Scotty, I just changed the spark plugs on my wife's 2012 Dodge Grand Caravan. I also had a vacuum…

Scotty, I just changed the spark plugs on my wife's 2012 Dodge Grand Caravan. I also had a vacuum pump code, why did the code for the vacuum pump go away after I did that? I was also going to replace the vacuum pump but figured there is no sense in it now.

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