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Thread: Oil Pressure or oil level?

  1. #1
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    Default Oil Pressure or oil level?

    The oil light came on in the screen inside the rev counter. It was yellow with an oil can above wavy lines. Is this oil level or pressure? Red light comes on and goes out with ignition.

    My car is a CDTI150

    I changed the oil+filter last week(5-30w fully synth). I put 4 litres in. I was ready to gradually top up, but after checking, the oil was way past the max level. I dropped a litre and gradually topped it up by maybe half a litre over a couple of hours. I did 20 miles and checked the oil the next day and it was way above max again.
    Ignoring this, I did 60 miles outward yesterday and the light above came on. I plugged the fault reader in and the light went out(I didn’t clear it, it just went out). RAC guy came out and can’t put his finger on it. I drove home(60 miles) with no more warning light.

    I plan to change the pressure sensor and get somebody else to do another oil and filter change. I'll look out for diesel in the oil. Coolant level appears fine. No mayo.

    Is this a warning sign of fuel pump playing up? head gasket?

  2. #2
    Regular Member Hue Jarse's Avatar
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    Vehicle : Vectra Estate

    Trim : SRi

    Engine : 1.8 VVT (Z18XER)

    Year : 09

    Default

    The yellow light is oil level warning. Oil pressure lights are always red.

    Assuming you drained as much as possible out when you done your oil change I wouldn't have thought 4 litres should have taken it "way over the max".

    The yellow light could be caused by a faulty level sensor (it's in the sump) but that wouldn't explain the variable dipstick readings. I remember seeing a thread on this forum recently where people were having trouble getting a clear dipstick indication. (Not sure it was on the 1.9 though).

    You are doing it on level ground and wiping the dipstick before taking the reading aren't you?

    Has this only happened since you did the oil change or were you having problems before?

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    Default

    Ahh, oil level. That makes me feel a bit better. Cheers
    The oil was drained as much as possible. The car was level(not lower to the rear as would be ideal).
    I am fitting a new pressure sensor when the oil change is done(RAC guy gave me one) to rule this out.
    The oil level passes the full level and climbs up the actual dipstick by probably 10mm.
    I am checking the oil level from cold, on a flat surface and wiping the dipstick first.

    I have read about dodgy seals allowing diesel into oil and the engine overrunning. Probably more likely that I have arsed up the oil change(only done about 100 before). lol

  4. #4
    VIP-Member Z80's Avatar
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    Vehicle : Opel Vectra GTS

    Trim : Elegance

    Engine : 2.2 DTi 16V

    Year : 2003

    Mileage : 75 000

    Default

    Hi !

    There's no oil pressure sensor on the Vectra, only a level sensor, a temperarure sensor and a pressure switch.

    I mean it can't send any pressure value, just trigger an alert when the pressure falls under 0.3 and 0.55 bar.

    I replaced it with an Omega B pressure sensor, featuring both a switch (triggers at 0.4 bar, which matches the OEM specifications) AND a pressure sender. The pressure sender has a classical bolt-on connection, while the switch has a short length of cable with a connector that's directly compatible with the one from the Vectra. The ground connection in made through the car (and engine) body, as on the Vectra.

    It then gives a plug-and-play 100% compatible pressure switch (same threading to sump, same connector to the car) plus an additional pressure sender to feed a VDO electric oil pressure gauge. All winner mod.


    Here are the parts numbers and characteristics :


    Vectra C OEM oil pressure switch :

    OPEL 1252 572
    SAAB 90 569 684
    VAUXHALL 90569684
    GENERAL MOTORS 90569684

    Length : 50 mm
    Intérieur diamèter 1 mm
    Extérnal threading M 14 x 1,5 mm
    Threading length : 12 mm
    Spanner size : 24 mm
    Cconnections : 1
    Switching pressure : 0,3-0,55 bar
    Paint marking : brown
    Weight : 0,031 kg


    Omega B 2.5 TDi 150 bhp oil pressure sensor :

    FAE : 14010
    OPEL : 1252563 - 1252564
    GENERAL MOTORS : 90337694 - 90337695
    HELLA : 6ZL 003259-581
    VDO : 360.081/030/123 - 360.081/036/007

    Measuring range : 0-5 bar
    threading size : M14 x 1,5 mm
    Switching : 0,40 bar


    Enjoy.

    I could find one on eBay... Turkey !

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    Default

    Cheers Z80. The Roadside mechanic gave me a pressure switch(not sensor) to fit, so I will replace it for peace of mind when my oil filter is changed.

    In my head, there is not enough oil in the engine and the low light came on, but dipstick reads too much. I am confused. The problem seems to have cleared but I will check the oil level again when I get home(driving the van today).

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