P1092

P1092 is a Subaru AVCS code meaning the bank 1 AVCS solenoid is mechanically stuck — distinct from P1086/P1087, which are angle-deviation codes. P1092 indicates the OCV (oil control valve) itself failed to respond to commanded duty cycle changes at all, suggesting the spool valve inside the solenoid is physically jammed by varnish, debris, or a broken internal spring. The ECU sees zero cam-position change in response to a full 0-100% duty sweep and flags the solenoid as mechanically failed. Cheapest-first ladder: (1) Pull the bank 1 OCV (passenger-side cam cover on most EJ engines, intake-side on FA/FB). It's a single 10mm bolt and a connector. (2) Inspect the inline oil screen — a fully clogged screen mimics a stuck solenoid because no oil reaches the spool. Clean with brake cleaner and compressed air. (3) Bench-test the OCV: 12V on the solenoid pins should produce an audible click and visible spool movement. No movement means the solenoid is mechanically toast. (4) Resistance-check: 6.9-7.5 ohms cold for EJ-series, slightly different for FA/FB — out-of-spec confirms electrical failure inside the winding. (5) Most expensive: if the OCV is good and the screen is clean, the AVCS hub or phaser itself is mechanically stuck (vane seized in the housing), which requires timing belt or chain removal plus phaser replacement. Don't order a $300 OCV before pulling the screen — half the P1092 codes Brian's seen on neglected EJ25s clear with a brake-cleaner flush of the screen and a fresh oil change.

Vehicle-specific patterns: 2005-2012 Subaru Forester/Outback/Legacy/Impreza EJ25 SOHC is the dominant P1092 platform — the OEM OCV (Subaru P/N varies by year) uses a fine-mesh screen that clogs catastrophically when oil change intervals stretch past 7,500 miles, and the spool seizes from varnish at 90,000-130,000 miles. 2008-2014 Forester XT and WRX/STI turbo EJ255/EJ257 see P1092 from heat-soak fatigue on the OCV winding (turbo oil is hotter and breaks down faster) — the solenoid clicks audibly but the spool sticks midway. 2013+ FA20 in BRZ/WRX uses a different OCV design but still suffers spool sticking from the engine's notorious oil-consumption issue dumping carbon into the oil. 2011-2018 FB25 (Forester, Outback, Crosstrek 2.5) sees P1092 less often, but when it appears it's usually paired with a P0017 or P0021 cam correlation code indicating the AVCS hub itself has failed mechanically rather than just the solenoid. Estimated repair: $80 (DIY clean + oil) to $1,400 (OCV + AVCS hub on FA20 turbo with labor).