Question about 1994 Toyota Pickup

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Oil pressure gauge indicates zero pressure when I know there is 60.

Oil pressure gauge indicates zero when there is normal pressure. I installed a new oil pressure sender (for a gauge, not a light). The wires check ok and the gauge checks ok. When it gets back together, it still indicates zero pressure.

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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  • 187 Answers

SOURCE: oil light

No oil spiting out the open hole is not a good sign. Im sure you checked the oil level but check it again. Do not run the engine with no oil pressure or it will eat itself up in real fast. The problem could be in the pump itself. They seldom go bad but the some times they will have a clogged pick up screen or shear a pin on the gear.

Posted on May 08, 2009

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emissionwiz
  • 76848 Answers

SOURCE: After having the clutch and rear seal replaced in

the first thing you do is check the wiring to the sender, they may have damaged it when the engine hung down during the clutch change,

Posted on Aug 30, 2009

mecanica03
  • 907 Answers

SOURCE: oil level gauge not working. replaced sender unit.

check if sender fit your car, if good, maybe the problem is oil pump , dirty oil filter, poor quality engine oil

Posted on Sep 11, 2009

  • 114 Answers

SOURCE: I have recently purchased a 1997 Toyota

Unless you are in a cold part of the country, I'd suggest 10W40 or even 20W50 and see if the oil pressure improves. Mobil 1 will often yield lower oil pressure in higher mileage engines when hot. It's really not worth the money unless you live in near arctic conditions.

Posted on Dec 20, 2009

alicantecoli
  • 22246 Answers

SOURCE: my oil sender is always blinking yet my engine oil

no you could have low oil pressure though ,find oil switch and if it has a rubber boot cover pull it back to see if has oil behind it ,if it has renew the switch

Posted on Dec 31, 2009

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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:
?€¢
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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

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1 Answer

Oil pressure is 60 psi with engine not running, jumps to 80 when engine starts


so where your eyes look at to see 60, ?
the dash?
or a real gauge , at the block, port. (gallery)

you must learn 2 things, about dash gauges
  1. they are not really instruments. not even close, more toy like.
  2. and some return to zero others do NOT.
many cars made, you key off and the gauges, freeze.
this is nothing new and is normal.

use the scan tool yet and look for DTC errors from the cluster?
in any event.
id concerned about engine oil pressure , try a real gauge.
if concerned about just the dash gunge?, then scan it first. then do the self tests shown in the FSM.

this car the PCM sense oil pressure data via the PCI bus
to the cluster and then it displays this data.
im not sure which years return to zero.
the PCM gets its DATA from the oil pressure sender.
if the pCM shows the data to bee good using a scan tool
then we check for errors on the PCI buss. if that is good
the display is bad, if the data is wrong. there.

here is the path of data. in text
sender>>> pcm>>> pci bus>>>> cluster.>>> gauge.

see the FSM page , 1 or 9 pages just for the cluster. page 7

factory service manual or alldata.com
either.

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Oil pressure gauge flickers all over then goes to zero shut engine light comes on oil has 1000 miles on it 5w30 control cold or warm may return to normal 60/70 then 0


Problem could be a bad oil pressure sensor or the oil pump is failing. A mechanical oil pressure gauge needs to be hooked up to verify actual oil pressure. Problem could also be a bad stepper motor in the instrument cluster that drives the gauge.

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1 Answer

Oil pressure gauge reads zero, engine appears to be running fine with no noises what so ever, no oil leaks, oil level is normal.


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If the gauge verifies that the oil pressure is indeed low, then the oil pan needs to come of for an inspection of the oil pick-up tube and the engine bearings.

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1 Answer

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