BMW Questions? Ask a BMW Repair Expert for Answers.
In order to help you, I will need more detailed information, it appears you were attempting to replace an ignition coil while the engine is running, which does not make mechanical sense.,
The vehicle computer, interpreted your actions, as an attempt to steal the car, or tampering, which most likely has triggered the antitheft system. Try locking and unlocking the door repeatedly using the fob. Then attempt to start the engine. If this fails, manually lock and unlock the passenger door, with the key, then attempt to start the engine. If this fails, the vehicle computer will have to be re-flashed at a BMW dealer. Please rate my service, I will continue to answer your questions, until you are completely satisfied with my answers.
Spark is normal, when coil is removed from the plug, with engine running, its possible the coil spark, which incidentally is the improper way to check for misfire on a BMW, spiked the engine computer coil driver for that coil. Please rate my service, I will continue to answer your questions, until you are completely satisfied with my answers. Next time check for misfire on your Bemer with a scanner.
I am sorry I came across that way, The computer may be damaged, the coil driver is part of the circuit board of the computer, it would be highly unlikely that this has occurred I am inclined to believe some other issue has occurred simultaneously with the coil testing involving the anti theft system.
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