[chrisca70]

Hello all,

So just finished replacing my Valve cover and gaskets on my X1 2013 with the N20 engine with 82k miles. Tedious job but pretty straightforward. I have done all VCGs on all my bimmers E30, E46, E92, and never had a problem.

However, the car won't start. It cranks but it won't start. Battery was disconnected before the job and fully charged with my battery tender overnight after the job. I double checked all connections, bolt torques, etc. and all seems to be ok. I read the codes with bimmerlink and the only one I get is:

Code A10A
EWS4_Timing_Chall_Resp_Fehler
Symptom: No signal".

Any suggestions? -appreciate any input.