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The BMW E46 ///M3 is the M version E46 and puts out an amazing 333 HP and 262 lb-ft of torque at stock specs! There are an amazing amount of modifications for both the coupe and convertible models so read up and get started modifying your cars today!

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Old 04-02-2013, 11:29 PM   #1
KSK
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Engine codes indicating VANOS failure?

Hey guys

Long time lurker first time poster. Hoping I can get some insight on this here
I just got the trouble codes read on my 02 m3 and got the following:

43 - Activation, inlet VANOS, bank1, advance valve
07 - Signal, camshaft sensor, inlet, bank 1
B8 - Function, inlet VANOS, bank 1
16 - Activation, exhaust VANOS, bank 1, advance valve
B9 - Function, exhaust VANOS, bank 1

Do these sound like a typical VANOS system failure that will require the unit to be replaced or is further diagnosis recommended? I'm thinking of doing the repair myself
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Old 04-03-2013, 01:43 AM   #2
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You can't really "repair" a vanos you have to buy a new refurb or brand new one, when my vanos needed to be replaced I went with dr.vanos, look them up and they give you 400 dollars back if you give them your old vanos, good luck with everything
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Old 04-03-2013, 08:09 AM   #3
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First time getting these codes?

Do you have any other symptoms (rough idle, sluggish performance, rattling sounds, ect?)

Reset the fault codes and allow the engine to idle. If the fault codes are generated in a few minutes, then the vanos malfunction is likely to be one of two things: loose intake sprocket mounting bolts OR vanos malfunction caused by broken vanos oil pump exhaust sprocket hub driver tab(s). These are two common reasons Vanos codes are generated..

If the car does not generate the codes within a few minutes, then it's likely to be intermittent solenoid failure which is a much easier and cheaper thing to fix.

I struggled with intermittent vanos related issues for months and months before I realized my issue was with a faulty solenoid. Simply going to the dealer and replacing the solenoid will result in the same codes eventually because of the faulty OEM design. So I refer you to Beisan Systems who solved all my vanos troubles with their remanufactured solenoid pack.

I stopped taking my car to the dealer for vanos diagnosis since they refuse to acknowledge the OEM faulty solenoid and faulty cam bolts. Try those things out I told you and let me know what you come up with...
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Old 04-03-2013, 11:29 AM   #4
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Yes, it sounds like the solenoid pack. The problem does not have to be intermittent. Mine was not.

It could still be the tabs, though.
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Old 04-05-2013, 12:38 AM   #5
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Quote:
Originally Posted by karl hungus View Post
First time getting these codes?

Do you have any other symptoms (rough idle, sluggish performance, rattling sounds, ect?)

Reset the fault codes and allow the engine to idle. If the fault codes are generated in a few minutes, then the vanos malfunction is likely to be one of two things: loose intake sprocket mounting bolts OR vanos malfunction caused by broken vanos oil pump exhaust sprocket hub driver tab(s). These are two common reasons Vanos codes are generated..

If the car does not generate the codes within a few minutes, then it's likely to be intermittent solenoid failure which is a much easier and cheaper thing to fix.

I struggled with intermittent vanos related issues for months and months before I realized my issue was with a faulty solenoid. Simply going to the dealer and replacing the solenoid will result in the same codes eventually because of the faulty OEM design. So I refer you to Beisan Systems who solved all my vanos troubles with their remanufactured solenoid pack.

I stopped taking my car to the dealer for vanos diagnosis since they refuse to acknowledge the OEM faulty solenoid and faulty cam bolts. Try those things out I told you and let me know what you come up with...
Have all those symptoms, rough idle (not too bad but a bit rough) performance loss in low rpm and I was told by a friend driving in a car beside me that the engine sounded weird and "off"

Not too sure how long those codes have been, I changed the exhasut cam position sensor a while back since I was told by a mechanic I had that code when I bought the car, but hadn't bothered resetting the computer since, it's been almost 8 months. I just reset it after reading the above codes, going to change the intake cam position sensor before turning it on (since I already have it) then let it idle and monitor the codes again as you mentioned above

Worthy to mention the previous owner had changed the Vanos with a Dr Vanos unit approx 2 years ago, which also apparently came with a new solenoid, so I'm a bit surprised to see these codes, and that's why I decided to change the sensor first, even though it's most likely not the cause

Thanks for the Besian referral, will definitely give them a try if it narrows down to be the solenoid
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Old 04-05-2013, 12:47 AM   #6
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IS there a general consensus on here regarding reliability of these Dr Vanos units? As mentioned above both the vanos and the solenoid had been replaced by the previous owner with Dr Vanos replacements approx 2 years back

Thanks
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Old 04-10-2013, 03:28 PM   #7
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IS there a general consensus on here regarding reliability of these Dr Vanos units? As mentioned above both the vanos and the solenoid had been replaced by the previous owner with Dr Vanos replacements approx 2 years back

Thanks
I don't trust the Dr.Vanos solenoid replacement since it is a direct factory replacement solenoid. Which means, it is susceptible to failure in the same way. The beisian systems solenoid is literally remanufactured to correct the faulty solder joints and sealing plate O rings.
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Old 05-28-2013, 07:52 PM   #8
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do you have any misfires? I'm having a similar problem with the codes saying that it's vanos but I think it's the o2 sensor. my car runs fine when it's moving but when it idles, it misfires and throws on a check engine light and when i turn it off and back on, it goes away
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Old 05-28-2013, 08:14 PM   #9
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Re: Engine codes indicating VANOS failure?

You can rebuild your vanos like myself and many many others have done.

www.beisansystems.com

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Old 05-28-2013, 08:32 PM   #10
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Engine codes indicating VANOS failure?

but I don't thinks it's vanos lol. they had the headers out so maybe they plugged the o2 sensors into the wrong plugs I hope that's the case


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Old 05-29-2013, 01:13 PM   #11
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do you have any misfires? I'm having a similar problem with the codes saying that it's vanos but I think it's the o2 sensor. my car runs fine when it's moving but when it idles, it misfires and throws on a check engine light and when i turn it off and back on, it goes away
It's possible that the O2 harness was reversed during the header install. What exactly are your codes?
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Old 05-29-2013, 08:03 PM   #12
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It's possible that the O2 harness was reversed during the header install. What exactly are your codes?
uhh I don't know off the top of my head but I could tell you what is wrong with it. So basically if I let it idle, it starts to (cylinders 3-6) misfire and the check engine light comes on but if I turn the car off real fas and restart it, all is good and the light goes off. I hope it's just the o2 senors reversed
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Old 06-01-2013, 02:03 AM   #13
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Engine codes indicating VANOS failure?

Quote:
Originally Posted by XKR View Post
uhh I don't know off the top of my head but I could tell you what is wrong with it. So basically if I let it idle, it starts to (cylinders 3-6) misfire and the check engine light comes on but if I turn the car off real fas and restart it, all is good and the light goes off. I hope it's just the o2 senors reversed
I had the same problem when I put header son... I had reversed the o2sensors. Looking the web and there r some pics that help identify them. Soon as I made the change the car ran great.


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Old 06-01-2013, 06:06 PM   #14
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I had the same problem when I put header son... I had reversed the o2sensors. Looking the web and there r some pics that help identify them. Soon as I made the change the car ran great.


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apperantly mine was a ground problem. and the coilpack needed updates because of the brands. something about how bremi coils were bad or I think I was running Bosch coils. not sure but the problem got solved
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