How to Replace the Oil Pressure Switch on a 2002 Dodge 1500

by Christian Killian
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red truck engine image by Christopher Nolan from

The 2002 Dodge Ram pickup has an oil pressure sending unit, or switch, located near the oil filter on the engine block. The function of the switch is to send information to the computer regarding the current oil pressure in the engine. The computer in turn sends that information to the gauge on your dashboard so that you can monitor it visually as you drive.

Step 1

Disconnect the negative battery terminal. Use a wrench to loosen the retaining bolt and pull the cable off the battery. Set it aside, isolating it from the battery terminals.

Step 2

Raise the front end of your Dodge with a jack and support it on jack stands. Remove the splash shield from under the truck, removing the mounting bolts with a socket and ratchet. Lower the shield down and move it out of the way.

Step 3

Locate the oil pressure switch just above the oil filter, facing the front of the engine. Unplug the wiring harness connector from the switch. Release the locking tab and grasp the connector not the wires when removing it.

Step 4

Turn the switch counterclockwise with a wrench, removing it from the engine. Discard the old switch and install the new one in its place. Thread the new switch into the engine, then tighten it with the wrench.

Step 5

Push the wiring harness connector onto the top of the new switch. Press it down until the locking tab engages the switch. It will snap on when it locks.

Step 6

Replace the under-engine splash shield and install the retaining bolts. Tighten the bolts with a socket and ratchet.

Step 7

Raise the front of the truck with a jack and remove the jack stands. Lower the truck to the ground and remove the jack.

Step 8

Install the negative battery cable onto the battery terminal and tighten the retaining bolt with a wrench. Start the truck and verify that the pressure switch is working by checking the reading on the gauge in the cab.

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