these lifetimes filters are crap, there is no such thing, and the only way they give improve airflow is by having bigger holes in the element meaning more dirt and debris can pass through, maybe some debris knocked out your MAF and you may need a new one now. its best to not mess around with factory specifications. if these were really so good you would see porsche, bmw etc installing them in cars where they follow extremely long intervals in servicing. stick to the original product, and for your existing check engine light did you note the error code before clearing? or simply disconnected the batteries? disconnecting battery trim IMO doesnt work on this or more modern cars you'll have to fix the fault.