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Home >> Lexus >> 2009 >> IS 250 AWD >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Control System (DTCS P0010 - P0368) >> 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 P0100. Refer to DESCRIPTION .

DTC No. DTC Detection Conditions Trouble Areas
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 (TP) sensor voltage 0.24 V or more
(d) Average engine load value ratio less than 0.85%, or more than 1.3% (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 less than -20%, or more than 20%
  • Mass Air Flow (MAF) meter
  • Air induction system
  • PCV hose connections