Oil pressure sensor, or most likely, oil level sensor, either sensors, wires, or connections.
The oil light comes on when the oil pressure sensor detects low oil pressure. The amount of oil has little to with it, although very low oil levels can cause loss of oil pressure. The best thing to do is to have the engine's oil pressure checked with a mechanical oil pressure gauge to ensure that the oil pressure is sufficient at all operating speed and temperatures. If the oil light is still flashing on and off and there is no indication of low oil pressure by the gauge, then replacement of the oil pressure sensor is recommended.
SOURCE: 2002 Chrysler Sebring Oil pressure light
Could be a bad oil pressure switch, or a bad oil pump. Both will cause this issue. Hope it is the switch b/c the oil pump is a costly repair.
SOURCE: 2007 mitsubishi eclipse oil light flickers at stop
Sounds like a problem with a weak sensor and the computer. You need to get your mechanic to code the car as to rule out any problems with the computer or the sensors. Your car is about the right year for those sensors to start getting weak. When the computer reads those sensors that then sets things. So if the sensor is getting weak, it would not be reading things right so your car would be not running so good. I would be looking at the Throttle Position Sensor. If after coding the car and nothing show up there. I would be checking for a vacuum leak they will often cause this problem. And one more thing when is the last time you did a good tune up on the car? Stark plugs, wires, distributor cap and rotor? Air filter might be something to look into too. I hope this helps and good luck!
SOURCE: The oil light in my 2003 Neon keeps coming on.
it is most definitely the oil pressure sender!
standing in front of your car, look behind your engine from above, below the head and screwed into the block on the right side is the sensor.
SOURCE: Oil level low light comes on. When I turn
some cars with oil level warning light on, it doesn't mean that its only reading the engine oil level is low, sometime the transmission fuid too. Did you check your transmission fluid if it is ok or not? try to check and let us know, ok.
SOURCE: engine oil light comes on at idle, oil level ok
Increasing the weight of the oil by a shade will get rid of the problem, and adding a high-zinc motor oil will eliminate any possibility of sludge in the pan (with proper oil changes). However, as mentioned before, it is a band-aid fix. It will work indefinitely, if you are diligent with changing your oil every 3000 miles. Use 3.8 quarts of Rotella T 15w-40, add one quart of Lucas oil stabilizer, and use a WIX filter with an anti-drainback valve (which isn't really necessary since the filter hangs upside-down on a 2.7, but it's a good habit to use one on everything you drive). Do not use a Fram filter, Valvoline oil, or STP... or anything else. The three I mentioned above are the only ones to use, and DO NOT USE SYNTHETIC OIL/ADDITIVES. I bought a 2004 Intrepid for the whopping sum of $250 that had the oil light/idle/low RPM issue because the owner was told by Sternberg Chrysler Center in Jasper, Indiana that the engine was going to grenade in short order. He wasn't going to pay them in excess of $2000 to replace the engine. I've put tons of miles on it since, and absolutely NO sign of the light, even now with the 2/1 Oxygen Sensor bad (which lowers the idle down to 600 instead of 750-800 where it should be). I'd trust the car cross-country. It's an expensive oil change at around $40 instead of $20 with cheap components, but what's saving your engine worth to you? A heck of a lot, I'd hope!
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