is check engine on sounds like throtle position sensor or map sensor,may want toalso check temp control sensor maby have a scan done autozone will do this for free,
It could be due to the kickdown from high to low idle. I have had similar things happen with other vehicles. Have the codes read and see if any stored codes are there that have not tripped the Check Engine light on.
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#3Mandy Crowe JohnsonReputation940
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