HOW TO TEST AN OIL PRESSURE SWITCH. Everything You Need To Know. 

Thanks Keith! Glad it was helpful)

Glad it was helpful Chris!

You're very welcome Richard! I'm glad it helped you a bit. Cheers)

You are most welcome! Thanks for your feedback.

Hi Larry! Glad to hear that! Thank you.

My Pleasure Jubs!

You're so welcome Francisco! I am glad it helped you out)

You're most welcome Enes!

Hi JL T, FCT aka Fuel control actuators is electronically controlled solenoid valve controlled by ECM. Valve regulates entering fuel pressure at the high pressure side of the pump. I don't know much about them but solenoids intend to fail way more often than super simple old school membrane oil pressure switches. Plus it could be the manufacture poor design or low quality components used for the solenoid, like wire coils, seal, actuators ect. I don't know if it helped you much. Thanks for watching and subscribing to our channel. Cheers)

@@PistonShack ,by FCA he was refering to fiat chrysler products

@@DericCribbs Ironically Bosch calls Fuel Control Actuators FCAs and yeah Jeep is made by Fiat Chrysler Automobiles. Wacky world

Hey Argjent! Ground the switch, means Turn it ON or OFF, depends from the circuit design. I would check actual oil pressure then test the sensor. Seems like you have poorly rebuild engine, main bearings gaps out of specs probably but check oil pressure at idle and 1500-2500 rpm. Cheers!

Hi Shadd, it depends where is oil sensor located. I would say if you can do it yourself. Ir could be the wiring issue down to the sensor, sensor failure or low engine oil pressure. Before replacing the sensor check engine oi pressure with a gauge. Let me know how everything is going!

Check for continuity when pressure is not applied. If you have continuity it means switch is Normally Closed Design. Thanks for subscribing.

@@PistonShack Thanks!

You are very welcome Kelly. Let me know if you have any other questions. Cheers!

I'm not sure...

Du bist herzlich Willkommen. Vielen Dank fürs Zuschauen und Abonnieren. Prost!

Welcome!

Hi Gator! Ford oil switch should be normally closed type. But you can easily check it out. Unplug the connector from the sensor. Set multi-meter to Omhs. Place positive probe to the connector negative against the switch body. With engine off, switch contacts should be closed, multi-miter should read "zero"

@@PistonShack Driving home looked and saw oil light was on in my 01 Merc Grand Marquis and starting to rattle under passenger side valve cover. Sat a couple weeks and woke up one night to feel the need to change oil sensor,It read open w no resistance as did the new one but after R and Ring it w a little oil leaking out,I put the old one back in til I could get a new one.Started the car and light stayed out for a couple minutes and came back on. I got the new one and after R and Ring it the light stayed out again a couple minutes but then back on. So I Seafoamed the interior of motor ,flushing it as the oil hadn't been changed in forever.Now the oil light stays off the most part but I need to wait til I get more mone for cab to buy another filter and oil. The wife is sick(lung cancer) she don't even smoke but shes 3 years past her expire date. Any who,been a great car w ice cold air and we're on retirement disability (I lost my legs in '93 in Bosnia)and buying a new one or good used car is out of the question. Any other Idea you have would be appreciated but this is like an engine flush I guess but instead of Marvel Mystery I used Seafoam ,it was on sale and thought I'd try it.Be about $25 for more oil and filter.I don't like Fram as I heard they come apart. Thanks

Hi Davib. Yes, absolutely! You can buy aftermarket oil pressure gauge kit and install on your vehicle using with you factory oil alert indicator. You need to connect the signal wire to the sending unit and to the gauge itself in basic words explained. What vehicle do you have, bzw? Let me know how everything is going! Cheers)

No. These are open or closed switches in this video, and there is no linear output to drive a gauge [or computer input] with. A proper sending unit may be two or three wire, not one. Two wire is generally not seen in automotive, but marine - as a 4-20mA signal for engine monitoring. In the case of this switch being tested, I would plumb to a regulated air line to see what the actual pressure switching point is - an "idiot" light design may be anywhere from 4 to 15 psi on proper setpoint, depending on vehicle and contact opens on rising pressure to remove return path for the indicator light. Conversely, a safety shutdown [usually tied into a relay somewhere] is going to open on falling pressure [15psi is a pretty good generic number, but will vary between engines - some need higher setpoints, some can get away with lower]. I am not a fan of 4psi designs - I want an indicator on at a bare minimum of 10psi. 4psi usually means my engine has already died and is spinning down and... I need a light for that? No, I don't think so.

No this swich is not sensor for gauge.

Thanks for the update and the way you explain things thanks once again for the efforts and for sharing this with us appreciation. Is just what I need .I was deeging every where and no gave a good explanation like you. I had one on my volvo 240 with b20 engine the one with normal open.when I started the engine sayes almost 0 and when I shut down the engine reeds 100.please can you help me with that👍🇩🇰🙏

Hi Aakash. What year is your Honda Civic? I need to pull the wiring diagram to check load and control of the circuit. Thanks.

@@PistonShack Hii, thanks for your reply, mine is a 4 door 1.8 AT 2008 Honda Civic in India.

@@PistonShack Also, the fuse location is Fuse 15 under the hood and manual shows it as igps oil level.

@@PistonShack Hi buddy, any luck on finding the diagram? Waiting for your reply!

