# 2003 Buick LeSabre P1811 code **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** lesabre, buick\ **Created:** [October 26, 2020, 12:23pm UTC](https://community.cartalk.com/t/2003-buick-lesabre-p1811-code/171594 "2020-10-26T12:23:41Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![lesabre](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/lesabre/32/17221_2.png) [@lesabre](https://community.cartalk.com/u/lesabre)\ **Post date:** [October 26, 2020, 12:23pm UTC](https://community.cartalk.com/t/2003-buick-lesabre-p1811-code/171594/1 "2020-10-26T12:23:41Z")
transmission hard shifts code is p1811 , so far cleaned MAF sensor added Lucas fix , if it happens again can I add 2oz OF SHUDDER ,I erased all codes and its OK going on 3 days ? ---
**Author:** ![Purebred](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/purebred/32/46796_2.png) [@Purebred](https://community.cartalk.com/u/Purebred)\ **Post date:** [October 26, 2020, 2:10pm UTC](https://community.cartalk.com/t/2003-buick-lesabre-p1811-code/171594/2 "2020-10-26T14:10:35Z")
That **might** buy you some time. But I suggest you watch the video from Mac Gyvers Workshop on a possible fix. I would not attempt it myself, but would find an independent transmission shop, **not** a chain store. ---
**Author:** ![Cougar](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/cougar/32/21348_2.png) [@Cougar](https://community.cartalk.com/u/Cougar)\ **Post date:** [October 27, 2020, 9:29pm UTC](https://community.cartalk.com/t/2003-buick-lesabre-p1811-code/171594/3 "2020-10-27T21:29:49Z")
The trouble may be with the solenoid. ---
**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:** [October 27, 2020, 9:32pm UTC](https://community.cartalk.com/t/2003-buick-lesabre-p1811-code/171594/4 "2020-10-27T21:32:15Z")
> **[P1811: Maximum Adaptive and Long-Term Shift Times OBD-II Trouble Code](https://www.transmissionrepaircostguide.com/p1811/)** Tester ---
**Author:** ![lesabre](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/lesabre/32/17221_2.png) [@lesabre](https://community.cartalk.com/u/lesabre)\ **Post date:** [November 22, 2020, 9:37am UTC](https://community.cartalk.com/t/2003-buick-lesabre-p1811-code/171594/5 "2020-11-22T09:37:03Z")
2003 Buick Lesabre 3800 V6 70K only on it. it comes and goes, it seems when the engine is hot normally on a log days run it starts with the hard shifts, however when I go real slow and slightly step on the gas at say 3-5 MPH I hear a slight engine compartment rattle like a PCV valve in which I took out and cleaned like new , it did this before I cleaned it also . I cleaned the MAF sensor the MAP sensor. in neutral rolling and revving the engine a little it don’t make the noise only when put back into drive gear. what can this be with no engine check light yet. and when I do not hear the rattle noise it shifts smooth ? .