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#2812130 - 11/24/12 03:27 AM OBDII & Oil Pressure
MarkStock Offline


Registered: 10/23/12
Posts: 635
Loc: CA
So I've managed to get access on my laptop to what appears to be every Ford code through my OBDII reader.

But I don't seem to have oil pressure.

Is there something else that I should be looking for? I have all sorts of things I can monitor.

Also, I have a code that's telling me I have 91 octane fuel in the tank but I only fill up on regular. Any idea what that's about?

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#2812161 - 11/24/12 05:42 AM Re: OBDII & Oil Pressure [Re: MarkStock]
Shannow Offline


Registered: 12/12/02
Posts: 26878
Loc: a prison island
Put 0W-20 in it, and then there's one missing link that you don't have to worry about...ever...thy did the tests...and the tests won.

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#2812167 - 11/24/12 06:06 AM Re: OBDII & Oil Pressure [Re: MarkStock]
SteveSRT8 Offline


Registered: 10/10/08
Posts: 15181
Loc: Sunny Florida
There's a reason they don't have a gauge, oil related failures are practically non-existent.

Too much information is as bad as too little...

SOMEWHERE there is an oil pressure sender on every late model engine as the PCM needs that info. Most will cut fuel if there is a low enough reading, and even trigger a code for too much oil pressure as well.

It's in there, you just have to find it!


Edited by SteveSRT8 (11/24/12 06:08 AM)
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#2812168 - 11/24/12 06:10 AM Re: OBDII & Oil Pressure [Re: MarkStock]
Shannow Offline


Registered: 12/12/02
Posts: 26878
Loc: a prison island
He doesn't need it, nor go look for it.

Right oil, right hole...problem is simply overthinking the issue

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#2812170 - 11/24/12 06:11 AM Re: OBDII & Oil Pressure [Re: MarkStock]
EddieCairns Offline


Registered: 09/30/12
Posts: 145
Loc: Scotland
You will only get the oil pressure information if there is a an oil pressure sensor on the car. If it only has a switch to put the oil pressure warning light on and off it will not be able to display oil pressure via the ODBII system.

eddie

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#2812184 - 11/24/12 06:41 AM Re: OBDII & Oil Pressure [Re: SteveSRT8]
MarkStock Offline


Registered: 10/23/12
Posts: 635
Loc: CA
Originally Posted By: SteveSRT8
There's a reason they don't have a gauge, oil related failures are practically non-existent.

Too much information is as bad as too little...

SOMEWHERE there is an oil pressure sender on every late model engine as the PCM needs that info. Most will cut fuel if there is a low enough reading, and even trigger a code for too much oil pressure as well.

It's in there, you just have to find it!


Apparently it's not reported through the OBDII interface.

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#2812185 - 11/24/12 06:43 AM Re: OBDII & Oil Pressure [Re: EddieCairns]
MarkStock Offline


Registered: 10/23/12
Posts: 635
Loc: CA
Originally Posted By: EddieCairns
You will only get the oil pressure information if there is a an oil pressure sensor on the car. If it only has a switch to put the oil pressure warning light on and off it will not be able to display oil pressure via the ODBII system.

eddie


Aye, thanks for the explanation.

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#2812187 - 11/24/12 06:47 AM Re: OBDII & Oil Pressure [Re: Shannow]
MarkStock Offline


Registered: 10/23/12
Posts: 635
Loc: CA
Originally Posted By: Shannow
He doesn't need it, nor go look for it.

Right oil, right hole...problem is simply overthinking the issue


Correct. It's not a concern. Just an interest.

I was happy to find I could get just about every other indicator imagineable, just not oil pressure.

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#2812190 - 11/24/12 06:52 AM Re: OBDII & Oil Pressure [Re: EddieCairns]
SteveSRT8 Offline


Registered: 10/10/08
Posts: 15181
Loc: Sunny Florida
Originally Posted By: EddieCairns
You will only get the oil pressure information if there is a an oil pressure sensor on the car. If it only has a switch to put the oil pressure warning light on and off it will not be able to display oil pressure via the ODBII system.

eddie


While I have not seen them all I have yet to see any newer car without an oil pressure switch at the least. Many cars that do NOT have a gauge still collect data from an oil pressure reading somewhere in the engine.
_________________________
"In a democracy, dissent is an act of faith."
J. William Fulbright
Best ET-12.79 @ 111 mph
4340 pounds, Street tires
Just like we go to Publix

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#2812192 - 11/24/12 06:55 AM Re: OBDII & Oil Pressure [Re: MarkStock]
NHGUY Offline


Registered: 10/09/11
Posts: 3397
Loc: USA
I wonder if VVT vehicles have to log psi data...afterall thats how the valve timing actuators work...oil pressure.

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#2812194 - 11/24/12 06:56 AM Re: OBDII & Oil Pressure [Re: MarkStock]
Donald Offline


Registered: 03/21/04
Posts: 13557
Loc: Upstate NY
You might even be thankful about the switch vs sensor. My Cummins engine has a $275 sensor and has + and - voltage going to it along with the sensor output. Unsure why. It feeds the ECM. And mine would go to midpoint with key on, engine running or not. So I replaced it.
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Amsoil ATF in both vehicles & Magnefine filter.

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#2812245 - 11/24/12 07:48 AM Re: OBDII & Oil Pressure [Re: MarkStock]
Miller88 Offline


Registered: 04/09/08
Posts: 6857
Loc: Onondaga County
You're going to have to tap and install an aftermarket oil pressure gauge. I am going to do just that when the Focus gets out of warranty.

Not having any problems with it, but I just like to watch it.
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#2812301 - 11/24/12 08:44 AM Re: OBDII & Oil Pressure [Re: MarkStock]
pcoxe Offline


Registered: 05/14/07
Posts: 338
Loc: South Carolina
The octane rating on the pump is the minimum allowed. A dealer many years ago showed me a delivery slip where his "regular" fuel delivery was actually rated 90 octane, almost high enough to put in the premium tank.

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#2812304 - 11/24/12 08:46 AM Re: OBDII & Oil Pressure [Re: Shannow]
Trav Offline


Registered: 11/20/06
Posts: 10049
Loc: MA, Mittelfranken.de
Quote:
thy did the tests...and the tests won.

But but i need to check the oil pressure. I cant drive a bloody test. crackmeup
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#2812314 - 11/24/12 08:55 AM Re: OBDII & Oil Pressure [Re: MarkStock]
RF Overlord Offline


Registered: 11/08/03
Posts: 3155
Loc: Cape Cod, MA
As EddieCairns states above, most Ford vehicles, since at least 1990 in the US, don't have a real working OP gauge so that info will not be available in the OBDII data. Even if there is a "gauge", it's a fake that's been ballasted to read approx midway at all times and gets its info from a switch rather than a true sender. It was one of Ford's "better ideas" to hush up people too dumb to realise oil pressure is SUPPOSED to vary with RPM and temperature.
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