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Home >> Nissan-Datsun >> 2017 >> Sentra SR Turbo, Standard Trans >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTCS) (1.6L) (2 Of 4) >> DTC/Circuit Diagnosis >> DTC P0172: Fuel Injection System Function >> DTC Logic >> DTC Detection Logic

DTC Detection Logic

DTC No. CONSULT screen terms
(Trouble diagnosis content)		 DTC detecting condition Possible cause
P0172 FUEL SYS-RICH-B1
(Fuel injection system too rich)
  • Fuel injection system does not operate properly.
  • The amount of mixture ratio compensation is too large. (The mixture ratio is too rich.)
  • A/F sensor 1
  • Fuel injector
  • Exhaust gas leaks
  • Incorrect fuel pressure
  • Mass air flow sensor
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