I just bought this used 2012-tl/tech. I noticed a low battery message and the dealer said it was caused by a sensor. They told me they replaced the sensor. The message disappeared from the display. Today, I noticed a message in the INFOR display that "Battery management system may not operate" "call your dealer" It also displays a date when the above message was generated, which is exactly when I brought the car to the dealer to check the low battery issue.

Any idea please? I am concerned that the dealer did not replace the sensor but just disabled the Battery management system (message display)

 

I didn't even know we had a battery sensor. I think it's just the battery itself that needs to be replaced. Apparently OEM batteries are known to go easily.

 

thanks Andrew. The battery was replaced in Sept. last yr (less than 6 months). is there anyway you can update the battery management sys?

 

That is a new feature in newer TLs.

2012 Acura TL - Powertrain - Honda.com

 

There is a TBS (12-013) that updates the software for the battery sensor. It did not apply to my car which I bought Sept 2012 so I assume it was for early 2012 model year production. See attached.

TSB 12-013 Applies To:
2012 TL 2WD – From VIN 19UUA8...CA000001 thru 19UUA8...CA008239
2012 TL SH-WD – From VIN 19UUA9...CA000001 thru 19UUA9...CA002516

 

Thanks Reorge. I took my car to the dealer this afternoon. Based on what the tech told me, he basically reset (updated) the battery management system. I assumed he used the procedure as you described to update the system. Now that warning message is gone.
By the way, my car was manufactured in 8/2011 (2012 model).