← Subaru WRX (GD/GG, 2002-2007) problems

Clogged oil-feed screens starving the turbo (P0011)

Reported · Severity: High · Years: 2002-2007 (EJ-powered)

Symptoms

P0011 (intake cam timing) code; turbo wear or failure.

Cause

A turbo rebuilder reports small oil screens (AVCS banjo / turbo feed) clog with varnish from degraded oil; the passenger-side screen feeds both turbo and the intake AVCS solenoid, so the code can appear after the turbo has already run starved.

Fix (summary)

The rebuilder says the specialist community recommends removing the screens on turbo EJs, and to fix the screen before fitting any replacement turbo. Verify against current guidance; the TSB numbers it cites were not independently checked.

Sources

• Subaru Turbo Rebuild (AVCS screen / ringland debris notes) — The Boost Lab (vendor article; read 2026-10-15; search excerpt only)

  “the screens do not belong on any turbocharged EJ”

Summaries are in our own words. Not repair instructions; consult the factory service manual.