how do I get the engine emissions icon off? Idled rough, icon came on. used fuel additive,now idles fine. icon still on.

Asked by Nov 20, 2011 at 10:51 PM about the 2007 Mercury Grand Marquis LS Premium

Question type: Maintenance & Repair

1 Answer

Turns off after the gas is "dried" from the H20 in the tank. STP gas treatment worked fine. Icon went off after about 5 minutes of driving.

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