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Registered User
Join Date: Sep 2009
Location: New Hampshire
Posts: 14
Oil Guage Problem

Car: 2002 C4 Cab with 67,500

The Problem: While driving, the "oil failure" warning light comes on and the oil pressure guage drops to 0. Occurs randomly, no association with leisurely driving or going fast. Lasts about 10 seconds then returns to normal. No perceived mechanical changes while this occurs. My mechanic drove the car and couldn't get it to occur.

Does this sound like a sensor problem, or is the oil pump starting to go on me?

Thanks for the input!

Old 02-15-2010, 08:21 AM
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Author of "101 Projects"
Wayne 962's Avatar
I had the same problem on my 959. Whether it's a 959 or a 996, you still want to make sure it's the sensor, not the engine. So, I replaced the sensor. It's pretty easy to do - it's in the engine compartment - I have a tech article coming out on this soon. Definitely replace the sensor first (it is actually the same sensor that is used on the 959), as these fail *all* the time. We sell a ton of them.

Wayne R. Dempsey, Founder, Pelican Parts Inc., and Author of:
101 Projects for Your BMW 3-Series 101 Projects for Your Porsche 911 How to Rebuild & Modify Porsche 911 Engines 101 Projects for Your Porsche Boxster & Cayman 101 Projects for Your Porsche 996 / 997
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Old 02-16-2010, 09:41 PM
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Registered User
Join Date: Sep 2009
Location: New Hampshire
Posts: 14

Thanks for the advice. My mechanic thought the same thing. Any idea when the tech article would be available?

Old 02-17-2010, 05:09 AM
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Aerkuld's Avatar
Join Date: Oct 2006
Location: Bay Area, SF, CA
Posts: 2,467
Originally Posted by Wayne at Pelican Parts View Post
In a month or so. It's fairly easy to replace, but I can't recall how the access is in the 996 engine compartment.

It's pretty easy to access. Sits about 1/2 way along the engine (front to rear) on the right hand side. It sits up with the two wires sticking up vertical. It may be a bit of a reach, but it's relatively easy.

I agree with Wayne that failures of these seem relatively common. Mine does it at odd intervals and I take the wires off and clean the contacts. It will be fine for months, then it will start doing it again. I don't know whether it is a bad connection or whether the sensor is really playing up. I should probably buy a new one...
2002 996 Carrera - Seal Grey (Daily Driver / Track Car)
1964 Morris Mini - Former Finnish Rally Car
1987 911 Carrera Coupe - Carmine Red - SOLD :-(
1998 986 Boxster - Black - SOLD
1984 944 - Red - SOLD
Old 02-18-2010, 09:43 AM
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