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What causes oil pressure gauge to drop to zero and engine light to come on. GMC seirra 2009

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  • GMC Master
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No oil, insufficient oil, oil line fractured, oil pump no longer working. Sorry I could carry on but if it were me, I would investigate the pressure loss or is it a sensor ..... ???.

Posted on Feb 09, 2019

  • Evelyn Bourque
    Evelyn Bourque Feb 09, 2019

    I went about two weeks over my oil change and the guage pegged out random engine light came on. Changed the oil then and light went off and guage returned to normal. A week later the guage pegged out again then dropped to zero and remains there. The engine light is back on also. The engine does not run bad that I can tell. I haven't really gotten any further on this but being here.


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Well like they say it first thing I will do is check the oil make sure it's all the way to the top and if it's full check the oil pressure sensor by unplugging it in grounded plug see if it comes all the way up or if you unplug it see if the light goes off on the pressure goes off that's meaning the pressure sensor could be an open position is bad need replacing

Posted on Feb 09, 2019

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Does it show any pressure when its cold

Posted on Feb 09, 2019

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  • Evelyn Bourque
    Evelyn Bourque Feb 09, 2019

    The guage doesn't move when it's cold.

  • Rocky Ram
    Rocky Ram Feb 09, 2019

    Is a common issues with this truck...You may want to replace you oil pressure sensor and there is also a scree under the sensor...I would replace that to.

  • Rocky Ram
    Rocky Ram Feb 09, 2019

    check this out

  • Rocky Ram
    Rocky Ram Feb 09, 2019

    Some truck have a screen under the sending unit depending on the engine.


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Posted on Jan 02, 2017

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SOURCE: oil pressure gauge goes up when car started, but then down to 0

u Have a problem with the oil sending unit. The sensor is located beack right side of the engine block. Take out the switch and make sure u have good oil PSI. Should be 6 psi at idle and around 50 at 4000 RPM. If the presure is ok replace the switch they are very cheap about 20 bucks. Please rate.

Posted on Aug 12, 2009

  • 984 Answers

SOURCE: where is the oil pressure switch on a 2001 f150

Left ( driver's side ) front of the engine on the 5.4L engine.

This is shown to be at the end of the baffled area of the intake, the edge of the pleated area farthest from the airfilter ( looking at the engine, the left side of the pleated folds ).
When you locate this, look down the front of the engine.

The connector is a black 1 pin connector with a White w/ Red Stripe wire to it.

You might have to remove the factory air intake plastic housing to see it.

Posted on Nov 13, 2009

  • 1098 Answers


poor oil circulation may need either more oil or a new oil pump, any other symptoms?

It could just be the pressure sensor, as this is cheaper get it looked at first.

Hope this helps

Posted on Feb 01, 2010

  • 6982 Answers

SOURCE: Oil Pressure Gauge Drops to zero when Idle and

Low oil pressure can and will destroy your engine. Check the oil level. If it's full or just a little low (1quart or little lower) then you have a serious problem already. If it is lower than a quart and a half, re-fill it and check pressure. If it's OK, then find the leak and fix it. If after filling it pressure does not return to normal then you already have a serious problem. have the actual pressure checked with a mechanical gauge and proceed from there. (likely bad bearings) If main bearings are involved, unless you remove the engine and re-grind the crankshaft and clean out the oil passages, you are wasting your $. Usually cheaper to replace the engine and more reliable as well.

Posted on Feb 01, 2010

  • 4088 Answers

SOURCE: 2000 Ford F-150. The oil temp warning light came

Make sure the oil level is correct. If the engine bearings are getting worn, the oil pump is worn or it's screen plugged, that can cause low-RPM weak oil pressure. Try running with 'high mileage' oil at your next oil change and always replace the filter. At some point, you may need to consider overhauling or replacing the engine. Good luck!

