2004 Chrysler Sebring: Engine Runs Fine But Oil Light Stays ON?

Oil warning light comes up on dash.

In this case first confirm if oil is low or oil is not changed from long time.If oil is very old replace it with new/.f its low, then add new fresh oil.Drain old oil.

If oil filter is very old and clogged,replace it with new,

But if you have already tested this basics and replace oil and oil filter.

Then notice what problem is noticed while driving.

If there is no noise and engine runs fine.
Then more troubleshooting is required.
Read as follows :----------


As long as you are not hearing any unusual engine noises like knocking or tapping when the Oil Light is on, then most commonly this is a problem with the Oil Pressure Sensor. This problem is noticed many a times,Over time, the internal resistance of the sensor tends to wear out, and it has a hard time reading the correct oil pressure at an idle. Inspect the electrical connector and make sure there are no loose or oil soaked wires. If the visual inspection checks ok, replace the sensor.

There is also a Technical Service Bulletin on this issue that states to better protect against the sensor failing in the future, a wire terminal/vent,As per your car model year the Part number  :-----
 05017800AA, in place of the removed sealing dart, should also be installed.


See below the diagram showing Sensor Location Part:-----


This details will help.
Thanks.

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Oldsmobile Engine Oil Pressure Warning Indicator Switch?

Engine Oil Pressure Warning Indicator Switch
TESTING
REMOVAL & INSTALLATION

The oil pressure warning indicator switch (also called a sender unit) receives battery voltage with the ignition switch in the RUN, BULB TEST or START position. The instrument cluster will turn the indicator ON during engine startup for a bulb check. The indicator is grounded by the fuel pump/oil pressure switch with a low oil pressure condition.

TESTING

"OIL" Pressure Indicator Stays ON, With Engine Running and Normal Oil Pressure

1. Disconnect the fuel pump/engine oil pressure indicator switch at the engine.
2. With the ignition switch in the ON position, and with the engine running, is the "OIL" indicator ON-
   1. If not, replace the indicator switch.
   2. If the "OIL" indicator is still ON, check the circuit for a short to ground somewhere between the instrument cluster connection and the oil pressure switch terminal A. If okay, the instrument cluster may need to be serviced.

"OIL" Pressure Indicator Not ON, With Ignition in ON Position, Engine Not Running

1. Disconnect the fuel pump/engine oil pressure indicator switch.
2. Connect a fused (3 Amp) jumper between terminal A (tan wire) and ground. With the ignition switch in the ON position, is the "OIL" indicator ON-
3. If yes, check for a poor connection at the switch terminal. If okay, replace the switch.
4. If no, look for an open between the instrument cluster connection and the oil pressure switch terminal. If okay, the instrument cluster may need to be serviced.

REMOVAL & INSTALLATION

Fig. This oil pressure warning switch is located on the side of the engine block, near the oil filter-3.1L engine shown, 3.4L (VIN X) engine similar

Fig. This oil pressure warning switch is located on the oil filter adapter assembly-3.8L engine

Fig. Oil pressure warning switch location-3.4L (VIN E) engine

Fig. Location of the oil pressure warning switch location-3.5L (VIN H) engine

1. Raise and safely support the vehicle.
2. Drain the engine oil into a suitable container.
3. Unplug the electrical connector from the oil pressure warning switch.
4. Unthread and remove the switch.

To install:

5. Install the oil pressure warning switch and tighten securely.
6. Plug in the electrical connector.
7. Lower the vehicle.
8. Add the proper type and amount of engine oil.

This details will help.

Thanks.