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Home >> Lexus >> 2021 >> GX 460 Base >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Control System (Diagnostic Codes) (1 Of 7) >> SFI System >> DTC P0101: Mass Air Flow Circuit Range / Performance Problem [08/2015 - ] >> Description
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DTC P0101: Mass Air Flow Circuit Range / Performance Problem [08/2015 - ]: Description

Refer to DTC P0102 (Refer to DESCRIPTION ).

DTC No. DTC Detection Condition Trouble Area
P0101 Conditions (a), (b), (c), (d) and (e) continue for more than 10 seconds (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 2 V or less.
(d) Average engine load value ratio is less than 0.85, or more than 1.15 (varies with estimated engine load).
Average engine load value ratio = Average engine load based on MAF 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 assembly
  • Intake system
  • PCV hose connections
  • EGR valve assembly