From what I understand, the two most common causes for this code are dirty or faulty mass airflow sensor, followed by vacuum leaks – (PCV hoses, vacuum hoses, intake manifold gasket). I got this code on my Buick several years ago and cleaned the MAF sensor, and all was good. CRC makes a MAF sensor cleaner and there are videos on youtube to show you how to clean it. Hopefully, your solution will be as simple as mine was.
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