Having problems with your 1996 Mercury Grand Marquis ?

96 mercuy grand marquie check eng light, i get a p0171 and p0174 how do i fix this.

Posted / edited by AnonymousUser on : 19-10-2020

Answers :

Could be the MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" \015\012 air filters may cause the MAF to become dirty if the filter is over-oiled. \015\012 There is also an issue with some vehicles where the MAF sensors leak the silicone \015\012 potting material used to protect the circuitry. There could also be a vacuum leak downstream of the MAF sensor which is more likely. You should inspect all the vacuum hoses and try cleaning the MAF sensor. Use only electronics cleaner to clean and let it dry before reinstalling.

If none of those work, then it may be caused by a dirty fuel filter or faulty fuel pump or clogged fuel injectors, but these are less likely
This could possibly work for a p0171 check engine code P0171 possible cheap fix
Repair Help & Product Troubleshooting for 1996 Mercury Grand Marquis

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