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OYou could check the plug wires and coils too. If the plugs aren't firing right it could be the wires or coils.
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OOldFart replied to the thread Dreaded P219B.Yes, the check engine light came on. I used my el cheapo scanner to pull the P129B code. It is showing an O2 sensor voltage of 0.75...
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OI have a 2017 Ford Expedition and had a CEL about 3 weeks ago and scanner showed P219B. Mechanic said 2 of the 3 fuel injectors on Bank...
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