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Home >> Lexus >> 2017 >> CT 200h Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System - Diagnostic Codes (1 Of 3) >> SFI System >> DTC P0101: Mass Air Flow Circuit Range / Performance Problem [08/2014 - ] >> Description

DTC P0101: Mass Air Flow Circuit Range / Performance Problem [08/2014 - ]: Description

Refer to DTC P0102 (See article. Refer to DESCRIPTION ).

DTC No. DTC Detection Condition Trouble Area
P0101 All of the following conditions are met (2 trip detection logic):
(a) Engine is running.
(b) Engine coolant temperature is 70°C (158°F) or higher.
(c) Throttle position sensor voltage is 0.2 V or higher, and below 2 V.
(d) Average engine load value ratio is less than 0.84, or more than 1.15 (varies with estimated engine load).
Average engine load value ratio = Average engine load based on mass air flow meter output / Average engine load estimated from driving conditions
(e) Average air fuel ratio is less than -20%, or more than 20%.
  • Mass air flow meter sub-assembly
  • Intake system
  • PCV hose connections
  • EGR valve assembly