This procedure covers the removal and replacement of the camshaft position sensor on the 2014-2019 Toyota Corolla 1.8L I4 engine, located on the cylinder head.

Warnings

Tools required

Parts

• Camshaft position sensor × 1 — 90919-05060 or equivalent OEM
• Sensor O-ring × 1 — Typically included with sensor

Preparation

1. Park vehicle on level ground and engage parking brake
2. Allow engine to cool completely
3. Disconnect negative battery terminal and wait 3 minutes for airbag system to discharge
4. Remove engine cover by pulling upward on the four corner clips

Procedure

1. 1

   Locate the camshaft position sensor
   The camshaft position sensor is mounted on the passenger side of the cylinder head, just below the valve cover and near the timing chain cover. It has a single electrical connector and is secured by one 10mm bolt.
2. 2

   Disconnect the electrical connector
   Press down on the locking tab of the electrical connector while pulling it straight away from the sensor. You may need to gently rock the connector side-to-side while pulling if it is tight. Do not pull on the wiring harness itself.
3. 3

   Remove the sensor mounting bolt
   Using a 10mm socket with extension, remove the single bolt securing the camshaft position sensor to the cylinder head. Keep the bolt in a safe location as it will be reused unless damaged.
4. 4

   Extract the sensor from the cylinder head
   Carefully pull the sensor straight out of the cylinder head bore. There may be slight resistance from the O-ring seal. If stuck, gently twist while pulling. Do not pry against the sensor body or cylinder head surface.
5. 5

   Clean the sensor bore
   Using a clean shop towel, wipe out the sensor bore in the cylinder head to remove any old oil or debris. Check the bore for any foreign material that could interfere with the new sensor installation. Do not allow debris to fall into the engine.
6. 6

   Prepare the new sensor
   Inspect the new camshaft position sensor and verify it has a new O-ring installed. If the O-ring is separate, install it onto the sensor body. Lightly coat the O-ring with clean engine oil to ease installation and prevent damage.
7. 7

   Install the new sensor
   Carefully insert the new camshaft position sensor straight into the cylinder head bore, ensuring the O-ring does not roll or get pinched. Push the sensor in until it is fully seated against the cylinder head mounting surface.
   Torque spec

   Camshaft Position Sensor10 Nm (7 lb-ft)
8. 8

   Torque the sensor mounting bolt
   Install the sensor mounting bolt and hand-tighten. Using a calibrated torque wrench, tighten the bolt to 10.0 Nm (7.0 lb-ft). Do not over-tighten as this can crack the sensor housing.
   Torque spec

   Camshaft Position Sensor10 Nm (7 lb-ft)
9. 9

   Reconnect the electrical connector
   Push the electrical connector onto the new sensor until you hear and feel a positive click, indicating the locking tab has engaged. Gently tug on the connector to verify it is fully locked in place.
10. 10

    Reinstall engine cover and battery
    Align the engine cover over the mounting posts and press down firmly on each corner until all four clips snap into place. Reconnect the negative battery terminal.

Reassembly

1. Ensure electrical connector is fully locked with no gap between connector and sensor body
2. Verify no tools or shop towels were left in the engine bay
3. Double-check that the sensor mounting bolt is torqued to specification

Verification

• Start the engine and verify it runs smoothly without rough idle or stalling
• Check that the Check Engine Light does not illuminate or that camshaft position sensor codes (P0340, P0341, P0342, P0343) are cleared
• Use an OBD-II scanner to verify camshaft position sensor is reading properly in live data
• Inspect the sensor area for any oil leaks around the O-ring seal after engine reaches operating temperature

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