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Oil pressure indicator going low to hight intermittent.full oil H2 2003?

The intemitent gage star went are over 1500 revolution

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  • Cars & Trucks Expert
  • 161 Answers

Replace the oil sensor. I've also seen this happen when someone puts in custom stereo equipment and draws power off the oil gauge in the dash. See if it happens with the stereo off.

Posted on Nov 27, 2014

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6ya6ya
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Posted on Jan 02, 2017

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leetamara
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SOURCE: 1989 Ford Mustang GT Drop in Oil Pressure gage

I hate be the bearer of bad news but it sounds like you bottom end bearings are getting worn out. You have excessive bearing clearances causing your drop in oil pressure.

Posted on Jul 13, 2008

short shadey
  • 421 Answers

SOURCE: 6 Cyl 1998 Toyota Camry Oil Pressure Light

these cars have problems with bad oil pressure warning switches you may have someone put an oil pressure gauge on the car and make sure your pressure is within spec and go ahead and change the sender if it checks out please rate -jeff

Posted on Sep 01, 2008

  • 2 Answers

SOURCE: Oil Light

I had the same issue. On the back of the engine (behind steering column) you'll see a pressure sensor with a wire going to it...check your connection. If that doesn't work, then your pressure sensor is probably at the end of it's road. You can get a new one for about 15 bucks at any parts store...hope this helps

Posted on Nov 19, 2008

  • 193 Answers

SOURCE: Low Oil Pressure and rough idle

Please understand, all I can offer you are suggestions, since I don't have access to hands on testing. You might first change oil and filter.
If going by the oil pressure guage, low oil pressure can mean worn crankshaft bearings, as the clearance between bearings and crankshaft is what determines oil pressure.
Of course a worn oil pump can cause the same problem.
You might want to connect an external oil pressure guage to the engine to verify the pressure reading.

The rough running at this point would be hard to pin poit.
Because I do not know the extent of the rust, I can suggest that you consider having it undercoated.

Again, I can only make suggestion because you need an absoluate diagnosis.
jetski

Posted on Nov 27, 2008

localwonder
  • 6784 Answers

SOURCE: low oil pressure, stop car on 2001 cadillac seville

HI. this could be a faulty sensor or a bad oil pump screen as well. the oil pump malfunction is the worst scenario in this case. You can actually test the sensor with a voltage needle to see if its getting the proper voltage. i would inspect the wires that are attached to the sensor as well. if the wires are good and the current level is ok as well, it will most likely be a faulty oil pump or bad oil pump screen as well.

In this case, i would recommend inspecting the oil pump assembly. here is a inspection guide below that will help you confirm oil pump failure.

--OIL PUMP INSPECTION GUIDE--

  1. Clean the oil pump components with non-corrosive solvent.
  2. Dry the oil pump components with compressed air.
  3. Inspect the housing and the cover for cracks, scoring, casting imperfections and damaged threads.
  4. Inspect the gerotor gears for chipping, galling or wear.
  5. Inspect the pressure relief valve for embedded particles and/or damage.

The internal parts of the oil pump are not serviced separately. If wear or damage is noted, replace the entire pump assembly.

Please rate and have a great day:)


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Posted on Apr 24, 2009

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1 Answer

Is there a fuse that works the oil pressure gauge and the battery gauge for a 2005 chevy trailblazer


NO , there is not a fuse just for those two thing's ! There are two power supply's for the whole insturment cluster . You could need a new cluster or the ECM isn't sending this info. to the cluster . Could have DTC'S - diagnostic trouble codes stored in the PCM or the insturment cluster . Without knowing how this works (insturment cluster gets it's info.) Your best bet , take it to a qualified repair shop that has the knowledge and test equipment to diagnose this problem.
Engine Oil Pressure Gage
The instrument panel cluster (IPC) displays the engine oil pressure as determined by the engine control module (ECM). The IPC receives a serial data message from the ECM indicating the engine oil pressure. The engine oil pressure gage defaults to 0 psi (0 kPa) or below if:
• The ECM detects a malfunction in the engine oil pressure sensor circuit.
• The IPC detects a loss of serial data communications with the ECM.
For the 4.2L LL8, the ECM uses an engine oil switch that is open when the oil pressure is normal and closed when the oil pressure is low. At normal pressure, the engine oil pressure gage will display 275 kPa (40 psi). At low pressure, the gage will go to 0 kPa and the low pressure warning will be displayed in the driver information center (DIC). At high pressure, the gage will display 551 kPa (80 psi). Any values between these three values are calculated values determined by the ECM.

Voltmeter
The instrument panel cluster (IPC) displays the vehicle voltage based on the information from the body control module (BCM). The IPC uses the serial data information from the BCM to provide a voltage level indication on the voltmeter.

DTC P0521: Engine Oil Pressure (EOP) Sensor Performance

DTC P0522 Engine Oil Pressure (EOP) Sensor Circuit Low Voltage
DTC P0523 Engine Oil Pressure (EOP) Sensor Circuit High Voltage

Volt Gage Inaccurate or Inoperative
2
Install a scan tool.
Turn the ignition ON, with the engine OFF.
With the scan tool, perform the instrument panel cluster (IPC) gauges output control.
Does the volt gauge move up and down when commanded?

