LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Subaru >> 2018 >> Forester 2.5i, Standard Trans >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostics - Introduction) (H4DO) >> Drive Cycle >> Procedure >> Drive Cycle U
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Drive Cycle U

DTC Item Condition Number of driving cycles on the detecting condition
P0400 EGR "A" FLOW - 2
WARNING: When performing drive cycle U on a public road, pay sufficient attention to the traffic condition and give the highest priority to safe driving.

Diagnostic procedure: 

  1. Drive according to the drive pattern described below.
    G12519053Courtesy of SUBARU OF AMERICA, INC.
  2. Read the temporary code using the Subaru Select Monitor or general scan tool. Ref. to ENGINE (DIAGNOSTICS) (H4DO)>Read Diagnostic Trouble Code (DTC)>OPERATION .