Tucson SUV with the Nu 2.0L I4.

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2018 Tucson Nu 2.0L I4 Engine
Pull Off Plastic Engine Cover
Lift Rear of Engine Cover
This automotive maintenance tutorial was specifically written to assist owners of the third generation (2016, 2017, 2018 plus the updated 2019 and 2020 model years) Hyundai Tucson SUV in changing a faulty camshaft position center (or "TDC" top dead center sensor) for the Nu 2.0 liter GDI inline four cylinder engine.

A few of the symptoms of a failing or faulty camshaft position sensor include the following: rough idling, stalling, a loss of power, reduced fuel economy (lower MPG), slow acceleration, difficulty starting, jerking, surging and a CEL / SES (check engine light / service engine soon) warning light on the dashboard.

Owners of other Hyundai, Kia and Genesis vehicles such as the Santa Fe, Kona, Elantra, Sonata, Accent, Veloster, Ioniq, Nexo, G80, G90, Stinger, Rio, Forte, Optima, Cadenza, K900, Soul, Niro, Sportage, Sorento and Sedona may also find these DIY instructions to be helpful.

The Nu 2.0L GDI I4 engine has two camshaft position sensors and their OEM part number is Hyundai / Kia 39350-23910 (also known as part # 39350 23910 or 3935023910).

The tools needed to complete this procedure include a 10mm socket with a 1/4" drive ratchet and a plastic pry bar tool.

Plastic Engine Cover Removed
Top of Nu 2.0L I4 Engine
Right Side of Engine
The first two steps are to open the hood and then pull off the plastic engine cover.

(The steps for replacing the camshaft position sensor might be the same for the 1.6L Turbo GDI engine.)

The plastic engine cover is held in place by four rubber friction fasteners attached to four metal pegs on the top of the engine.

Set the engine cover aside in a safe place.

Move to the right (driver) side of the engine. The two camshaft position sensors are located on the top of the black plastic valve covers.

Pointing To Two Sensors
Loosen Counterclockwise
10mm Bolt Removed
In Picture # 7 in the row above, I'm pointing to the location of the two camshaft position sensors.

(I recommend doing the next two steps in the reverse order that I performed them in the pictures.)

First, use the plastic pry bar tool to pull the metal retaining clip off the top of the old sensor.

Set the retaining clip aside in a safe place.

Old Sensor Removed
Pull Off Metal Retaining Clip
Retaining Clip Removed
Then remove the single bolt that holds the sensor in place to the top of the motor by turning it in the counterclockwise direction with a 10mm socket and a 1/4" drive ratceht.

Set the 10mm bolt aside in a safe place.

Pull Off Electrical Connector
Inspecting Old Sensor
Bottom of Sensor
Gently pull the old sensor straight out of the engine.

You may need to rotate it back and forth a bit to loosen it if the sensor feels stuck.

Inspect the old sensor for any signs of degradation or damage.

If you have an OBD II Scanner (A.K.A. OBDII, OBD2 or OBD 2), some of the camshaft position sensor related DTC (diagnostic trouble codes) that you may see include the following: P0340 - camshaft position sensor circuit malfunction, P0341 - CPS circuit range / performance issue, P0342 - CPS circuit low input, P0343 - CPS high input, P0344 - CPS circuit intermittent, P0345 - CPS sensor A circuit malfunction and P0390 - CPS B bank circuit malfunction.


Hyundai / Kia 39350-23910
Empty Front Sensor Port
Push In New Sensor
Make sure that the rubber o-ring gasket from the old sensor is not still attached to the engine.

The compatible replacement camshaft position sensor part number is Hyundai / Kia 39350-23910.

Carefully push the new sensor into the port (opening) in the top of the engine.

Push On Power Plug
Replace Retaining Clip
Spin In 10mm Bolt
Push the electrical connector straight on to the base of the new sensor.

Gently push the metal retaining bar over the top of the new sensor to secure the power plug into place.

Spin in the 10mm bolt a few turns by hand in the clockwise direction to prevent it from becoming cross threaded.

Avoid over tightening the bolt to prevent from cracking the plastic sensor housing.

Lower Engine Cover
Push Down To Secure Cover
Engine Cover Replaced
Double check that the bolt on the sensor is tight and that the electrical connector is securely in place.

Line up the four rubber friction fasteners on the underside of the engine cover with their corresponding metal pegs.

Push the engine cover back down into place.

Start the engine and listen closely for any strange sounds or noises that may indicate a problem such as a loose power plug or a loose sensor. Check your OBD2 Code Scan Tool for any DTC codes.

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

For more, check out all of my 2016-2018 Hyundai Tucson DIY Repair & Maintenance Guides.

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