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Post by wheelnut on Sept 5, 2014 20:03:48 GMT 1
My daughter has a 2012 Laguna 2 litre dCI. She lives about 80 miles away so I can't get to see the car.
Yesterday she had it serviced by a main dealer. Last night she went on a journey and after about 10 miles a "top up oil level" warning came on the dash. She got the car home and rang the dealer this morning. They said they would send someone out. A while later a guy turned up, not with a can of oil, but with a computer. After a while he said it was fixed. He said the problem was that the mechanic had turned on the ignition while the oil was draining and it logged a "low oil level" code. Then he forgot to clear the code before letting the car out. The only flaw in that explanation is that the car went 10 miles before the light came on.
She will not know if the light stays off until she takes the car for a drive and she has not done that yet. In the mean time I'm wondering is that explanation correct or is he bullsh!tting her.
BTW: She knows how to dip the oil but the dipstick is an off-white, yellowish plastic thing and the oil is clear, so it's very difficult to read until the oil gets a little dirty.
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Post by Karl on Sept 5, 2014 21:24:23 GMT 1
New renault/Nissan oil services are a pain
1/ they are very slow to fill and can take about half hour for the " oil level low message to delete "
Even after filling to the correct level
And those dip sticks attached to the filler cap are very difficult to read.
I personally think it's just the PCM slow to react to see the correct oil level again
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french crap fanatic
Apprentice
french car specialist based in dagenham east london
Posts: 3,355
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Post by french crap fanatic on Sept 9, 2014 14:00:23 GMT 1
2012 model is too new for have seen yet,but older models oil level sensors are completely unreliable.
we had a car on which we took the sump off and while it was waaiting for a new one i done some other things to it which included having to switch ign on,well imagine my suprise when it said oil level ok on the dash!!!
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Post by Monkey on Sept 10, 2014 7:26:54 GMT 1
I have also serviced Renaults/nissans and struggled with the oil level warning after refilling!
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Post by wheelnut on Sept 10, 2014 20:26:20 GMT 1
I wonder could the slowness of the level light be anything to do with the oil temperature? I notice from other cars with oil temperature gauges that it takes about 12 to 15 miles for the oil to reach full temperature. In my daughter's case the level light came on after about ten miles when the temperature would be getting near normal. Could it be that the level system only measures when the oil is up to a certain temperature?
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Post by mayfly on Sept 12, 2014 9:22:18 GMT 1
Don't know the answer to this but have had trouble with some Mercs after oil change. The level system seems to work fine when cold,as in when you first start up , the problem only seems to be after changing the oil. With the merc I was advised to drive it for a few miles and then it would sort itself out.
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Deleted
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Post by Deleted on Sept 12, 2014 15:48:49 GMT 1
Does anyone know how these operate.? ,ie what does the sensor use for its measurement, anyone know ,would be helpful ..
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Post by Noberator on Sept 12, 2014 17:00:15 GMT 1
Does anyone know how these operate.? ,ie what does the sensor use for its measurement, anyone know ,would be helpful .. They usually have a Service life about 50,000 switching cycles Mac.  Conductivity how easily electric current passes through the oil typically the lower the electrical resistance the more contaminants are in the oil. Mechanical properties sensors can tell how thick the oil is. Soot concentration dirty oil. Presence of water as it's an impurity in oil since it hampers the oil's effectiveness and can corrode metal surfaces. There are I believe some vehicle Manufactures using what is called Algorithm based oil indicators which have no oil level indicator at all but a computer based software algorithm that determines when the oil needs changing.  |
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Post by Karl on Sept 12, 2014 19:20:52 GMT 1
Does anyone know how these operate.? ,ie what does the sensor use for its measurement, anyone know ,would be helpful .. They usually have a Service life about 50,000 switching cycles Mac. Conductivity how easily electric current passes through the oil typically the lower the electrical resistance the more contaminants are in the oil. Mechanical properties sensors can tell how thick the oil is. Soot concentration dirty oil. Presence of water as it's an impurity in oil since it hampers the oil's effectiveness and can corrode metal surfaces. ###There are I believe some vehicle Manufactures using what is called Algorithm based oil indicators which have no oil level indicator at all but a computer based software algorithm that determines when the oil needs changing. #### Ford have a calculated oil degreagtion Temp,cold starts,short trips,failed dpf regen etc..... |
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Post by wheelnut on Sept 12, 2014 20:08:40 GMT 1
I think you guys are answering a different question, Mac asked how it measures the oil level. For instance they use a float to measure the amount of fuel in the tank, so what do they use in the sump?
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Post by Dragon on Sept 12, 2014 21:58:07 GMT 1
Does anyone know how these operate.? ,ie what does the sensor use for its measurement, anyone know ,would be helpful .. Have a look at this thread from benzworld, one of the pdf's explain it oil sensor |
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Deleted
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Post by Deleted on Sept 15, 2014 19:49:53 GMT 1
Does anyone know how these operate.? ,ie what does the sensor use for its measurement, anyone know ,would be helpful .. Have a look at this thread from benzworld, one of the pdf's explain it oil sensorThanks Dragon, good bit of tech info there ..cheers |
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Post by Dragon on Sept 16, 2014 23:39:12 GMT 1
No problem.
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