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Home >> Subaru >> 2019 >> WRX STI Limited >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 19 (Engine Control System (Diagnostics) (Except For STI) (1 Of 4)) >> Diagnostic Procedure With Diagnostic Trouble Code (DTC) >> DTC P0068: MAP/MAF - Throttle Position Correlation >> Diagnostic Method

Diagnostic Method

WARNING: This page is about a different variant/trim than selected.

Judge as NG when Low side or High side becomes NG.

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
Low 
Intake manifold pressure (absolute pressure)
< 75 kPa (562.6 mmHg, 22.2 inHg)
High 
Intake manifold pressure (absolute pressure)
≥ 75 kPa (562.6 mmHg, 22.2 inHg)

Time needed for diagnosis: 

Low side: 5000 ms

High side: 5000 ms

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