This procedure covers the removal and replacement of the oil pressure sensor on the 6.7L Cummins diesel engine in a 2014 Ram 2500 4WD.

Warnings

Tools required

Parts

• Oil pressure sensor × 1 — Mopar 68333429AA or equivalent
• Thread sealant (Loctite 592 or equivalent) × 1 — Use OEM specification

Preparation

1. Ensure engine is cool to the touch
2. Park vehicle on level ground and engage parking brake
3. Disconnect negative battery terminal to prevent electrical faults
4. Locate oil pressure sensor on driver side of engine block, below and forward of the turbocharger
5. Place drain pan below sensor location to catch residual oil

Procedure

1. 1

   Access the oil pressure sensor
   From the driver side of the vehicle, locate the oil pressure sensor mounted on the engine block below the turbocharger assembly. The sensor has an electrical connector on top and threads into the block. You may need to reach from above or below depending on access.
2. 2

   Disconnect electrical connector
   Press the release tab on the electrical connector and pull straight away from the sensor. Do not pull on the wires. Tuck the connector aside to prevent oil contamination.
3. 3

   Remove the oil pressure sensor
   Using a 1-1/16" deep well socket or dedicated oil pressure sensor socket, turn the sensor counterclockwise to remove it from the engine block. Be prepared for a small amount of oil (approximately 1-2 oz) to drain from the port. Allow oil to drain completely into the pan below.
4. 4

   Clean the sensor port
   Use a clean shop towel to wipe the sensor mounting area on the engine block. If there is debris or old sealant in the threads, carefully clean with a wire brush. Ensure the sealing surface is clean and free of any old gasket material or contamination.
5. 5

   Prepare the new sensor
   Apply a thin, even coating of thread sealant (Loctite 592 or equivalent anaerobic sealant) to the threads of the new oil pressure sensor. Do not apply sealant to the first 1-2 threads to prevent contamination of the oil system. Allow sealant to become tacky per manufacturer instructions (typically 1-2 minutes).
6. 6

   Install the new oil pressure sensor
   Thread the new sensor into the engine block by hand, turning clockwise until finger-tight. Ensure the sensor threads in smoothly without resistance. Once hand-tight, use the torque wrench and appropriate socket to tighten to specification.
   Torque spec

   Oil Pressure Sensor20 Nm (15 lb-ft)
7. 7

   Reconnect electrical connector
   Push the electrical connector firmly onto the new sensor until you hear or feel a positive click. Gently tug on the connector to verify it is securely latched.
8. 8

   Reconnect battery and check oil level
   Reconnect the negative battery terminal. Check engine oil level on the dipstick and top off with Mopar 5W-20 synthetic blend if needed to compensate for oil lost during sensor replacement (typically minimal).

Reassembly

1. Ensure electrical connector is fully seated and locked onto new sensor
2. Wipe any spilled oil from engine block and surrounding components
3. Remove drain pan and dispose of collected oil properly

Verification

• Start the engine and verify the oil pressure gauge on the instrument cluster shows normal pressure (typically 10-15 psi at idle when warm, 30-60 psi at operating RPM)
• Check for any oil leaks around the sensor threads while engine is running
• Verify no warning lights remain illuminated on the instrument cluster
• Allow engine to reach operating temperature and recheck for leaks
• Use a scan tool to verify no oil pressure related diagnostic trouble codes are present

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