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Home >> Lexus >> 2013 >> IS 250C Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (Diagnostic Codes (P0010-P0175)) >> SFI System >> DTC P0101: Mass Air Flow Circuit Range / Performance Problem >> Description

DTC P0101: Mass Air Flow Circuit Range / Performance Problem: Description

Refer to DTC P0102. Refer to DESCRIPTION .

DTC No. DTC Detection Condition Trouble Area
P0101 Conditions (a), (b), (c) and (d) are met (2 trip detection logic):
(a) Engine coolant temperature 70°C (158°F) or more
(b) Throttle position sensor voltage 0.2 V or more, and less than 2 V
(c) Average engine load value ratio less than 0.85, 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
(d) Average air-fuel ratio less than -20%, or more than 20%
  • Mass air flow meter
  • Intake system
  • PCV hose connections