OK so I just bought my 13 journey 3.6, traded a 12' Avenger 3.6. So its been below zero here and my avenger barely started in the morning when Larked outside overnight. Had it at dealership, they said nothing wrong with it! I said a 525 CCA battery is not big enough for a V6 at these below zero temps! So I traded off for my journey due to my car not being big enough, journey does the exact same thing! So I went and bought a Optima battery 800 CCA, changed it and the battery sensor broke off! Grrrrrrr. I have been getting a low voltage pending code on both vehicles (before broken battery sensor). What does the sensor due? Is it OK to drive till I get a new one?