Car just crank but don't start

[Sp@cE418]

Hi !

I've just flushed my transmission fluid and since then, sometimes it cranks, cranks, cranks and after a while got finally started.

My car did that 2 times in a week and one other time, the car shutted off while I was cruising at like 20 km/h just after a startup.

But, i don't have the 16705 - Engine Speed Sensor (G28) code, only 18010 - P1602 Power Supply (B+) Terminal 30: Low voltage (Sporadic)

My battery voltage is good and the battery haven't been disconnected for a while ...
I checked my B+ on the battery, cleaned up, cleared the code and it came right back away ...

Any ideas ? Is it my Speed or crank sensor too ?

in a week, the car did that 3 times. No mather about the weather or cold start it really seems to be random...

Thanks !