TSBs

Subaru Oil Leak

June 11, 2021

This bulletin applies to some Subarus with FB engines.

This bulletin applies to 2013-2019 Subaru BRZ, 2015-2019 WRX, 2014-2018 Forester Turbo equipped with FA engine, 2013-2019 Legacy and Outback, 2012-2019 Impreza, 2013-2019 Crosstrek and 2011-2019 Forester equipped with FB engines.

A new active valve control system (AVCS) oil control solenoid valve (OCV) features a redesigned internal oil seal. The new seal will eliminate potential oil seepage into the valve’s wire harness connector. If oil seeps into the connector, the check engine lamp will illuminate and set various AVCS-related DTCs.

New OCVs can be identified by their production lot number located on the face of the solenoid.

OIL CONTROL VALVE ASSEMBLY

NEW P/N OLD P/N

10921AA231............ 10921AA230

10921AA241............ 10921AA240

10921AA23B........... 10921AA23A

If oil is found in the wire harness connector during the diagnosis of AVCS-related DTCs, replace the affected OCV with a new part number.

The production number of an OCV can be found on the valve face.

About the Author

Mike Mavrigian | Motor Age Editor

Mike Mavrigian has written thousands of automotive technical magazine articles involving a variety of specialties, from engine building to wheel alignment, and has authored more than a dozen books that crisscross the automotive spectrum. Mike operates Birchwood Automotive, an Ohio shop that builds custom engines and performs vintage vehicle restorations. The shop also features a professional photo studio to document projects and to create images for articles and books.

About the Author

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