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I have a 2013 Ford Explorer Limited 3.5l and I have a very intermittent (after roughly 500 miles of driving) P219B engine code. The car has new spark plugs, fuel injectors, no intake leaks, no exhaust leaks, does not have a bad purge valve, and no type of misfire or any other computer recorded information. MAF sensor has been cleaned and also has a newer air filter. Oil dip stick and oil fill cap are both seated correctly too. Wondering what could be causing this intermittent code to come back.
 

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Probably just an O2 Sensor going bad.
Yup
Thats what I thought, but not quite sure

I would test & check the readings of both O2's on bank 2
And compare them with bank 1 readings first.

If both checks out, then dig further deep.

R u sure you replaced OEM set of injectors..?
After market ones would cause such false readings.
 
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