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Old 01-15-2007, 12:55 PM   #1
NeoteriX
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Member#: 20999
Join Date: Jul 2002
Chapter/Region: NESIC
Location: NJ
Vehicle:
2002 PSM WRX Stg 2
knee - Aw - teh - rix

Default Intermittent Oil Pressure Light woes

I just got my car back from the Subaru dealership, and it turns out I had a busted coolant hose.

[disaster history here: http://forums.nasioc.com/forums/show...php?t=1172158]

Everything seems to be running alright, and I made the drive back to Boston without incident. The only cause for concern at the moment though is that the oil pressure light lights up when the car has been sitting for a while, especially in cold weather it seems. After several minutes of idling once the engine temps seem to warm up to normal operating temperatures, the light fades away.

This was clearly not something that occurred prior to the highway disaster. Is this a damaged sensor? Another problem? Cause to call up the dealership and have them make things right?
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Old 01-15-2007, 05:35 PM   #2
crampfan
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It would not be a bad idea to return the vehicle to the dealer and have it checked. if the engine was overheated, you may have caused some damage to the lower end, and then it may only be a bad electrical connection, or sender unit. Ether way I don't like to ignore a oil pressure warning lamp. It needs to be checked out.
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Old 01-16-2007, 03:34 AM   #3
Hamzor
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Location: Tustin, CA
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I have the same prob.

After my coolant hose busted ( the one near the alternator, where the oil pressure sensor is located) the oil light will be on very dim during wet weather or in the morning. It usually goes away after five minutes of operation. My oil level is fine. In the current weather, I have not seen it in the last month.

I have been told that to fix the prob you have to pull out the sensor and clean it.

I would not worry about any damage to the car, I read that the oil pressure light has only two modes of operation, fully on or fully off, with it being dim, it has to a short in the system.
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Old 01-16-2007, 12:45 PM   #4
Mulder
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The oil pressure warning light is an LED. It only takes a small amount of leakage current to make it light up dimly, since you had a coolant leak there is probably some conductive residue left behind that is providing a ground path for the light. This can probably be fixed by disconnecting the sensor and cleaning the sensor, plug, and surrounding area.
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Old 07-19-2008, 03:56 AM   #5
Synx
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Bump, good to know Mulder, just had my car towed back to my house because of coolant leak of some kind, not sure where but appears to be coming from the hose that goes into the reservoir tank. Had coolant all over the crank pulley and surrounding areas, followed by a very dim oil pressure lamp. I shut it down right away and had it towed, but this makes me feel a ton better. I am going to drain the oil and coolant when i get back up this morning and see what i find.

Where is the oil pressure sending unit on the EJ205?
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