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Oil pressure gage reading 80 psi - 2006 Chevrolet Express

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On GM cars and trucks this is a common problem and is caused by a defective oil pressure sending unit. To replace the sending unit remove the engine dog house cover in the passenger compartment, the oil pressure sending unit is at the back top of the engine

Posted on Mar 27, 2011

  • larro44 Mar 27, 2011

    Thank you

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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

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Volt Gage Inaccurate or Inoperative
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Install a scan tool.
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Does the volt gauge move up and down when commanded?

Aug 12, 2017 | Cars & Trucks

1 Answer

If my oil sending unit is out will my truck break down


yes,it reads oil pressure only,if its out as long as it was working fine before it went bye bye your fine,you won't blow up engine or break down.

Nov 28, 2012 | Cars & Trucks

1 Answer

Oil pressure gauge is reading 80 psi. I had the


The oil sending unit is located on the engine block behind the drivers cylinder head area.You have to climb up on the motor to see it cause it is hard to see behind the wiring harness.You may also want to purchase a new sending unit because it is very long and you might need to buy the sending unit socket to replace it.Hope this helps.Good luck.

Jul 20, 2010 | 2003 Chevrolet Silverado 1500

1 Answer

Why is oil gage reading 60? does this mean I need oil?


CHECK OIL PRESSURE FIRST.DEPENDS ON THE ENGINES SIZE JEEP OIL PRESSURE RANGES FROM 25 PSI TO 37 PSI.IF PRESSURE CHECKS OUT GOOD GAUGE COULD BE FAULTY.IF OIL PRESSURE IS STILL TOO HIGH.YOUR OIL TOO THICK.OIL RETURN HOLE STOPPED UP.OIL PUMP PRESSURE REGULATOR STUCK CLOSED.

Apr 11, 2010 | 2000 Jeep Grand Cherokee

1 Answer

The oil presure gage goes up and down from zero to


All you have to do is replace your oil pressure sending unit.It`s in the rear of the motor by the left head.This is the drivers side.You need a special socket to remove the sending unit.Good luck.

Dec 05, 2009 | 2003 Chevrolet Silverado 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

1 Answer

Oil pressure gage pegs 80 psi


Likely your oil pressure sending unit has failed or the wire has grounded.

Mar 28, 2009 | 2000 Jeep Grand Cherokee

1 Answer

Oil pressure gauge reads 80 psi with engine off and pegs running


That is probably a defective oil pressure gauge or a broken oil pressure sender, it reads 80 psi just because that is the maximum value allowed.

Pressure can be verified by reading it with a gauge tool.
If you really have pressure over 70 psi when engine is running then start replacing the oil filter, and check that the oil lines from pump are not obstructed, if there is nothing in there then replace oil pump.

If instead the gauge reads 80 with engine off, that is a defective pressure gauge.

Feb 25, 2009 | 2003 GMC Sierra 1500

2 Answers

Oil pressure gage


At idle, at operating temp is there any ticking from top end of engine? Are there any knocking noises brom bottom end?
If no noises, change oil and add some Marvel oil to clean out galleys. If that dosent work, change oil pressure sendingf unit. Also, if you have a mechanical oil pressure gauge, hook it up and take a direct reading. Oil pressure (in any vehicle) at idle should NEVER be less than 15psi. Generally in 4.0 jeep engines it's never less than 30, with a high reading at driving rpm of about 40-60! (but, you did not mention what engine you have)

Dec 27, 2008 | 2000 Jeep Grand Cherokee

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