Wrong Random code spare key mini cooper

[Ecuprog31]

Hi all
I have a mini cooper 2005 to do a spare key ( ews3+)
I’ve did many of ews system without problem with tango
the car start with original key but no crank with new key
and in log I’ve this error “wrong random code “ just with new key and car doesn’t crank
move changed position key and resync dme/ews it’s the same
Any idea please

[comizelu]

Hi all
I have a mini cooper 2005 to do a spare key ( ews3+)
I’ve did many of ews system without problem with tango
the car start with original key but no crank with new key
and in log I’ve this error “wrong random code “ just with new key and car doesn’t crank
Any idea please

What transponder chip are you using?
Use 7935,not super chip..

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[Ecuprog31]

Yeah I’m using original 7935 nxp
I’ve tried scan and fix with tango also

[Ecuprog31]

Any idea please

[fred77]

pcf7935 key to new slot & write back to ews.
I normally use ak90. But sometime fails ie rover 75 and the abrites.

[lion0304]

pcf7935 key to new slot & write back to ews.
I normally use ak90. But sometime fails ie rover 75 and the abrites.

I've never write back to EWS, just program free track and start.

AK90 is the best for EWS

[fred77]

Yeah just habit now i've done 100s as sure u done

just saying maybe fix his issue

[Antonio266]

Try to put ignition on with new programmed transponder for one minute, after that read the transponder with Tango, and tell us if you can see exact car's mileage readed in the new transponder