Service Repair

Subaru Corrects False DTC

July 2, 2021

This bulletin applies to 2010-2017 Subaru Legacy and Outback, 2014-2017 Forester, 2012-2017 Impreza, 2013-2017 Crosstrek and 2015-2017 WRX vehicles.

Information courtesy of Mitchell 1

Mike Mavrigian

This bulletin applies to 2010-2017 Subaru Legacy and Outback, 2014-2017 Forester, 2012-2017 Impreza, 2013-2017 Crosstrek and 2015-2017 WRX vehicles. A new transmission control valve assembly is available to prevent false detection of DTC P0841 and/or illumination of the AT temp light.

Testing has revealed, in some cases, air bubbles (aerated fluid) may enter certain pressure circuits within the control valve assembly, causing fluid pressure control and adjustment to be calculated incorrectly, resulting in the DTC. The shape of these circuits has been changed to prevent this occurrence.

About the Author

Information courtesy of Mitchell 1

Information for Technical Service Bulletins comes from ProDemand, Mitchell 1's auto repair information software for domestic and import vehicles. Headquartered in San Diego, Mitchell 1 has provided quality repair information solutions to the automotive industry since 1918.

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.