Aug 12, 2017 | Cars & Trucks

1 Answer

How do I check and replace engine oil sensor.


Knowing how these gauges work , I'd say you have an instrument cluster problem not oil sender unit. 2003 - 2006 GM had bad stepper motors in the instrument cluster . If there was a problem with the oil sender the gauge would default to zero .
Engine Oil Pressure Gage
The instrument panel cluster (IPC) displays the engine oil pressure as determined by the powertrain control module (PCM). The IPC receives a class 2 message from the PCM indicating the engine oil pressure. The engine oil pressure gage defaults to 0 kPa (0 psi) or below if:
?€¢
The PCM detects a malfunction in the engine oil pressure sensor circuit.

?€¢
The IPC detects a loss of class 2 communications with the PCM.

If you don't know what class 2 serial data communications are ,google it. How to repair GM Instrument Cluster Speedometer Gauge Stepper

Dec 23, 2015 | 2003 Chevrolet Silverado 1500

1 Answer

I have a 02 dodge ram 1500 that have a rebuilt engine that the check gages comes on and oil pressure was low at a zero then accelerate the pressure went up to 40 then light goes off and checked oil level...


If you paid someone to rebuild the engine, you need to go back for warranty work. If you did the work, you need to put on mechanical gauge, and find out if the pressures is low or if your sending unit is not accurate.

Jul 09, 2014 | 1999 Jeep Grand Cherokee

1 Answer

Oil pressure low indicator no pressure on instrument read. full of oil , no engine light H2 2003 ?


Either you have a bad oil pump, or your oil sending unit is bad. You can easily find either at your corner auto parts store. (Autozone, Advanced Autoparts, Napa, Etc.)

Mar 23, 2013 | Hummer H2 Cars & Trucks

1 Answer

I have a 04 dodge ram 1500 im trying to find out whats wrong with the oil pressure is aways low but the check gages does not come on


Measure your oil pressure with an external gauge. The transducer (sending unit) has high failure rate, you may not actually be running low pressure.....

Jul 19, 2011 | 2004 Dodge Ram 1500

1 Answer

Where is it located and what does the oil sending unit do?


Your oil sending unit is located somewhre on the engine. It will be round and about 1 to 1.5 inch across. It will have a wire attached to the top of it. I dont know the specific location on your particular car.

What does it do? It is a diaphram operated device that sends a signal to your oil gage or warning light. The engine side is exposed to oil pressure in the engine. The oil presses against the diaphram. The diaphram is attached to a variable resistor device that operates the gage. Low pressure on the diaphram -= low signal to the gage; Hight pressure on the diaphram = high signal to the gage.

Does this answer your question?

Thank you for your interest in FixYa.com

Mar 23, 2011 | 2006 Pontiac Grand Prix

1 Answer

The "Check Gages" light comes on all the time now.


The "check gages" light comes on in response to the oil pressure (not oil level) gage dropping too low. Step one is to check to make sure the engine has oil pressure. Use a mechanical gage inserted directly into the engine when the oil pressure sensor screws in. If the pressure is good, you need to check the gage. Your dealer has a tool that attaches to the connector from the pressure switch that gose to the gage. He can then test the gage, cluster and circuit wiring. If that is ok the culprit is the oil pressure sensor itself. I normally don't recommend replacing parts without a proper diagnosis but an oil pressure switch is relatively inexpensive. You might want to try that first. It's relatively common anf if that's the culprit, you will save a bunch of $$$ no having to go to your dealer. If you still have a problem, you have at least eliminated one item and are only out a couple of bucks.

Nov 22, 2010 | 2000 Dodge Durango

2 Answers

LOW OIL PRESSURE ON 2007 GMC SIERRA 1500. CHANGED


have it tested using a manual gage if still low then main baring ore most likely bad that would mean a over hall if is really low and bearings bad should be making rattle noise when started up first few seconds

Mar 11, 2010 | GMC Sierra 1500 Cars & Trucks

1 Answer

Check gages light came on then the oil gauge went from mid-way to below the low mark. truck started knocking...what casued this?


More then likely defective oil pump lost oil pressure, which in return damage your piston rod bearing. Overhaul or replace engine.Sorry.

Jan 16, 2010 | 2004 Dodge Ram 1500

1 Answer

What is the check gauges light


CHECK GAGES light (1) indicates a potential engine failure(low oil pressure, low coolant, coolant overheating) has occurred.
· Check gages and shut down engine. Gages should read as follows: Oil pressure 5 to 10 psi (34 to 69 kPa) at idle; Water Temp gage below 230 degrees (110 C).
· Check engine oil level (Para 2-11) if OIL PRESS gage indicates low reading. Check coolant level (Para 2-11) if Water Temp gage indicates high reading. Notify Unit Maintenance if levels are low.

If CHECK ENGINE light (2) is on, check engine oil pressure gage (3) and water temperature gage (4). If both indicate normal, proceed with mission and then notify Unit Maintenance. If either one does not indicate normal, stop engine immediately and notify Unit Maintenance


Oct 16, 2009 | 1999 GMC Jimmy

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