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      01-22-2023, 11:59 AM   #9
johnlapay
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Drives: F30 335i
Join Date: Jan 2020
Location: UK, London

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Quote:
Originally Posted by Dennyyv View Post
Hey what's up man,

So the codes you have right now seem like the new clone dme is having a hard time pairing with the car. or the car maybe had a spike in voltage causing it to fry and short out a whole bunch of stuff (unlikely but worst case scenario)

the fan on max is explained by code
Coolant temperature sensor, electrical, Short circuit to B+
the engine doesnt know the coolant temperature its at so it goes on full panic cool down mode.

but the code
A0B4 - CAS: Engine start, starter operation
Is telling you the car attempted to start but the starter failed.
so im guessing its a no crank?

In my experience swapping just the dme and not the cas together from the same source causes problems like this.

it can be that the clone/virginizing of the dme didnt work, so its not letting the car start.

my advice although expensive advice would be maybe getting a dme/cas/key set from a donor car and trying again. (they sell them on ebay)

just my second opinion.
Hi. Thank you for your reply.

I probably will end up buying whole used set.

Do you know why I can’t just clone my old to new one (that’s what I did) - why it cannot work?

I want to check one more time all grounds and etc before will search for new ecu.

Thanks
Appreciate 0