I received this code and had two suggestions: either the sensor itself is faulty or their is an air leak. I want to check for any leaks first. Where, on a 2001 Bonneville, are the air hoses located? Are there any common locations on this model where leaks generally occur.
I currently have my SES light on. Thanks for any insight. This forum has been a great resource.

on a gm the code description says circuit fault low. so its the sensor or the plug or wires to the pcm. on that vehicle i know they put a pump access port on top of the tank, you may be able to access the sensor there.

Thank you for your advice regarding the p0452 code. I replaced the part. That coupled with cleaning the MAF sensor led to my SES going out. This forum is two for two when it comes to the auto issues I have had. Thanks again.

thanks for updating your fix, good to hear