Can a bad mass airflow sensor and/or bad coil(s) cause a Valvetronic System fault?
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I had a engine light come on at 70K, and then it went out. No issues. Then at 73K, my car started idling rough, the light came on, then went out, then it came on again with an additional service engine light. I had noticed the car jerking in 1st gear 2-3 x randomly. The car has lost power, etc. Got multiple errors from BMW diagnostic, 1.) mass air flow sensor failure 2.) coils? and 3.) valvetronic system with multiple cylinders misfiring. I am wondering if the mass air flow sensor and coils could be causing the valvetronic failure and that by replacing the first two will solve the last, making this repair much more affordable.
How long has your 2010 BMW 335i xDrive had this problem?
Just came up about a month ago
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Hello, There is nothing simple about your 335i and the driveability. You need to have a pretty thorough diagnostic test performed to find out what's going on. You have coils, yes, and a MAF, but you also have a turbocharger to consider as well as high pressure fuel pump. This isn't a simple system -- good troubleshooting is necessary or you'll be possibly throwing good money after bad.
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