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Hyundai XG350 - Oil Pressure Light Fades In and Out

2 messages,  Last post on Apr 13, 2009 at 5:45 AM

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What is this discussion about? Hyundai XG350, Electrical, Engine, Oil, Sedan

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#1 of 2 Oil Presure Light Fades In and Out by Ultragames Jan 14, 2009 (12:28 pm)
Ever since I got my 2002 Hyundai XG350L, the oil light has faded in and out. It will be totally off for days or even a week at a time, and then it will be "on". I say "on" because it never just lights up like any of the other lights. Rather it blinks ever so lightly as i'm driving. When I accelerate, it goes off completly, and when I brake or idle, it comes back brighter.   I know that the bulb/LED for my oil light is working, because when I start the car, the light has full solid brightness.   Does anyone have any idea why this light would be fading in and out, and sort of blinking slowly? It never reaches full brightness, and the car doesn't drive any differently when it's on.   By the way, I did get an oil change just to see if that fixed the problem, and it did not.   Thanks. Replies to this message: ineedajob (Apr 13, 2009 5:45 am)
#2 of 2 Re: Oil Presure Light Fades In and Out [Ultragames] by ineedajob Apr 13, 2009 (5:45 am)
Replying to: Ultragames (Jan 14, 2009 12:28 pm) It’s coming on because the oil pressure is low. Either you have low oil level in the car, low oil pressure (or regulator) or a bad oil sending unit (which is your most likely candidate). I would check the oil level first and make sure it is up to the mark, then I would put a mechanical gauge on it by removing the sending unit and see what it says. Remember, when looking at a mechanical gauge the pressure WILL fluctuate a lot, low at idle and high at highway speeds. If everything is within specs with the mechanical gauge (see the manual for the specs), I would replace the sending unit (should be relativity inexpensive). If it’s out of spec, you looking at an oil pump (which can be costly, and a lot of work). Good Luck.

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