LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 2012 >> Prius Three >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (Except Plug-In) (Diagnostic Codes (P0010-P043F)) >> SFI System >> DTC P0101: Mass Air Flow Circuit Range / Performance Problem >> Description
April 5, 2026: LEMON Manuals is launched! Read the announcement.

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 All of the following conditions continue for more than 10 seconds (2 trip detection logic):
(a) Engine running
(b) Engine coolant temperature 70°C (158°F) or more
(c) Throttle position sensor voltage is 0.2 V or more, and less than 2 V
(d) 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
(e) Average air fuel ratio less than -20%, or more than 20%
  • Mass air flow meter sub-assembly
  • Intake system
  • PCV hose connections
  • EGR valve assembly