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P219A-00 Code 2014 Chevy Equinox 2.4L


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I've got a 2014 Chevy Equinox with new pluigs, coils, fuel injectors, recent top-engine carbon clean, new AC Delco O2 sensors, and relitively new CAT. Getting a P219A-00 for Fuel trim cyliner balance. Any ideas where to start diagnosing? I saw this online as possible causes:

  • Leaking or contaminated fuel injectors
  • Low fuel pressure or running out of fuel
  • Leaking evaporative emission (EVAP) canister purge valve
  • Exhaust or intake air system leaks
  • Exhaust gas recirculation (EGR) system
  • Positive crankcase ventilation (PCV) system is leaking or the valve is stuck open
  • Ignition system
  • Incorrectly seated engine oil dipstick, tube or oil fill cap

Just curious if anyone has had this issue with a GMC of Chevy and succesfully diagnosed.

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