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Home >> Subaru >> 2021 >> WRX Premium, Standard Trans >> Repair and Diagnosis (Single Page) >> Engine Performance >> Testing & Diagnosis >> Engine Control System (Diagnostics) (2.0L) (3 Of 4) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P1134: A/F/02 Sensor Bank1 Sensor1 Serial Peripheral Interface (SPI) Communication >> Diagnostic Method
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Diagnostic Method

Judge as NG when the following conditions are established

JUDGMENT VALUE SPECIFICATION

Malfunction Criteria Threshold Value
Communication status between CPU and A/F sensor microcomputer Malfunction

Time needed for diagnosis:  80 ms

Malfunction indicator light illumination:  Illuminates as soon as a malfunction occurs.