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Home >> Subaru >> 2018 >> WRX STI >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 6 (Engine Control System (Diagnostics - Introduction) (Except For STI)) >> Drive Cycle >> Procedure >> Drive Cycle U
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Drive Cycle U

WARNING: This page is about a different variant/trim than selected.
DTC Item Condition
P0400 EGR "A" FLOW -

Diagnostic procedure: 

WARNING: When performing the drive cycle U on the public road, be very careful of the traffic condition and the safe driving must be the high priority.
  1. Using the Subaru Select Monitor, perform the clear memory for «Engine». Ref. to ENGINE (DIAGNOSTICS) (EXCEPT FOR STI)>Clear Memory Mode>OPERATION .
  2. Drive according to the drive pattern described below.
    G12453737Courtesy of SUBARU OF AMERICA, INC.
  3. Read the temporary code using the Subaru Select Monitor or general scan tool. Ref. to ENGINE (DIAGNOSTICS) (EXCEPT FOR STI)>Read Diagnostic Trouble Code (DTC)>OPERATION .