Posted on Jun 06, 2010

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1 Answer

2004 gmc envoy. Oil gauge drops to zero when stopping. Car had been running for about 1hour in city traffic.

have the oil pressure checked using a mechanical pressure gauge
most likely a problem oil pressure sender unit or broken wire

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I have a 01dodge RAM 1500 and the oil gauge keeps going from 40 to 0 and the check gauges light keeps coming on but I checked the oil and it's fine, what could be the reason for this

1. You need to have an independent oil pressure gauge hooked up to the engine to check the oil pressures at various RPMs and to verify the 40 to zero drop. This will eliminate any issue with the pressure gauge or the sending unit.

2. The oil pressure variation can be caused by an intermittent blockage in the oil pick up or an intermittent sticking oil pressure relief valve. I would possibly suspect the latter if you are getting good pressure and it is intermittently dropping to zero and going back up again..
If you or previous owners have not maintained the engine with frequent oil changes you will get a sludge build up problem in the engine and this will be evident by just dropping the engine sump.

3. If you have had a check engine light warning then you need to have the vehicle scanned to see what fault codes have been generated by the computer. There will be some related to the intermittent loss of oil pressure but there may be others also..

4. You need to have the oil pressure problem checked out immediately. Running the engine when you constantly lose oil pressure intermittently will definitely cause engine damage due to a loss of both lubrication and oil cooling to critical components.

Apr 01, 2016 | Cars & Trucks

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I have a 1993 gmc seirra. It runs fine everything. But when you have to stop my oil gauge drops and it acts like it wants to die. Even worse when the head lights are on. Can someone please help. I'm...

I'm having the same problem at the shop I work for. So far I've changed the computer chip in it, throttle position sensor, and it seems to be doing better. Haven't found the real exact problem yet so if it fixes it let me know please. Chip is about $80 from Autozone and tps about $40 or $50.

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1 Answer

No oil pressure on my 2009 Yukon

You need to be careful here. If you are driving your Vehicle with ZERO PRESSURE, you are going to blow up your engine.

There is also one of 2 other scenero's for a GM Vehicle

FIRST: Instrument Cluster STEPPER MOTORS are KNOWN to be going BAD in GM's/. If the Stepper Motor is bad, make sure you replace it with a X27.168

SECOND. Your Sending Unit could have come unplugged or the Unit itself went bad.

I am Betting that your Stepper Motor went bad (Happens that Frequently).

I would put a Gauge on the Motor and see what the Oil Pressure Actually is, if it is Truly ZERO... do not start or Drive the vehicle and take it to a Good Mechanic or if still under warranty.. To the DEALER

Apr 08, 2013 | 2009 GMC Yukon XL

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Oil pressure low stop engine light and check gauges light

It could be your oil pressure sensor has gone bad.

Jan 10, 2013 | 2003 GMC Envoy

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My check gauges light is on, oil hands goes over to zero, moves up, light goes off, when it drops back to zero, gauge light comes back on.

Well the warning light is supposed to come on if any of the gauges display a dangerous condition, such as no oil pressure.
You may have a faulty sending unit for the gauge, or a wiring problem, or the engine may actually be loosing oil pressure when the gauge drops.
You could replace the sending unit as a test, or have someone check the oil pressure with a mechanical gauge.

Dec 13, 2012 | 2001 Jeep Grand Cherokee

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Oil pressure drops to zero when engine starts then goes to 60,while driving after warm,pressure drops down 4.3 V6 vortec engine

The 4.3 engine should have 20 to 30 psi at idle cold and around 50 to 60 psi running down the road. Has this engine had regular oil changes? If not the problem could be sludge build up. The oil pressure sending unit could be the problem. If in question about the sending unit install a mechanical gauge and watch the pressure.

Jan 02, 2011 | 1999 GMC Jimmy

1 Answer

2000 Ford F-150. The oil temp warning light came on and the oil pressure gauge dropped to zero. While accelerating, the pressure gauge goes back to normal and the warning light goes out. No drivability...

Make sure the oil level is correct. If the engine bearings are getting worn, the oil pump is worn or it's screen plugged, that can cause low-RPM weak oil pressure. Try running with 'high mileage' oil at your next oil change and always replace the filter. At some point, you may need to consider overhauling or replacing the engine. Good luck!

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