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Home >> Lexus >> 2012 >> IS F >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostic Codes (P0010-P1178)) >> SFI System >> DTC P0101: Mass Air Flow Circuit Range / Performance Problem >> Description
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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) (d), and (e) are met (2 trip detection logic):
(a) Engine running
(b) Engine coolant temperature 70°C (158°F) or more
(c) Throttle position sensor voltage 0.24 V or more, and less than 3.6 V
(d) Average engine load value ratio less than 0.85%, or more than 1.22% (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 less than -20%, or more than 20%
  • Mass air flow meter
  • Intake system
  • PCV hose connections