Question about 1999 Mercury Grand Marquis
Engine light on codes 1131 and 1151 show
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Posted on Jan 02, 2017
Have a look at these links and it will give you a better idea of your problem : http://www.obd-codes.com/p0171 and it seems you have a general problem with air flow meter or air mass meter somewhere...give it a good clean and testing and if required replace it.Remember you will need to reset ECM each time you do something here.
Posted on Oct 17, 2009
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