LEMON Manuals: Even more car manuals for everyone
Home >> Infiniti >> 2015 >> QX60 Base, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 116 (Engine Control System (DTC/Circuit Diagnosis) (VQ35DE) (Except Hybrid) (3 Of 3)) >> DTC/Circuit Diagnosis >> DTC P219A, P219B: Air Fuel Ratio >> DTC Logic >> DTC Detection Logic

DTC Detection Logic

WARNING: This page is about a different car, the 2016 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:

If DTC P219A or P219B is displayed with other DTC, first perform the trouble diagnosis for the other DTC. Refer to  DTC INDEX  . 

DTC No. CONSULT screen terms
(Trouble diagnosis content)		 DTC detecting condition Possible cause
P219A AIR FUEL RATIO IMBALANCE B1
(Air-fuel ratio imbalance bank 1)		 ECM detects a lean/rich air fuel ratio state in any cylinder for a specified length of time.
  • Fuel injector
  • Exhaust gas leaks
  • Incorrect fuel pressure
  • Mass air flow sensor
  • Intake air leaks
  • Lack of fuel
  • Incorrect PCV hose connection
  • Improper spark plug
  • Insufficient compression
  • The fuel injector circuit is open or shorted
  • ignition coil
  • The ignition signal circuit is open or shorted
P219B AIR FUEL RATIO IMBALANCE B2
(Air-fuel ratio imbalance bank 2)
scientia non olet · About LEMON Manuals