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Home >> Subaru >> 2021 >> WRX STI >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (Diagnostics) (2.5L) (1 Of 4) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P0111: Intake Air Temperature Sensor 1 Circuit Range/Performance Bank 1 >> Diagnostic Method

Diagnostic Method

If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.

JUDGMENT VALUE SPECIFICATION

Malfunction Criteria Threshold Value
|Intake air temperature when 21568 ms elapses after engine start - Engine coolant temperature at engine start| > Value of Map 1
|Intake air temperature when 21568 ms elapses after engine start - ambient temperature when 21568 ms elapses after engine start| > Value of Map 2
MAP 1 SPECIFICATION

Ambient temperature (°C (°F)) -30 (-22) 30 (86) 45 (113) 60 (140)
|Intake air temperature when 21568 ms elapses after engine start - Engine coolant temperature at engine start|
(°C (°F))
12 (53.6) 12 (53.6) 22 (71.6) 22 (71.6)
MAP 2 SPECIFICATION

Ambient temperature (°C (°F)) -30 (-22) 30 (86) 45 (113) 60 (140)
|Intake air temperature when 21568 ms elapses after engine start - ambient temperature when 21568 ms elapses after engine start|
(°C (°F))
20 (68) 20 (68) 32 (89.6) 32 (89.6)

Time needed for diagnosis:  Less than 1 second

Malfunction indicator light illumination:  Illuminates when malfunction occurs in 2 continuous driving cycles.