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Old 05-09-2021, 09:11 PM   #627
MatthewAMEL

 
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Drives: 2023 CT5 Blackwing
Join Date: Sep 2016
Location: Orlando
Posts: 1,619
Quote:
Originally Posted by DaveC113 View Post
I'm taking my car in for a 2nd time next week to have the battery tested.

A few months ago I got a warning on the dash, followed by a slow crank on a cold morning. The battery's voltage was low, it was about 50% discharged, but it took a charge and passed the dealer's test.

Since then I bought a CTek battery charger and have been using it regularly, the battery loses charge and hence voltage over time for sure. At a certain point it's going to cause issues with the car's electronics and imo it could explain the rear diff issue.

If the dealer doesn't replace the battery I'll probably just buy an Optima and charge it monthly with the CTek in hopes of it lasting longer.

These cars get really flaky when voltage is low. IMHO, the heat in Florida kills them pretty quick (i'm on my 3rd) and the car starts to exhibit random annoyances. I have a NOCO now that I will use on mine from time to time.
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