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  1. #1
    Saab Fan
    Join Date
    28 Jan 2011
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    SE Washington
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    32
    Saab(s)
    1997 900SE, 2003 9-5 Linear
    Thumbs Up:   0

    Oil Pressure Light

    Saab 95 sitting in the garage right now, the oil light came on - but seems to be operating backwards from what on would think. When the engine is good and warm, driving at highway speed - light blinks, slow down and at idle it goes out. I haven't had time to check things yet - too cold! I did replace the oil pressure sensor a couple years back when trying to look for oil leaks. Bad sensor? Other ideas?

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  2. #2
    mdb99@bellsouth.net
    Oh! I Get It Now Mike Brennan's Avatar
    Join Date
    21 Aug 2010
    Location
    Williamsburg, Va. and Cedar RIver Mi.
    Posts
    634
    Saab(s)
    01 95 Aero and Wagon, 09 93 Combi and an 08 95 Combi
    Thumbs Up:   13
    You know what's wrong, your screen is clogged, your PCV system is not updated, or both. Stop driving and drop your sump or you might have to throw the car away.

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  3. #3
    Bruno
    Saab Addict swisssaabist's Avatar
    Join Date
    18 Nov 2016
    Location
    Cheeseland or TICTAC land
    Posts
    603
    Saab(s)
    9-5 ARC Wagon 2002 2 t auto engine B205E
    Thumbs Up:   56
    I approve the post from Mike I've in November a close issue ... results swapping engine coz the timing chain is going bad in few minutes.

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  4. #4
    Saab Enthusiast
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    19 Jul 2015
    Location
    Charlottesville, VA
    Posts
    218
    Saab(s)
    1997 NG 900 SE
    Thumbs Up:   40
    Listen to Mike Brennan. Anytime oil light comes on while at highway speeds, it's bad news. As oil heats up and thins, if pressure is very low at higher revs, it's seizure time.

    Sent from my LG-K373 using Tapatalk

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  5. #5
    Saab Fan
    Join Date
    28 Jan 2011
    Location
    SE Washington
    Posts
    32
    Saab(s)
    1997 900SE, 2003 9-5 Linear
    Thumbs Up:   0
    Thanks for the replies. I dropped the sump about 10,000 miles ago (163,000 miles), wasn't real dirty - do you think it would be clogged already?. Did PVC update, new engine mounts, new front seal, urethane subframe bushings at that time. Have always used LiquiMoly 5-40 synthetic every 5000 miles.
    Thanks, TR

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  6. #6
    Saab Enthusiast
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    19 Jul 2015
    Location
    Charlottesville, VA
    Posts
    218
    Saab(s)
    1997 NG 900 SE
    Thumbs Up:   40
    Hmm... You may not be in such dire straits. Probably best to have oil pressure checked out. And if you put in a Proparts switch, that could be the issue. They are known to not give good readings. Hope for the best.

    Sent from my LG-K373 using Tapatalk

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  7. #7
    Saab Owner Digger's Avatar
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    28 Oct 2016
    Location
    Minneapolis Minnesota
    Posts
    1,125
    Saab(s)
    2006 9-3 2.0t SportCombi
    Thumbs Up:   156
    Yes it is possible to have a bad connection where the wind can wiggle the wires and flicker the light as you drive down the road, but on a motor that is known to sludge the sump that would be the second thing to check, not the fist

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  8. #8
    Bruno
    Saab Addict swisssaabist's Avatar
    Join Date
    18 Nov 2016
    Location
    Cheeseland or TICTAC land
    Posts
    603
    Saab(s)
    9-5 ARC Wagon 2002 2 t auto engine B205E
    Thumbs Up:   56
    when you have saying about your engine this not a main issue did you change the oil pressure sensor ? if not this is on driver side heading rear of the engine ( Saab head mech have said to me it's pain in ... to do coz it's a little bit unattainable.

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  9. #9
    Saab Enthusiast
    Join Date
    19 Jul 2015
    Location
    Charlottesville, VA
    Posts
    218
    Saab(s)
    1997 NG 900 SE
    Thumbs Up:   40
    Yes, the oil pressure sensor is not very accessible. Usually have to get at it from under the car, removing the starter, and using a special tool, oxygen sensor socket or crows foot, to replace it. Use only the OEM part. Complaints about Proparts part flickering at idle. Just remembered seeing on another site about pressure relief valve sticking, causing low oil pressure at highway speeds. I believe that is behind/or near the front main seal cover. Anyway, it'd be best to check oil pressure, and then choose the right remedy. Hard to diagnose over the net.

    Sent from my LG-K373 using Tapatalk

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  10. #10
    Saab Fan
    Join Date
    28 Jan 2011
    Location
    SE Washington
    Posts
    32
    Saab(s)
    1997 900SE, 2003 9-5 Linear
    Thumbs Up:   0
    Thanks again for input. I wish there were an easy way to connect a gauge. I did replace the sensor, I remember having to pull the starter and using a crowfoot to install. I doubt I installed an OEM sensor - but I will this time - I was trying to find an oil leak. I looked at oil filter adapters to allow for a gauge - anybody tried one?

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