2011 LaCrosse owner
Sustaining Member
- Joined
- Sep 9, 2025
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- 1
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- Location
- Oregon
- Buick Ownership
- 2011 Buick LaCrosse CXS
January 2024 I purchased a 2011 Buick LaCrosse CSX from a private party with 26,300 miles. There were two issues that needed attention per my local Buick dealer: the amplifier and passenger rear view mirror motor which adjusted the position of the mirror were faulty. The dealer indicated the parts were no longer available.
After a couple months I located a local auto repair shop which specialized in electric/electronic issues and they were able to secure a replacement amplifier and mirror.
In June 2024 at 28,676 miles, I attempted to start the car with foot on brake and pressing start button, nothing happened. Not knowing what to do I placed the FOB closer to the start button and finally in desperation I pressed the FOB lock button, heard a loud click in the driver door and the car started. Thinking it was a low battery in the FOB I replaced it.
In January 2025 at 35,166 miles I started getting momentary flashing messages in the DIC "Service Supension System" and "Service AFL Lamp". At that time I returned to the auto repair shop and we cleared the history of many codes and only BO223 and BO300 returned.
I continued to drive the car, enjoying its comfort. However, I still continued to have momentary times when the car would not start. I would get various flickering messages on the DIC from "Service Suspension System, Service AFL Lamp, Service Parking Assist, Open and close driver's window and more." After additional non start moments, I returned the car to the auto repair shop (May 29, 2025, 39,748 miles) and they repaired a couple grounds which they indicated would cause low voltage which would trigger the DIC messages. On a subsequent visit
they replaced the battery due to what they described as internal short. After a few days of road test they returned the car.
But the issue continued. Finally in July 9, 2025 at 41,383 miles I returned the car and this time they indicated there was alternator with low voltage at times and replaced the alternator. Upon return the car worked flawlessly for 2 solid weeks. I was beginning to have confidence I could use the car without fear of being able to return home.
Then the problem returned. I could no longer lock/unlock the car with my thumb pressure, I had to use the key. When the car would not start, I would sometimes press the FOB lock button, hear a loud click in driver door and the car would start. Other times there would be a continuous soft clicking sounds from the engine compartment but nothing would start.
For 3 weeks the car has sat in the driveway, when I last tried to start it, there were the continuing soft clicks from the engine compartment but the car will start. Now there are no noises. Yesterday, I attempted to slow charge the battery at 2 amps. When I placed the negative cable on the ground post, the horn started blaring.
In my last conversation with the auto repair shop, they are at a loss as to how to proceed.
I would appreciate any advice you may have to offer. It seems to me there is a malfunction between the FOB and some sensor in the system that is faulty and needs to reset for the car to start. One additional item. When the car fails to start, but finally starts, the DIC message always returns to the MPG message even though I have it set to Odometer/Trip 1 setting.
Thank you for reading this lengthy dialogue.
After a couple months I located a local auto repair shop which specialized in electric/electronic issues and they were able to secure a replacement amplifier and mirror.
In June 2024 at 28,676 miles, I attempted to start the car with foot on brake and pressing start button, nothing happened. Not knowing what to do I placed the FOB closer to the start button and finally in desperation I pressed the FOB lock button, heard a loud click in the driver door and the car started. Thinking it was a low battery in the FOB I replaced it.
In January 2025 at 35,166 miles I started getting momentary flashing messages in the DIC "Service Supension System" and "Service AFL Lamp". At that time I returned to the auto repair shop and we cleared the history of many codes and only BO223 and BO300 returned.
I continued to drive the car, enjoying its comfort. However, I still continued to have momentary times when the car would not start. I would get various flickering messages on the DIC from "Service Suspension System, Service AFL Lamp, Service Parking Assist, Open and close driver's window and more." After additional non start moments, I returned the car to the auto repair shop (May 29, 2025, 39,748 miles) and they repaired a couple grounds which they indicated would cause low voltage which would trigger the DIC messages. On a subsequent visit
they replaced the battery due to what they described as internal short. After a few days of road test they returned the car.
But the issue continued. Finally in July 9, 2025 at 41,383 miles I returned the car and this time they indicated there was alternator with low voltage at times and replaced the alternator. Upon return the car worked flawlessly for 2 solid weeks. I was beginning to have confidence I could use the car without fear of being able to return home.
Then the problem returned. I could no longer lock/unlock the car with my thumb pressure, I had to use the key. When the car would not start, I would sometimes press the FOB lock button, hear a loud click in driver door and the car would start. Other times there would be a continuous soft clicking sounds from the engine compartment but nothing would start.
For 3 weeks the car has sat in the driveway, when I last tried to start it, there were the continuing soft clicks from the engine compartment but the car will start. Now there are no noises. Yesterday, I attempted to slow charge the battery at 2 amps. When I placed the negative cable on the ground post, the horn started blaring.
In my last conversation with the auto repair shop, they are at a loss as to how to proceed.
I would appreciate any advice you may have to offer. It seems to me there is a malfunction between the FOB and some sensor in the system that is faulty and needs to reset for the car to start. One additional item. When the car fails to start, but finally starts, the DIC message always returns to the MPG message even though I have it set to Odometer/Trip 1 setting.
Thank you for reading this lengthy dialogue.
