190E (W201) 1982-1993: 190E 2.3, 190E 2.6, 190E 2.3-16, 190E 2.5-16, 190 D 2.2, 190 D 2.5, 190 D 2.5 TURBO, 190E 2.5-16 Evolution I, 190E 2.5-16 Evolution II

Oil pressure gauge pegged with engine off

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Old 03-06-2008, 07:37 PM
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1993 190E 2.6
Oil pressure gauge pegged with engine off

Not sure why I get a full oil pressure reading with the key on and the engine off. Doesn't have a sender wire shorted to ground.

TIA!

Jack
Old 03-07-2008, 02:45 AM
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1993 190E 2.6
Originally Posted by rurlndum
Not sure why I get a full oil pressure reading with the key on and the engine off. Doesn't have a sender wire shorted to ground.

TIA!

Jack
Ive never had that problem. I have the exact same car as you too. I think you are the only one on here with a 93 2.6
Old 03-07-2008, 12:43 PM
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ML500 AMG pkg
It's a bad sending unit! It hapened to mine.
Old 03-07-2008, 10:16 PM
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1993 190E 2.6
Oil pressure gauge pegged with engine off

Wow! Thank you very much!

I kept studying the electrical wiring diagrams but now your answer makes perfect sense.

I really appreciate your help,

rurlndum
Old 03-14-2008, 12:12 PM
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1993 190E 2.6
Never mind. The new sending unit didn't fix a thing!
Old 04-19-2008, 03:20 PM
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Found the problem

I finally traced the problem to a bad connection behind the instrument cluster.

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