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Thread: When car is idle, red oil pressure light comes on [M43B19TU]

  1. #1
    Join Date
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    When car is idle, red oil pressure light comes on [M43B19TU]

    Basically i renewed a lot of parts(list below), put everything back together and when my car is in idle the oil pressure light comes on. When i tap the gas pedal a little bit it dissappear, temperature in the car is normal (~90°C). I currently have P0170 and P0135 fault codes, but i had them previously already when i didnt have any troubles with the oil pressure light.
    Also there is enough oil, i did an oil change 2 days ago.
    https://imgur.com/JP4yJkU
    What could be the issue here? Faulty oil pressure switch or maybe the oil pump? I also have an oil leak somewhere (always had

  2. #2
    dworthy's Avatar
    dworthy is offline Wagon meister :) BMW Tech Expert
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    When you did the oil change, did you also replace the two smaller o-ring on the "stick"? If these are old and worn, it can cause low oil pressure at idle.

    Next would be to have a pressure gauge attached to where the sensor is, and the minimum pressure at idle should be 1.0 bar.
    Darin
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  3. #3
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    You mean the dipstick where i check oil level? I didnt check there

  4. #4
    dworthy's Avatar
    dworthy is offline Wagon meister :) BMW Tech Expert
    Join Date
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    16 220i 05 325it 05 M3
    No, it would be on the plastic cap that the oil filter is attached to per say. They are supposed to be green, but over time will turn black from the oil.
    Darin
    Current:
    16 220i Active Tourer Platinsilver MET (C08)/Dakota Black (PDSW), P7ACA, P7LDA, P7LHA, P9BDA, 6sp Manual - Wife's new toy!
    05 325it Electric Red(438)/Gray(N6TT) ZCW, ZSP 5sp Manual Back set cover, trunk mat, Euro Infra-Rot front windshield, and mud flaps! Mr. Wagon My new Winter car.
    05 M3 Imolarot II(405)/Gray(N5TT) ZCW, ZPP 6sp Manual C.F. Lip, CSL diffuser, SSK, Euro Infra-Rot front windshield and a trunk liner! Mr. Go_Fast Stored for the Winter
    Past:
    95 318is Montreal Blue Met (297)/Beige(K1SN) RIP, killed by an Idiot.
    84 M535i gray market Burgandy Rot Met/Black Leather Lowered by Intrax on bilies, poly everywhere, B&B cat back system, K&N, and a hitch! Da Beast - Still running w/400k+!
    91 316i euro Tizianrot/Gray cloth - E-36 w/M-40 RIP, but great on gas! Best was 38 MPG
    82 528i euro Saphire Blue Met/Blue Leather RIP
    79 525 euro Green/Green RIP
    79 318 Silver/Black - The first one that got it all started
    M-Flight Member

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