[ghost_rider]

Hello guys,

The question is after i recently replaced my eccentric shaft sensor + the servomotor on my e90 n46b20 engine because of an error "valvetronic internal fault" and "servomotor power limited " and "valvetronic adaptation".and could not delete the faults, when i try it says "fault currently persistent"

when done I checked the fault memory and it seems that the error "valavetronic internal fault" and "servomotor power limited" has vanished except for the "valvetronic adaptation"
which is still in the fault memory, i can delete it but it reappears and it is annoying me.
Do u guys know how to perform that valvetronic adaptation ?

[ghost_rider]

anyone ?

[2M]

[theref1975]

Hi Everyone,

I have a 2005/55 320 i with the yellow warning/half power light on. It has been back and forward to a local bmw garage with fault code stating valvetronic / variable valve fault.

bits off, bits cleaned/powered through etc, tested on other donor car, no fault code, tested donor car bits in mine, no fault code, light out, back to me, car running ok, but only time will tell if fault cured.

Today 2 weeks later, light back on!!!!!!!!!!!!

Diagnosis is a new ECU, at a cost of £1k, surely after reading some of your posts its not just a case of change the ecu at great expense.

any thoughts or guidance will be gratefully appreciated.

Richard

[ghost_rider]

my faults are cured found out that the engine ecu cables connections are bad So I changed them therefore the adaptation worked for me
also made an ecu update aswell an ecu reprogram to cancel the catalysator monitoring sensors now my car runs with no problems and without cat.

And many many thanks to elie335 for helping me to find that brilliant mechanic who cured my car lol

[MalM3]

good to hear you fixed it,
it looked like a serious operation you were in the middle of there..

Regarding valvetronic calibration, the motor needs to find its most extreme points of movement to figure out how much it can adjust by, similar in many respects to how you initialise the electric windows after a prolonged power cut

you would normally need a specialist tester tool, if not an orig. BMW tester

If for any instance the cam shafts or valvetronic motors are moved from position, the calibration is needed.
without doing this you risk damaging the engine internals

[ghost_rider]

Originally Posted by Mallard

good to hear you fixed it,
it looked like a serious operation you were in the middle of there..

Regarding valvetronic calibration, the motor needs to find its most extreme points of movement to figure out how much it can adjust by, similar in many respects to how you initialise the electric windows after a prolonged power cut

you would normally need a specialist tester tool, if not an orig. BMW tester

If for any instance the cam shafts or valvetronic motors are moved from position, the calibration is needed.
without doing this you risk damaging the engine internals

Before it was impossible to perform an adaptation eventhough the error was "valvetronic adaptation" it wont erase from memory and wont adapt it states that "fault is currently present" and "unable to store learning values to eeprom" so it was a cut in communication with the ecu when changed the cables performed the adaptation it learned the positions the tool was an original gt1. also took advantage to clean the small oil pipes that lubricates the cam and the vaccum pump with new gasket.
No workshop was able to properly diagnose even the dealer diagnosed a new ecu

[Elie335]

Originally Posted by ghost_rider

my faults are cured found out that the engine ecu cables connections are bad So I changed them therefore the adaptation worked for me
also made an ecu update aswell an ecu reprogram to cancel the catalysator monitoring sensors now my car runs with no problems and without cat.

And many many thanks to elie335 for helping me to find that brilliant mechanic who cured my car lol

awesome man, glad I could help you

[Neutrino45]

Are you familiar with the INPA software. I saw a feature on there for dealing with Valvetronic adaptation. You might want to check it out.

[ghost_rider]

Originally Posted by Neutrino45

Are you familiar with the INPA software. I saw a feature on there for dealing with Valvetronic adaptation. You might want to check it out.

I am not familiar with that one. Is it the diag software that I run via a laptop and connect through a usb to obd 2 cable ?
Is it this one ? http://www.dinodirect.com/gt1-inpa-d-can-obd-sp34.html

[Neutrino45]

It's this: http://cgi.ebay.com/ebaymotors/BMW-I...item2eb4ac4cce Offer $90 for the cable then you can download the software from here: http://www.e90post.com/forums/showthread.php?t=480261

[bimmer999]

Originally Posted by ghost_rider

my faults are cured found out that the engine ecu cables connections are bad So I changed them therefore the adaptation worked for me
also made an ecu update aswell an ecu reprogram to cancel the catalysator monitoring sensors now my car runs with no problems and without cat.

And many many thanks to elie335 for helping me to find that brilliant mechanic who cured my car lol

Am also having the same problem with my car, changed the servomotor and the accentric shaft sensor and after reseting valvetronic adaptation remains. i have tried the relearn trick above but after pressing the acc pedal 10 times the motor did not cycle itself. i now suspect that i might be having a problem of communication with the ecu. did u check exactly which cable in that wiring was giving problems? i am afraid of buying something that would not fix the car as i have already spent on the sensor and the motor. i tried continuity test on some cables but couldn't catch one.

[Schubee]

Originally Posted by bimmer999

...but after pressing the acc pedal 10 times ...

You do what?? Why? Where did you learn that? This is misleading info.

There are two sure ways of re-learn both end positions of the valvetronic motor.

1) Using INPA.
First, you delete the valvetronic adaptation.
Exit the program and switch the car completely off.
Remove the key and let the DME to sleep in for 5 minutes.
Then plug the ignition key back in, and turn ignition on without starting the engine.
If you have luck you will hear how the motor cycling itself.
If not, connect INPA and re-learn the motor under "System -> VVT"
Then switch off ignition once again and let the DME sleep in for 5 Minutes.

Now you should be done and everything should work.

2) Without INPA.
As described above, just turn ignition on without starting the engine. Do not do anything else. After 3-4 seconds the VVT motor will start moving and re-learning its end positions. Let the ignition on for 20 seconds to be sure.
Then switch ignition off, remove the key, close the car, let it sleep in for 5 minutes.

It must work afterwards for sure if VVT motor and sensors are in working condition!

[bercus]

Originally Posted by Schubee

You do what?? Why? Where did you learn that? This is misleading info.

There are two sure ways of re-learn both end positions of the valvetronic motor.

1) Using INPA.
First, you delete the valvetronic adaptation.
Exit the program and switch the car completely off.
Remove the key and let the DME to sleep in for 5 minutes.
Then plug the ignition key back in, and turn ignition on without starting the engine.
If you have luck you will hear how the motor cycling itself.
If not, connect INPA and re-learn the motor under "System -> VVT"
Then switch off ignition once again and let the DME sleep in for 5 Minutes.

Now you should be done and everything should work.

2) Without INPA.
As described above, just turn ignition on without starting the engine. Do not do anything else. After 3-4 seconds the VVT motor will start moving and re-learning its end positions. Let the ignition on for 20 seconds to be sure.
Then switch ignition off, remove the key, close the car, let it sleep in for 5 minutes.

It must work afterwards for sure if VVT motor and sensors are in working condition!

HI i have situation similar above mentioned
n46b18 engine on bmw 316i “2a61 valvetronic adaptation1” error after every 200-300 km
every time we make relearnig valvetronic limit but error (only one error nothing else) appears again, we do it already 21 times, 3 time error disappears byself (before every engine running i am checking it with torque app)
valvetronic motor, eccentric shaft and shaft sensor replaced with new one but without effect,
have any idea?
thank you in advance

[sebastian2017]

i have the same problem on a n46b20 engine
the valvetronic motor it s not doing adaptation/learning noting!!
i've change the vvt motor with one brand new, stil nothing! i've change the ECU with secondhand one cloned the ECU and still no calibration/adaptation NOTHIng!!!

any idieas?? maybe i have to change the wiring!