Replace the transmission range sensor (neutral safety switch) on the 2018-2024 Toyota Camry 2.5L I4 with automatic transmission to restore proper park/neutral position detection and starting functionality.

Warnings

Tools required

Parts

• Transmission Range Sensor × 1 — Use OEM Toyota part 84540-06070 or equivalent
• Transmission range sensor O-ring × 1 — Usually included with sensor

Fluids

• Toyota WS ATF — 0.5 qt

Preparation

1. Park vehicle on level ground and apply parking brake firmly
2. Place wheel chocks behind rear wheels
3. Raise and support front of vehicle on jack stands at proper lift points
4. Remove driver side front wheel for improved access
5. Remove driver side engine splash shield (multiple 10mm bolts and plastic clips)
6. Allow engine to cool if recently driven to avoid burns from hot components

Procedure

1. 1

   Locate the transmission range sensor
   From underneath the vehicle on the driver side, locate the transmission range sensor on the left side of the transaxle case. It is mounted near the manual valve shaft with an electrical connector on top and two bolts securing it to the transmission housing.
2. 2

   Disconnect electrical connector
   Press the locking tab on the transmission range sensor electrical connector and pull straight away from the sensor. Use a flathead screwdriver to gently pry the connector lock tab if necessary. Move the wiring harness out of the work area.
3. 3

   Position drain pan
   Place a drain pan directly below the transmission range sensor. Approximately 0.25-0.5 quarts of ATF will drain when the sensor is removed.
4. 4

   Remove sensor mounting bolts
   Using a 10mm socket, remove the two bolts securing the transmission range sensor to the transmission case. Keep these bolts as they will be reused if the new sensor does not include replacement hardware.
   Torque spec

   Sensor Bolts11 Nm (8 lb-ft)
5. 5

   Remove old sensor
   Carefully pull the transmission range sensor straight out from the transmission case. ATF will begin draining immediately. Allow fluid to drain into the pan. Remove and discard the old O-ring from the sensor bore or from the old sensor.
6. 6

   Clean sensor mounting surface
   Use shop towels to clean the sensor mounting surface on the transmission case. Remove any old O-ring material, debris, or ATF residue. Inspect the manual valve shaft for damage or excessive wear.
7. 7

   Prepare new sensor
   Install the new O-ring onto the new transmission range sensor. Lightly coat the O-ring with clean Toyota WS ATF to aid installation and prevent pinching. Verify the sensor alignment pin or notch is present and intact.
8. 8

   Install new sensor
   Align the transmission range sensor with the manual valve shaft, ensuring the alignment pin or flat on the shaft matches the sensor body. Push the sensor straight into the transmission case until it seats fully against the mounting surface. The sensor should sit flush with no gaps.
   ⚠Do not force the sensor. If resistance is felt, remove and verify alignment with the manual valve shaft position.
9. 9

   Install sensor mounting bolts
   Thread both sensor mounting bolts by hand to avoid cross-threading. Once both bolts are started, tighten in a criss-cross pattern to the specified torque of 11.0 Nm (8.0 lb-ft).
   Torque spec

   Sensor Bolts11 Nm (8 lb-ft)
10. 10

    Reconnect electrical connector
    Push the electrical connector onto the transmission range sensor until it clicks into place. Verify the locking tab is fully engaged and the connector cannot be pulled off by hand.
11. 11

    Check and add transmission fluid
    Start the engine and allow it to reach operating temperature. With the engine idling and the vehicle on level ground, cycle through all gear positions (P-R-N-D-L) pausing 3 seconds in each position, then return to Park. Check the ATF level using the dipstick or fill plug (depending on transmission variant) and add Toyota WS ATF as needed to restore proper level.
12. 12

    Reinstall underbody components
    Reinstall the driver side engine splash shield and torque all fasteners to specification. Reinstall the driver side front wheel and torque lug nuts to 103 Nm (76 lb-ft). Lower vehicle to ground.

Reassembly

1. Verify no tools or parts were left in the engine bay or under the vehicle
2. Double-check that the transmission range sensor electrical connector is fully seated and locked
3. Inspect the work area for any ATF leaks from the sensor installation

Verification

• Start the engine and verify it only starts in Park and Neutral positions
• Verify the gear position indicator on the instrument cluster matches the shifter position in all gear selections
• Check for Diagnostic Trouble Codes (DTCs) using an OBD-II scanner and clear any stored codes related to the range sensor
• Test drive the vehicle and confirm smooth shifting and proper gear engagement
• After test drive, recheck the area around the transmission range sensor for any ATF leaks
• Verify the transmission fluid level is correct after the vehicle has reached operating temperature

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