Subaru Reports Software Glitch

In the interest of customer satisfaction, Subaru is initiating a service program to reprogram the ECM on certain 2019-2020 Ascent and 2020 Legacy and Outback vehicles. 

In some vehicles, the current software may cause the sub learning value control to operate improperly during the wake-up mode of the ECM. This could cause repeated erroneous  learning of the accelerator position, which can result in the disabling of the VDC function. 

When the VDC function is disabled, EyeSight, Reverse Automatic Braking (RAB) and Electronic Parking Brake (EPB) auto release functions are disabled by the VDC fail signal, causing the VDC, EyeSight, RAB and EPB warning lights to illuminate. 

ECM reprogramming will be required.

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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 | Editor

Mike received a BA degree from Youngstown State University in English Literature with a minor in Journalism in 1975.