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iDrive not reading my oil level all of the sudden (3446 and 38A4 codes).
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04-24-2024, 09:42 AM | #1 |
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iDrive not reading my oil level all of the sudden (3446 and 38A4 codes).
Hi,
I've got a e92 335i n55 (108k miles) and today I tried reading my oil level and to my surprise iDrive said "Measurement inactive. Service interval adjusted. Have the system checked during next oil service". Naturally I don't want to wait a few months for my next oil change as I like keeping track of my oil level ( I put a liter 2 weeks ago as it has consumed it all in less than a year ). My DME codes are: 3446 - BSD, message; oil condition sensor: Missing. 38A4 - BSD, message; intelligent battery sensor (IBS): Missing. I've noticed in other forums that the 38A4 one is just a consequence of the other one so I don't think there is a problem with the IBS sensor (could be wrong, just guessing). I've also seen people get other BSD related codes along with these ones so I am not sure what is triggering mine exactly. Any ideas? Thanks! |
05-02-2024, 01:13 PM | #3 |
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05-16-2024, 01:29 PM | #4 |
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Update
Update: just did the oil change and swapped the sensor with the ridex one from autodoc. Problem is still there and I am still getting the same codes... I don't know what to do anynmore
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05-17-2024, 03:18 AM | #5 |
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Also just mention that the sensor was receiving power so in theory there is nothing wrong with the electric line/harness. I am thinking it could be software / ECU related maybe.
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05-17-2024, 11:08 AM | #6 | |
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My interpretation of your two-reported Faults is that the DME is NOT able to communicate with the OZS (Oil Condition Sensor) via the BSD Bus (Violet wire as shown on attached ISTA ScreenPrint). ALWAYS check wiring BEFORE replacing component, as suggested in "Service Plan" in Fault Info sheet linked below. If you would like test suggestions using $10 US/ 10 Quid (Amazon UK) Multimeter, please advise & provide Last-7 Characters of VIN. Generally: you want to inspect each of the Pins & Sockets, & the Violet wire where it attaches at X62540/1 and ALSO at X60002/43. Then TEST wire for continuity between X62540/1 & X60002/43. ALSO Test for "Short" to Chassis Ground. Here are "BMW Fault Code Lookup" definitions of those two codes, with Fault Info Sheet for each linked below definition: 3446 | BSD, message; oil condition sensor: Missing | mevd176k | Engine electronics https://bmwfault.codes/XMLDiagView?d...kAMAAxADAANAA= 38A4 | BSD, message; intelligent battery sensor (IBS): Missing | mevd176k | Engine electronics https://bmwfault.codes/XMLDiagView?d...kAMAAxADAANAA= Attached are ISTA ScreenPrints of the Violet BSD Interface wire, with Connector Location & Connector View (for Pin# ID) of the Connectors at the OZS & X60002 at the DME beneath the Intake Manifold. George |
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06-01-2024, 11:26 AM | #7 | |
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09-09-2024, 01:52 PM | #8 |
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Hi, I want to try disconnecting the IBS sensor to see if I am able to get a read of my oil level in case the IBS sensor is the one causing the problem (I hope this makes sense). Does anyone know where is the blue plug on the lci e92 models? I cannot locate the one Ive seen in the non lci ones (lots of pics and videos of that one out there but non of the lci…)
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09-09-2024, 02:46 PM | #9 | |
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09-11-2024, 03:02 PM | #10 |
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So today I managed to disconnect the IBS terminal from the negative terminal of the battery and still got the same codes as before. I am now wondering whether this could be the connection to the sensor (X62540 in the pictures above) that somehow got damaged the last time I took the car to the mechanic (catless dp fitting)… will try to give it a look but I am beginning to lose patience so maybe I will take it back to an indy or the bmw dealer
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09-11-2024, 04:04 PM | #11 |
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Also, keep in mind that bad signals from other BSD devices like the Alternator or the water pump can also cause other devices to lose signal or stop communicating.
as a test you can unplug the BSD bug plug from the alternator and see if the sensor starts working again. If that doesn't work then you can try it with the water pump. I once replaced my alternator with an Autozone alternator and it caused issues with everything on the BSD bus. |
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09-22-2024, 07:42 AM | #12 |
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Failures 38A4, 3847, 378F, 3446, Motor N55 in an X6-E71
Hi, got the save failures:
38A4, 3847, 378F, 3446 First it began with too often running electric water pump even when motor cold and I unlocked the car with cold motor. Then, the oil level inactivity. I bought and changed after 2,5k kilometers oil change a VEMO sensor. Same oil refill as oil change was not long ago, with additional 0,5 liters to the other quantity. After 5 minutes driving and visible oil level, same level measurement inactivity. then after 40 driving I stopped and went under car and with no motor running I unplugged and replugged the cable of the oil level sensor. For some minutes after that the level measurement worked again. Then back to inactivity. Suspiciuos is for me the Alternator/Generator and/or IBS. Where is the IBS located? just at the ground Battery cable? Part 12427603567? I wanna check the sensors cables (oil level sensor & water pump) for potential damage and consider to change alternator and IBS. |
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