Question about Oldsmobile Aurora

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1996 oldsmobile aurora oil pressure sensor says low oil pressure my mechanic checked it out and replaced the oil pressure sensor and problem still exsists he tested the oil pressure recommended 20 PSI when engine is hot and idling drops to 16-18. Already tried switching to synthetic oil did nothing. please help

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  • ph204 Jan 18, 2009

    i have similar problem with 3.8 pontiac only pressure is at 0 at idle

  • Anonymous Mar 18, 2009

    Same the oil psi drops changed the sensor some better still drop to 9-11 psi put the engine doesn't knock and the oil still shoots up the stick

  • cctcct67 Apr 14, 2009

    i have this problem with a 96 auroa also when parked ible drops to 6psi but no nock noises or anything



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The Aurora is a low pressure oil system. The only solution available at this time is to increase the oil weight. I went o straight 30W to solve the idle alarm issue. Some use 20W oil and that works too.
With 20W you will be at 80 to 90psi cold then drop to 20-30psi hot.
I first replaced the oil pressure gauge and it was worse. I put the original back in and it was better. Then went to 30W and all is fine.
Running it that way for a few years now.

Posted on Apr 03, 2010

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Oil level system


It may seem obvious but do not operate the engine with it overheating as this can lead to more trouble including a cracked engine block.

Low engine oil pressure is a problem because if it exists, the critical engine parts may not get lubricated properly and may fail. Since you have ruled out external leaks, here are some possibilities:

Clogged oil filter or obstruction in the system

Loose wire or faulty oil pressure or oil level sending switch/sensor.

Possible blown head gasket. This is a serious problem that might be accompanied by white or blue exhaust smoke and a burnt coolant or oil odor. Check for oil contamination with coolant. The dipstick may show a brown milky film/sludge or smell like burnt coolant indicating contamination.

Engine oil pump is possibly bad. This is a serious problem. It's usually time to swap out or rebuild the engine, particularly if it has many miles.

Possible but unlikely in this case is a problem with PCU (Power Control Unit) that runs the Information Center. PCU problems are often indicated by getting other unrelated errors on the info display or "DATE NOT AVAILABLE" for extended periods when you start the car.

You did not mention the Check Engine/Service Engine Soon light being on, but if so I would get the trouble codes read at the OBD II connector. The codes might indicate a sensor problem. Some auto stores do this for free. Either way, I would assume the worse case scenario (bad oil pump) and address it immediately. Unfortunately, due to the complex nature of the car, most things are not easy to diagnose and repair by the do-it-yourselfer. Hopefully though it is just a sensor but with a temperature rise, I would be careful.

Best of Luck!

SC442299

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