My daughter has a 2004 Exporer . It runs fine but idles too low. Check engine is on. codes P0172, P0175, ans P0193. Aut Zone analysis recommended changing the mass air flow sensor. It did not help. Any ideas?
P0172 and P0175 are lean codes, probably caused by P0193...http://www.engine-codes.com/p0193.html
No they are rich codes.
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