# 05 volvo s40 hesitating or losing power?

**URL:** <https://community.cartalk.com/t/05-volvo-s40-hesitating-or-losing-power/66963>\
**Category:** Maintenance/Repairs\
**Created:** [August 8, 2011, 8:36pm UTC](https://community.cartalk.com/t/05-volvo-s40-hesitating-or-losing-power/66963 "2011-08-08T20:36:20Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![SnowAK11](https://avatars.discourse-cdn.com/v4/letter/s/41988e/32.png) [@SnowAK11](https://community.cartalk.com/u/SnowAK11)\
**Post date:** [August 8, 2011, 8:36pm UTC](https://community.cartalk.com/t/05-volvo-s40-hesitating-or-losing-power/66963/1 "2011-08-08T20:36:20Z")

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the s40 has been taken to the dealer and they do not know what is wrong. no codes. no check engine light. i had the transmission flushed, software update, injectors flushed, new spark plugs, turbo control valve changed. problem still exists! now this ‘loss of power’ happens more when accelerating from a stop/near stop but it also occurs when traveling at a constant speed. any ideas?