That is a Mass air flow sensor code. Try removing it and clean it with CRC MAF cleaner and reinstall and see if the light goes out or clear the codes afterward. If that doesn't work, then maybe the sensor itself has failed. But check the wiring next, there could be an open, shorted, frayed, poor connection, etc. in the wiring.
2001 Mercury Grand Marquis LS
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Maintenance & Repair
engine light came on , water is fine and oil and votage is okay what is the problem??
1997 Mercury Grand Marquis 4 Dr LS Sedan
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Maintenance & Repair
69 flashes from check engine light Whats the code
2000 Mercury Grand Marquis LS
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Maintenance & Repair
Check engine light code reads P0420, what does this mean?
2002 Mercury Grand Marquis GS
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Maintenance & Repair
grand marquis 2008 what is a (p0325 code mean) and what is exactly
2008 Mercury Grand Marquis GS
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Maintenance & Repair
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