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Home >> Lexus >> 2015 >> GS 350 F Sport, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Diagnostic Codes (1 Of 4) >> SFI System >> DTC P0101: Mass Air Flow Circuit Range / Performance Problem [09/2014 - 10/2015] >> Description
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DTC P0101: Mass Air Flow Circuit Range / Performance Problem [09/2014 - 10/2015]: 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 0.2 V or more, and less than 2 V
(d) Average engine load value ratio less than 0.85 (for all models), or more than 1.15 (for AWD models) or 1.19 (for 2WD models) (ratio 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