2010 Mercury Grand Marquis Questions

All 2010 Mercury Grand Marquis Questions

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MY engine light came on right after an oil change. I took my car back and they told me and showed me 4 "spark plug" like things under my car and told me I had 4 oxygen sensors that were not functional on the diagnosti...
the fuse for the dome light blows if the fuse does not blow the battery discharges
message board states " change engine oil soon". I recently changed the oil.
the light swic h inside has like a wafer that is white in coler and gets very hot