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Engine oil pressure switch is faulty

 
Old 04-29-2019, 11:35 PM
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Engine oil pressure switch is faulty

So short story 2010 TL SH-AWD with 123k. Car has been dealership maintained all of its life. Fully xynthetic oil changed every 5k. Mostly hwy miles. I have noticed it eats 1/2 a qt of oil (valvoline) every 3k miles so usually I drop in a 1/2 a qt at that point and run to 5k then change it all.

Today I am right at about 3k, I am driving and coming up to a stop light. I am slowing down and all of a sudden I get a low oil level light and then it goes off when I come to a stop. It never came on again the next 15 or so minutes the rest of the way home. I pop the hood when I get home and check the oil level. Its right at about the bottom of the cross hatches as usual at 3k, I drop in another 1/2 qt and I am right back to mid hatches on the dip stick. I normally see it get this low and oil light has never come on. Remember it was at minimum oil level per the dip stick, not below.

I am trying to figure out what caused the low level message and am wondering if that warning is based on oil shifiting to the front of the pan while braking, or if that light is based on oil pressure and I have a bigger issue lurking. I suppose the start of the answer comes down to if the car has both an oil level sensor and an oil pressure sensor, or just an oil pressure sensor. Again while oil level was down it was still in the hatch marks. I have never got an oil light at that level

Thoughts?
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Old 04-29-2019, 11:56 PM
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I had the same issue where it would light up while coming to a stop but go away afterwards. Oil level was fine too. In the end, the issue went away by itself.
I believe this TSB may be related. Looks like there is only a pressure switch: https://www.autoserviceprofessional....a-oil-pressure
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Old 04-30-2019, 06:35 AM
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See TSB 09-012 - MID or Navi Shows a Check Engine Oil Level Message, Low Oil Pressure Indicator May Be On in the 2009, 2010, and 2011 TSB threads.

https://acurazine.com/forums/fourth-...inside-945434/
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Old 04-30-2019, 02:22 PM
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About 2 years ago, I was getting the same "Low Oil" message. The oil level was fine. Turned out to be the Oil Pressure sensor. Had it replaced and haven' seen the message since.
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Old 05-02-2019, 11:09 PM
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Same issue here. 2012 3.7 at 100k the sensor went bad, replaced and haven't seen it since.
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