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P0491 code

3089 Views 2 Replies 3 Participants Last post by  jwight
Just got this car a week ago. 2017 coupe. Runs fine and set this code yesterday. Know it is secondary air pump system failure. Only 15k on this car. My 2016 got flooded and totoled. It is cool weather and I am in south Texas so cold and humid so check valve failure allowing moisture in pump is my guess. It is under warranty but quite a drive to dealership.
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hey, do you remember what they had to do to fix this? I have this code and Mercedes wanted $3k to replace the whole air intake system
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