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Old 05-17-2005, 11:49 AM
Registered User
Join Date: Sep 2004
Location: Las Vegas, NV
Posts: 701
Oil level sender failure?

I have searched the threads and now am wondering what to do next.

I replaced the oil level sender with a new one and still the light in the dash comes on much of the time. I then replaced the wire connector at the sender, no change.

The light comes on most of the time even though the oil level on the dipstick is fine. I am about to pull the instrument panel and disconnect the light especially since the car doesn't really use much oil, and I check it all the time any way.

Is there some sort of circuit board attached to the instrument panel that would cause the problem?

87 300D
Northern Iowa

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Old 05-17-2005, 04:28 PM
michael cole's Avatar
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Join Date: Apr 2002
Location: waterloo ontario
Posts: 730
there are capacitors on the circuit board which apparently get leaky after time(18 years for an 87)their function is to prevent spurious lamp lightings.i solved this problem on my car with a change to synthetic motor oil.the problem started with a change to rotella oil.dont know how this all adds up though
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Old 05-18-2005, 01:16 PM
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Join Date: Sep 2004
Location: Las Vegas, NV
Posts: 701
I now recall that when I changed to rotella synthetic was when the oil level light began staying on. I don't think I am going to much about this except to pull the light in the dash if the problem persists.

I certainly don't have to worry about running out of oil. It doesn't use much, and I sort of like checking it anyway.

87 300D
Northern Iowa
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Old 08-01-2005, 10:11 AM
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Join Date: Sep 2004
Location: Las Vegas, NV
Posts: 701
Update: I replaced the oil level sender without much trouble. And the wire connector. The problem, I think was the wire connector and not the sender itself. Seems the connector just deteriorated over time and fell apart.

However, I note that the low oil level light comes on when the level is just 1/2 quart low.

2010 CL550 - Heaven help me but it's beautiful
87 300D a labor of love
11 GLK 350 So far, so good
08 E350 4matic, Love it.
99 E320 too rusted, sold
87 260E Donated to Newgate School - check it out.
12 Ford Escape, sold, forgotten
87 300D, sold, what a mistake
06 Passat 2.0T, PITA, sold

Las Vegas NV
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