changed the IAC valve in a 2001 Mercury Grand Marquis and the check engine light came on. what would cause this. Thanks so much for your help.

100

Asked by Nov 02, 2014 at 06:43 PM about the Mercury Grand Marquis

Question type: Maintenance & Repair

2 Answers

210,245

Many things, have the car scanned for the codes. Your local auto parts store should do it for free, and post the 4 digit code back here and we can help. We'd just be guessing as to why your light is on.

100

Thank you. Will do

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