How to Test the Oil Pressure Sensor on a Chevy 4.3L Engine

by Kyle SanstromUpdated July 30, 2023

Locate the oil pressure sensor. It is on the right side of the engine, just below the intake manifold. It is approximately 3-inches long and is made from black plastic. A two-wire electrical connector is attached to the end of the sensor.

Clean any residual oil off of the sensor and start the engine. Watch the sensor to see if any oil leaks out. If oil seeps out of the sensor at any point, then the sensor is faulty.

Turn off the engine and disconnect the oil pressure sensor's electrical connector and remove the sensor from the engine using a 1-inch box-end wrench. Install an oil pressure gauge into the oil pressure sensor hole on the engine block.

Start the engine and watch the gauge. It should read at least 6 psi at 1000 rpm. If the oil pressure meets or exceeds this specification but the oil pressure light is on, then the sensor is faulty and must be replaced.

More Articles

article divider