This procedure replaces the camshaft position sensor on the 6.7L Cummins diesel engine, which monitors camshaft rotation for fuel injection and engine timing control.

Warnings

Tools required

Parts

• Camshaft Position Sensor × 1 — Mopar 5149239AA or equivalent
• Sensor O-ring (if not included with sensor) × 1 — Use OEM specification

Preparation

1. Park vehicle on level surface and engage parking brake
2. Allow engine to cool completely (minimum 2 hours after operation)
3. Disconnect negative battery terminal to prevent electrical shorts
4. Clean the area around the sensor location to prevent debris from entering the engine
5. Retrieve any stored diagnostic codes with a scan tool before beginning (optional but recommended)

Procedure

1. 1

   Locate the camshaft position sensor
   The camshaft position sensor is mounted on the driver side of the engine block, approximately mid-way up the block near the rear. On 4WD models, access may be easier from above through the engine bay. Use a flashlight to positively identify the sensor and its electrical connector before proceeding.
2. 2

   Disconnect the electrical connector
   Press the locking tab on the sensor electrical connector and carefully pull the connector straight off the sensor. Do not pull on the wiring harness itself. Inspect the connector terminals for corrosion or damage and clean if necessary.
3. 3

   Remove the sensor mounting bolt
   Using a 10mm socket with appropriate extensions, remove the single bolt securing the camshaft position sensor to the engine block. The bolt may have thread sealant applied from the factory. Keep the bolt if it is in good condition for reinstallation.
4. 4

   Extract the sensor from the engine block
   Carefully pull the camshaft position sensor straight out of the engine block. The sensor has an O-ring seal that may cause some resistance. Twist gently while pulling if needed to break the seal, but avoid using excessive force. If the sensor is stuck, gently pry around the base with a pick tool, being careful not to damage the mounting bore.
5. 5

   Inspect the mounting bore and remove old O-ring
   Use a shop towel to wipe out the sensor mounting bore in the engine block. Inspect for metal debris or contamination. If the old O-ring remained in the bore instead of on the sensor, carefully extract it using a pick tool. Do not allow any debris to fall into the engine.
6. 6

   Prepare the new sensor
   Remove the new camshaft position sensor from its packaging and inspect it for damage. Verify the new O-ring is properly seated in the groove on the sensor body. Lightly lubricate the O-ring with clean engine oil to ease installation and prevent damage during insertion.
7. 7

   Install the new sensor
   Carefully insert the new camshaft position sensor into the mounting bore, ensuring it is fully seated against the engine block. The sensor should slide in smoothly without excessive force. Align the mounting hole and ensure the sensor orientation matches the electrical connector position.
8. 8

   Install and torque the mounting bolt
   Thread the mounting bolt by hand to ensure proper thread engagement. Using a torque wrench, tighten the camshaft position sensor bolt to specification. Do not overtighten, as this can damage the sensor housing or strip the threads in the aluminum engine block.
   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 or feel a positive click, indicating the locking tab has engaged. Gently tug on the connector to verify it is securely locked in place.
10. 10

    Reconnect the battery and clear codes
    Reconnect the negative battery terminal. If you have a scan tool, clear any stored camshaft position sensor codes. The PCM may have stored a fault code during the repair process.

Reassembly

1. Ensure all tools and shop towels are removed from the engine bay
2. Double-check that the sensor electrical connector is fully seated and locked
3. Verify the sensor mounting bolt is torqued to specification

Verification

• Turn the ignition to the ON position without starting the engine and verify the check engine light operates normally (illuminates then extinguishes)
• Start the engine and verify it runs smoothly without unusual noises or rough idle
• Allow the engine to idle for 2-3 minutes and verify no new warning lights appear
• Use a scan tool to verify there are no active camshaft position sensor codes (P0340, P0341, P0342, P0343)
• If available, check live data to confirm the camshaft position sensor is providing a signal to the PCM
• Road test the vehicle to ensure normal operation under various load conditions

More procedures for this vehicle