Question about 1995 Volkswagen Jetta

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Oil light buzzer

95 jetta 2.0. even if the crank case is full, the low oil buzzer activates ( real loud) it does it only when the engine is warm. is there a sensor besides the oil sending unit or what could be activating this?

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The warning system indicates an oil pressure problem. If the oil pressure monitoring system does not see the proper amount of oil pressure to lubricate and protect the engine it will illuminate the light and sound the light and sound the warning. This is a "fail safe" system, so if a sensor was to fail it would also trigger a warning. It "may" be a switch or wiring problem, but it could also be an oil pressure problem. I recommend you get it checked out as soon as possible. The oil pressure should be checked and the warning system tested. Serious engine damage could result from ignoring the warning, it's potentially serious, that's why it beeps.

If the light comes on every time the engine exceeds 2,000 RPM, this may be a sensor. If it only comes on after driving for a period of time, this would indicate a possible mechanical problem. If the engine is not making any new, excessive, "ticking" or "clacking" noises it is likely safe to drive. No guarantees but likely.

I suggest you first check the oil level, if it is below the add mark, add oil until it is between the marks. If it was low (more than 1 quart), you need to find out where the oil went. If it was not low, your back to the above described and it needs to be checked out.

There are a number of mechanical problems that could account for low oil pressure, sludge being one of them. But until you know if it is an electrical issue, or an actual low pressure issue and know what the pressure is, it would be pointless to speculate in this case.

If the condition were caused by a failed oil pump the engine oil pan would have to be removed in order to replace the pump. Joe

Posted on May 01, 2010


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