Manifold Absolute Pressure Sensor

This procedure covers the removal and replacement of the Manifold Absolute Pressure (MAP) sensor on the 2007 Ram 3500 with the 5.9L Cummins diesel engine.

Warnings

Tools required

Parts

• Manifold Absolute Pressure (MAP) Sensor × 1 — Mopar 5033307AA or equivalent
• Electrical connector seal (if damaged) × 1 — Use OEM specification

Preparation

1. Ensure engine is cool to the touch
2. Turn ignition key to OFF position and remove key
3. Locate the MAP sensor on the intake manifold near the front of the engine, passenger side
4. Have replacement MAP sensor and cleaning supplies ready

Procedure

1. 1

   Access the MAP sensor
   Open the hood and secure it in place. Locate the MAP sensor (intake manifold air pressure/temperature sensor) mounted on the intake manifold of the engine. It is mounted directly to the intake manifold and has an electrical connector; verify exact location and connector pin count against service documentation.
2. 2

   Disconnect the electrical connector
   Release the connector locking tab (slide or press as applicable) on the electrical connector while pulling the connector straight away from the MAP sensor. Do not pull on the wires themselves. If the connector is difficult to remove, gently wiggle it side to side while pulling.
3. 3

   Inspect the connector and seal
   Examine the electrical connector terminals for corrosion, damage, or contamination. Check the rubber seal on the connector for cracks or degradation. If contaminated with oil or dirt, clean with electrical contact cleaner and allow to dry completely.
4. 4

   Remove the MAP sensor
   The MAP sensor is retained by mounting screw(s)/bolt(s) on this engine. Remove the mounting fastener(s) with the appropriate socket and carefully pull the sensor from the intake manifold. Note the orientation of the sensor for reinstallation.
5. 5

   Inspect the mounting port
   Examine the MAP sensor mounting hole in the intake manifold for debris, carbon buildup, or damage. Clean the mounting surface with a shop towel. Do not allow any debris to fall into the intake manifold.
6. 6

   Install the new MAP sensor
   Verify the new MAP sensor has the correct O-ring or seal installed. Insert the new sensor into the intake manifold port in the same orientation as the old sensor. Install the mounting fastener(s) and tighten to the manufacturer-specified torque (typically low, around 7-9 ft-lbs for an M6 fastener) to avoid cracking the sensor body.
7. 7

   Reconnect the electrical connector
   Push the electrical connector firmly onto the MAP sensor until you hear or feel it click into place. Ensure the connector locking tab is fully engaged. Gently tug on the connector to verify it is securely attached.

Reassembly

1. Ensure the MAP sensor is securely mounted and the electrical connector is fully locked in place
2. Verify no tools or parts were left in the engine compartment
3. Close the hood

Verification

• Turn the ignition key to the ON position without starting the engine and verify the check engine light illuminates then goes out during bulb check
• Start the engine and allow it to idle for 30 seconds, listening for smooth operation
• Verify no diagnostic trouble codes are present using an OBD-II scanner
• Test drive the vehicle to confirm normal throttle response and boost pressure operation
• Check for any vacuum leaks around the MAP sensor mounting location while engine is running

Related trouble codes on this vehicle

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