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October 21, 2013 Service bulletin

A countermeasure thermostat has been released to address a rare condition which may occur during engine...

Subaru technical service bulletin 09-56-13 for 2013-2014 Subaru Outback, 2011-2014 Subaru Forester and 2013-2014 Subaru Legacy and others.

Bulletin number
09-56-13
Component
Equipment: appliance: air conditioner
Summary
"a countermeasure thermostat has been released to address a rare condition which may occur during engine soak in cold ambient temperatures. In these rare cases, after an extended cold soak, coolant may enter the thermostat’s internal piston. If this occurs, the thermostat may open at a temperature which is lower than specified and cause dtc p0128 to be stored in the ECM memory."

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