Many code troubles + doubt

[Christophe.m]

Today I've put the tester for check 2 problems...

FIRST : one month ago when I m was on the race track, waiting on the pit lane before go on the track the transmission light is lit when I started the engine... I turned off and start again and the light disappeared...

SECOND : I'm was driving on the freeway at 120km/h at low load and the engine light turner on... I tried to turn off and on the engine but the light was still here.

So today I saw than the transmission code was:

- '' Error gear selector ''
- '' heated oxygen sensor second row Befor catalyst )

( sorry I haven't check the code number )

My question is : These are known problems ?

- for the SMG, is that the '' beginning of the end '' ( my car has 53'000 km )
- for the Oxygen sensor, does you would change the both sensor or only the defective ?


And I have also an other BIG question !

I feel than my clutch slips a little bit at ''cold'' and after 3-4 upshifting everything is ok the clutch is very aggressive...

So I begin to look some informations about it and I saw on internet that apparently the CSL get many problems with the SMG. I heard than BMW has a new Soft where the shifting is faster, more aggressive and the clutch slip less...

So I went to BMW for ask about it and they told me than I have to change my whole gear box because it's a disease on the M3 and my light announced the beginning of the end.

And they told me than there isn't any new soft from BMW... And it's often a source of problems to update the Control Unit...


Does someone can help me ?

thank you

[LeinsCSL]

Regarding the oxygen sensors, mine displayed a warning light, and when the codes were read it had errors for both sensors. However, just one was replaced (pre-cat as far as I remember) and that then fixed it with no more warnings

BTW, I think it takes 3 full restarts before a warning light will disappear if there's no longer a problem. Mine did for a couple of months, but then came back on all the time

[giraffe]

Sounds like your dealer hasnt got a clue - gearbox relacement for warning light on can you imagine how many scrap cars there would be , it could be as simple as low battery voltage or faulty sensor but would need further testing to find out . Software can sometimes improve gearchange but normally resetting gearbox and clutch adaption values helps unless your clutch or flywheel is worn out . As for oxygen sensor fault normally replace the faulty sensor .

[shimmy]

Originally Posted by giraffe

Sounds like your dealer hasnt got a clue - gearbox relacement for warning light on can you imagine how many scrap cars there would be , it could be as simple as low battery voltage or faulty sensor but would need further testing to find out . Software can sometimes improve gearchange but normally resetting gearbox and clutch adaption values helps unless your clutch or flywheel is worn out . As for oxygen sensor fault normally replace the faulty sensor .

Chris...........listen to the man!

[Christophe.m]

Yes I know than the problem is not the gearbox and I would not change it... But I said that for show how much they don't know anything about this car and te day when I ll really have something wrong I ll alone for fix it ^^

Anyway I m just a little bit confuse because I ll make the Inspection II by my self in 7'000 km and I don't have access for doing everything like reset the gearbox after servicing...

Does with take off the battery is that enough for reset or I need the computer ???

Thank you

[DuncanR]

Regards Oxy sensors, before owt else, are you running OEM zorst system or other ? If other system, even just a back box, then the light will come off and on all time.

[giraffe]

Hi you can reset service light without computer but to set up gerbox/clutch needs BMW computer as it activates various stages of gearshift and clutch operation so it can learn where the positions are . sorry this doesnt help you .