Red engine warning light

michaeluk2003 · 05-20-2023, 01:09 PM

Hi everyone
I have a 2012 e91 318i with a red engine warning light. I scanned it with inpa and it came back with 2 fault codes, one for static oil pressure and one unknown. I have spent may hours in and under it replacing the oil pressure sensor, hydraulic valve, oil and filter and have had the subframe and oil pan off and removed a little piece of timing chain guide. It had had the timing chain done before I got it. All of the codes where cleared and the light disappears for about 30 seconds then reappears. it appears while i am making a turn at a junction so it could potentially be related to low rpm, breaking or changing gear. Inpa shows that the low oil pressure code has gone but the unknown fault code is still there.
The code is 14082.
I have no idea where to go from here and any help would be greatly appreciated.
P.S. The fuel cap is fully in.

jwilalex · 05-21-2023, 10:19 AM

A few years back I had similar after chain /guide replacement and it turned out to be the balance shafts on the oil pump.

Tambohamilton · 05-22-2023, 05:38 PM

I think your oil pump is dead, but I could be totally wrong! Is the vacuum pump built into the oil pump on that engine, same as the N47?

I think 14802 corresponds to 3702(h), which is vacuum plausibility. Could be a dead sensor, I guess on the brake servo, or could be a dead oil/vacuum pump. Reason I suspect the latter is because you're getting the oil pressure code too, and it's eaten its old guides.

michaeluk2003 · 05-29-2023, 06:22 AM

i changed the vacuum sensor and the problem is sorted, thanks for the suggestion. I've tested it and it makes good oil pressure so I think everything is good after cleaning the pickup.
Thanks for the help!

05-20-2023, 01:09 PM	#1
michaeluk2003 Registered 1 Rep 3 Posts Drives: e91 318i Join Date: May 2023 Location: cumbria iTrader: (0)	Red engine warning light Hi everyone I have a 2012 e91 318i with a red engine warning light. I scanned it with inpa and it came back with 2 fault codes, one for static oil pressure and one unknown. I have spent may hours in and under it replacing the oil pressure sensor, hydraulic valve, oil and filter and have had the subframe and oil pan off and removed a little piece of timing chain guide. It had had the timing chain done before I got it. All of the codes where cleared and the light disappears for about 30 seconds then reappears. it appears while i am making a turn at a junction so it could potentially be related to low rpm, breaking or changing gear. Inpa shows that the low oil pressure code has gone but the unknown fault code is still there. The code is 14082. I have no idea where to go from here and any help would be greatly appreciated. P.S. The fuel cap is fully in.
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05-21-2023, 10:19 AM	#2
jwilalex Private First Class 31 Rep 123 Posts Drives: E90 318i LCI SE Business Edn Join Date: Jan 2016 Location: Glasgow iTrader: (0)	A few years back I had similar after chain /guide replacement and it turned out to be the balance shafts on the oil pump.
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05-22-2023, 05:38 PM	#3
Tambohamilton Brigadier General 3058 Rep 3,909 Posts Drives: E91 330d Join Date: Apr 2019 Location: Herefordshire iTrader: (0)	I think your oil pump is dead, but I could be totally wrong! Is the vacuum pump built into the oil pump on that engine, same as the N47? I think 14802 corresponds to 3702(h), which is vacuum plausibility. Could be a dead sensor, I guess on the brake servo, or could be a dead oil/vacuum pump. Reason I suspect the latter is because you're getting the oil pressure code too, and it's eaten its old guides.
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05-29-2023, 06:22 AM	#4
michaeluk2003 Registered 1 Rep 3 Posts Drives: e91 318i Join Date: May 2023 Location: cumbria iTrader: (0)	i changed the vacuum sensor and the problem is sorted, thanks for the suggestion. I've tested it and it makes good oil pressure so I think everything is good after cleaning the pickup. Thanks for the help!
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