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Home >> Subaru >> 2017 >> Forester 2.0XT Touring >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 17 (Engine Control System (Diagnostics) (P0171 To P0685) (H4DO)) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P0455 EVAP System (CPC) Leak Detected (Large Leak) >> Diagnostic Method >> Mode A (Vacuum Pump Operation Confirmation And Characteristics Stability)

Mode A (Vacuum Pump Operation Confirmation And Characteristics Stability)

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

Purpose: Detect the vacuum pump operation trouble.

Judge as NG when the following conditions are established.

Judge as OK if the following conditions are not established, and warm up for five minutes to stabilize the vacuum pump characteristics.

Judgment value 

Malfunction Criteria Threshold Value DTC
Pressure sensor output value > -224Pa (-1.68mmHg, -0.1inHg) P2404
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