# Subaru Outback 08 shuddering while idle

**URL:** <https://community.cartalk.com/t/subaru-outback-08-shuddering-while-idle/185143>\
**Category:** Maintenance/Repairs\
**Tags:** outback, subaru\
**Created:** [July 9, 2022, 12:36am UTC](https://community.cartalk.com/t/subaru-outback-08-shuddering-while-idle/185143 "2022-07-09T00:36:22Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Zach.yaguda\_181453](https://avatars.discourse-cdn.com/v4/letter/z/47e85d/32.png) [@Zach.yaguda\_181453](https://community.cartalk.com/u/Zach.yaguda_181453)\
**Post date:** [July 9, 2022, 12:36am UTC](https://community.cartalk.com/t/subaru-outback-08-shuddering-while-idle/185143/1 "2022-07-09T00:36:22Z")

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This morning I went to start my car and the battery was dead. I called AAA and ended up replacing it because it was 7 years old. Started driving and noticed the car shuddering while idle. My AC stopped working for a few minutes while idle as well. Fast forward to this evening, I drove about a mile or so and while idling it started shuddering and the AT Oil temp light turned on for a second then off. It did this a few times all while idling. While driving, i haven’t had any issues. Any ideas of what might be going on?

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**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\
**Post date:** [July 9, 2022, 1:37am UTC](https://community.cartalk.com/t/subaru-outback-08-shuddering-while-idle/185143/2 "2022-07-09T01:37:19Z")

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The vehicle computer may be going thru a relearn procedure.

[https://www.aa1car.com/library/battery\_disconnect\_problems.htm](https://www.aa1car.com/library/battery_disconnect_problems.htm)

Tester

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**Author:** ![George\_San\_Jose1](https://avatars.discourse-cdn.com/v4/letter/g/e5b9ba/32.png) [@George\_San\_Jose1](https://community.cartalk.com/u/George_San_Jose1)\
**Post date:** [July 9, 2022, 11:06pm UTC](https://community.cartalk.com/t/subaru-outback-08-shuddering-while-idle/185143/3 "2022-07-09T23:06:24Z")

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The relearn idea above would explain the shuddering and no A/C until the relearn is complete, but seems unlikely to explain the AT oil temp warning. Suggest to keep an eye on that, and if it returns let a shop take a look at it. Over-temping an automatic trans for an extended time will damage it.