# '08 LaCrosse throttle behavior

**URL:** <https://community.cartalk.com/t/08-lacrosse-throttle-behavior/79413>\
**Category:** Maintenance/Repairs\
**Tags:** lacrosse, buick\
**Created:** [May 20, 2013, 12:18am UTC](https://community.cartalk.com/t/08-lacrosse-throttle-behavior/79413 "2013-05-20T00:18:40Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Weevie](https://avatars.discourse-cdn.com/v4/letter/w/3ec8ea/32.png) [@Weevie](https://community.cartalk.com/u/Weevie)\
**Post date:** [May 20, 2013, 12:18am UTC](https://community.cartalk.com/t/08-lacrosse-throttle-behavior/79413/1 "2013-05-20T00:18:40Z")

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Recently bought an '08 Buick LaCrosse w/92k miles. It accelerates normally up to about 15% pedal position, then it stops increasing from 15 to about 30%. If you play with the gas, the engine does not respond. Once you get to 30%, it downshifts and powers up. My theory is that the APP (Accelerator Pedal Position) is worn or shorted, and gives a faulty signal in the 15 to 30% range, having to use the default last valid reading. I have read that some sensors can fail within the valid range and not give a fault reading on the OBD. Sound about right?