@@aakudev Hi Aakash, Can you get simple test light to do testing. Common problem with fuse box is water intrusion as result rust and corrosion inside the fuse box terminals. Check if you have power at the back of the fuse pins. Check wiring for opens or shorts at the points where wire can rub against metal. I could not find free wiring diagram for your car.

Hi, Ronnie. Technically, yes. Oil pressure switch failure could lead to potential catastrophic engine failure if oil pressure dropped below 5 psi. Reasons you mention could be one of them. I use Teflon tape to seal switch threats to prevent any leaks. Cheers.

It's truly horrifying knowing that your oil pressure sensor could blow a seal, leak oil and give no warning while on a long highway trip and eventually blow your motor. Is there no fail safe to prevent this from happening?

ECU test oil pressure switch every time you start the car. Low oil indicator should come on for a second then turn off. If light doesn't light up indicates issue with switch, bulb or circuit.

Thanks you, brotha!

Hello every one. Kholer diesel generato 1040 kva oli pressure shutdown , what is the problem ? Thanks

@@NawazKhan-ny1fz It means low oil pressure switch turned engine off to prevent serious engine damage. Test the switch first. Check the engine oil level when engine is cold. Look for the potential cause of the low oil pressure as worn oil pump, no oil flow from the sump to the pump, clogged oil filter, worn engine parts due to the large parts clearances ect.. Let me know what do you found. Thanks for your interest to our channel! Cheers.

@@PistonShack Thanks dear

@@NawazKhan-ny1fz Awesome, Nawaz Khan. I'm glad my video helped you. Thanks for your to my small RU-vid channel project.

Hi Articolo! What specific parameters are you interesting. Can you list them down below, thanks.

You are very welcome! Tnx for watching!

Hi Meteot! You can easily check it out. Unplug the connector from the sensor. Set multi-meter to Omhs. Place positive probe to the connector negative against the switch body. With engine off, switch contacts should be closed, multi-miter should read "zero"

Yes, you are right! This is just pressure switch.

Oh, yeah. You can test when sensor is in the vehicle if you can get to it. Cheers!

@@PistonShack, thank you. I found out how difficult it was to get to in general. Thank you again.

@@sandracox4341 You are very welcome Sandra!

Well, I'm not sure. Good question. If the work prilcep of the sensor the same, I think so.

PistonShack hi.. Thanks for the reply.. I saw a project online where someone incorporated both oil pressure switch and water temperature switch and a sensor with an alarm to sound failures for the temperature and pressure... I want to try it but i dont know which kind of switches would work

@@hashimhassan1191 That's interesting!

@@PistonShack hi...thank u..i humbly request for your help...so i have obtained all the components but i dont have an engine to test the device...for water temperature sender,i can just use mayb hot water thats about 90 degrees to sound the alarm...but for oil pressure sender,i dont know what to use to reach low pressure to test the sender...any idea on what i can use to test its functionality? Looking forwardto your fast reply,thanks in advance

No, es necesario tener una presión de aceite real para obtener la lubricación adecuada de las piezas. La bomba de aceite mueve el volumen de aceite, pero la presión creada por los espacios estrechos entre las piezas. Si el motor está desgastado, no necesitará presión de aceite. ¿Cuáles son sus lecturas de presión de aceite en ralentí y 2000 rpm con el motor completamente calentado? ¡Gracias!

Oil light should turn off after oil pressure build up after 2-3 seconds. Check wiring and connector down to the oil switch it could be an issue. I would also check actual engine oil pressure by using manual gauge.

That's correct Rob! Thanks for your feedback.

You right, because test with be the same just operating principal is different. That's good point, bzw!

Hi, most of the oil pressure switches are normally closed. Normally open ones used on Renault, Citroen and some other old made vehicles. Nowadays, most of the vehicles have normally close oil pressure switch. Cheers.

Oh, that's so funny! I like it) Cheers!

English make no sense.

@@PistonShack My wife's diaphragm fell out. We had 3 kids and no rearing diagram. Shoulda never dropped her diaphragm. Did you hear about the newlywed couple that didn't know the difference between window putty and vasoline? Their windows fell out.

Hey William, probably this only one Google had to offer to you. 3 wires design is not widely common. You have Ground, Sensor signal ans 5V reference voltage. Checks pretty simple: check sensor ground to battery ground, should be around "0" mV. Check 5 v reference voltage. Then supply power to the sensor to check diaphragm.

@@PistonShack THANKS VERY MUCH! That gives me something to go on!

@@Bleriotman Oh, no worries. Let me know if you have any questions.

Hi Jet, that's very good point. I forgot to mention in the video. Normally low oil pressure switch turns on at 15-20 psi or low. I set my compressor outlet pressure for the test at 20 psi. Thanks for bringing it up. Cheers.

I actually did my own test on a new bwd. brand oil pressure switch and found that it closes at approximately 1.8 PSI ( turns the light on) and opens at approximately 2 PSI ( light goes off)

@@jet6374 that is such a low pressure at 5 psi engine will experience serious oil starvation. Not even talking about 2 psi.

@@PistonShack I didn't design the switch, I just tested it with a regulator that had a 15 psi gauge with 1psi graduations. Nowhere near 20 psi. They usually switch at very low to no oil pressure.

@@jet6374 Sounds like the at was the bar measurement.

Thanks for your feedback!