My Oil pressure drops below 30 when waiting for a light where is the oil pressure sensore located on a 1996 s10 2.2 pickup
How much below 30 is it dropping? Oil pressure when in DRIVE at idle on a hot engine, is NORMAL at around 18 to 20 Psi. The warning lamp does not come on until around 7 Psi.
With that said, the oil pressure switch (for the light) is located on the lower left front of the engine. The fuel pump oil pressure switch and sender (for the gauge and fuel pump operation) is on the lower right front of the engine.
SOURCE: where is the bank 2 sensor 1 located.
Oxygen sensors are always numbered like this:
Bank 1 sensor 1
Bank 2 sensor 1
Bank 1 sensor 2
Bank 2 sensor 2
some manufacturers use a kind of shorthand that reads different, but means the same thing:
Sensor 1/1 or O2s 1/1
Sensor 2/1 or O2s 2/1
Sensor 1/2 or O2s 1/2
Sensor 2/2 or O2s 2/2
Bank 1 is always the side of the engine where cylinder number 1 is located and, of coarse, Bank 2 is the opposite side.
On a 4 cylinder engine, there is only 1 bank and it is always referred to as Bank 1.
Sensor 1 is always the upstream sensor (The one located BEFORE the catalytic converter)
Sensor 2 is always the downstream sensor (the one that is located AFTER the catalytic converter.
Most GM engines have #1 cylinder located on the left bank, (or Driver's Side) of the engine,
So, the answer to your question would be that you are looking for the sensor located before the catalytic converter on the right (or Passenger Side) of the truck.
SOURCE: Oil pressure sensor light comes on and oil level is fine
This is probably an oil pressure sensor problem. Randomly going from 0 to over 130 is means the sensor is putting out out of range signals. Mine would even read --- at times. I told the mechanic to not spend any time troubleshooting just change the sensor. $121 including parts, labor and tax. The gage should read about 70 psi plus or minus several psi, and move up a PSI or two as you rev up the engine. It took him about 10 minutes to change it, once he got the part. There would have been a diagnostic charge of about $50, had I not been sure.
SOURCE: Dodge 2.7 I'm losing oil
The first stop is to measure the pressure with an external gauge. if the readings are the same, surgery is needed, I would look at the oil pressure relief valve for foreign particles.
It takes resistance to make pressure, and your decsription does not sound good. If the pressure is actually dropping, and you find no issues with the oil pump and pick up, you need to measure bearing clearances... Essentially, everywhere oil is pumped needs to be inspected...
SOURCE: In my 02' Trailblazer oil pressure gauge goes below 0
I have this same problem with my 2002 trailblazer; however, I goofed up and had a mechanic look at it, since I was perplexed as to what was going on with it. He told me the oil pump needed replacing and it ended up costing me around a $950. Needless to say, it still happens. A grand down the drain - it wasn't the oil pump. The oil level is always good. This generally occurs when I've run the vehicle for a while and then come to a stop. It occurs quite often during the spring/summer and doesn't happen all that much during colder months.
SOURCE: 1996 oldsmobile aurora oil pressure
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.
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