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BMW 3-Series (E90 E92) Forum
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fan runs on extreme high at startup?
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10-16-2011, 03:57 PM | #23 |
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btw- it does not come on the exact moment I start the car...about 1-3 minutes after it is running....this morning for example:
1. started car 2. pulled out of driveway 3. drove 2 blocks and then i could hear fan kick on highest level 4. this continued until i got on a major road and picked up speed then fan slows or shuts down |
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10-23-2011, 11:31 AM | #25 |
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I was gonna say that. The free code scans you can get at your corner store are usually not able to see all of the BMW specific codes, which is why you didn't see anything until you checked with a Peake, which is designed specifically to read manufacturer specific codes.
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10-23-2011, 12:14 PM | #26 | |
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Certain states need it for inspection. They aren't labeled the same as BMW codes. They are P codes. BMW has they're own codes but each one of those codes will also have a P code matching it. There are very few codes that aren't matched to P codes. You only need a BMW specific scanner for pulling codes through modules such as your FRM or CAS module which are only found in BMWs. |
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11-27-2012, 01:29 PM | #28 | |
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I would say have the codes read and see if you can get live readings of the oil and coolant temperatures as well as the coolant from radiator temperature. There is a temperature sensor at the radiator and at the heat exchanger - maybe one of them is faulty and triggering the ECU to think that the fan needs to be running... Last edited by Three_thirty_I; 11-27-2012 at 02:11 PM.. |
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11-27-2012, 01:42 PM | #29 |
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I agree with post above. Check temp sensor before changing water pump. If the car is not overheating, its most likely a faulty sensor. Keep us posted.
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12-01-2012, 07:33 AM | #31 | |
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12-01-2012, 09:29 AM | #32 |
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Will be doing my thermostat/pump, oil housing gasket, coolant flush/replacement, might as well change the auxiliary fan switch too.
http://www.ecstuning.com/BMW-E90-325...oling/ES34327/ Can't believe the OP got diagnosed fan replacement because it was working on start-up too fast. It's like, they just guess. Too bad it's not $$$ out of their pocket. If it was, you can bet they would be more thorough. |
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12-01-2012, 09:44 AM | #33 | |
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12-01-2012, 05:28 PM | #34 |
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Yes, I have noticed it and thought it odd, but didn't think farther of it. Just assumed if something was wrong, I'd get an indication. For $20, I will replace it now since I gotta do coolant anyway.
There is also this http://www.ecstuning.com/Search/13621433076/ES2091379/ Not sure if its for the same thing since p/n is the same except for the last number or it's two different things. Would assume two different things since from the pics, they don't like like they fit the same way. Haven't looked at IPB's on realoem to make sure of everything since I am not doing this till after the New Year. |
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12-02-2012, 12:01 AM | #35 | |
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12-18-2012, 09:40 PM | #37 |
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12-21-2012, 01:19 PM | #39 |
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On the tech side, usually a fan coming on full blast even on cold start does indicate a water pump failure/issue. Almost everyone I have seen will do this even cold started and when it comes in the shop usually have water pump speed/communication faults. Some people don't come in complaining of an overheat message either.
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12-24-2012, 10:45 PM | #40 | |
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It no longer comes on. |
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01-03-2013, 05:58 AM | #41 |
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engine cooling fan does not shut off
i need some help as my bmw 318i se 2008 engine cooling fan turns on after around 10-15 mins and does not turn off until i switch the engine off.
really anoying as its loud previous owner told me that it needs a new waterpump but seems to be fine. can some tell me were the temp sensor/switch is located? thanks |
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01-03-2013, 03:07 PM | #42 | |
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Dont post here that much, but Geez!
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04-06-2015, 03:41 AM | #43 |
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need test or...
Mine: fan comes on when engine cold start in the morning. Fan start to working loudy, and when I drive the car a few km, fan is turn off, engine temp is normal on dash. Sometimes when I restart engine in the mornings, fan never comes on once again. Im sure about one thing, after engine temp is getting warm, fan never comes on when I restart engine, its happening only once time in the morning, when I turn engine on first time.
I got INPA and DCAN cable but I dont know what kind of test that I must do? Can I monitor water pump with INPA or just only check error codes for temperature sensor & water pump? And I read somewhere about bleeding coolant...do I have to make that test also? I doubt, last week bleeder screw broken (because of over tighten) and when engine running, high pressured water splashed out everywhere...maybe temperature sensor damaged cause of water? Last edited by lovnblack; 04-06-2015 at 01:24 PM.. |
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