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Ok So I have been tracking a parasitic Drain for the past 2 months or so. What I found is that when I park the car, turn ignition off and set lock the doors, I will leave it for 2-3 hours and then I would get a 12v Battery is low notification from the app. After numerous times of the battery draining and having to jump the car to get it going agian I have tried something that has eliminated the drain so I am hoping to get some feedback from the crowd here on potential problems.... I have replaced the coolant pump as the first place I looked and the water in the connector was an issue so I replaced both. If I pull fuse 71 (10amp) (Heating control head (manual air conditioner), Climate control module) in the fuse panel below the glove box the battery is stable and lasts overnight at 12.0. (I am pretty sure the battery has sulfated after many drains down to 8.0) When I put the fuse back in and leave it, the drain comes back. Is it a module or is it the climate control panel? I see in Forscan that there is an option to reset modules? Anyone think this would help? Thanks, Corby

Ok, Again, thank you for your input as always. Very much appreciated by me and others!

There is a PID (parameter identification code) for virtually all stored data in the car. With the FORScan App and an appropriate OBDII adapter one selects the 12 V Battery State of Charge PID and then initiates FORScan to scan all selected PIDs in FORScan. Your Energi has a separate converter (not the main DCDC converter) which should charge the 12 V battery when you are plugged in and charging your Energi.

Hey Plus. I am still having similar problems with my Battery draining. In Forscan, How can one check the SOC of the battery? I was wondering if you could send me the link where you explained how to reset the battery age perameter in my 2013 Cmax Energi. I am considering replacing my batter but your explanation in your previous post makes me think I should try charging the battery up before getting a new one. Current battery is 3 years old. Thanks!

So what size charger do you have? If your battery has 0% SOC <= 10.5 V by definition (8.5V) and if you charged for one hour and SOC = 100% as you say, then the charger had to put out 43 A for one hour. 100% SOC = 43 Ah for the BXT67R Motorcraft battery. Because your battery is around 5 years old (2015 MY?), it’s maximum capacity will be less than 43 Ah. You got 12.1 V after allowing surface charge to drain which is a maximum SOC of around 30% +- maybe 10% depending on load on battery when you checked voltage. This would mean that if you charged for one hour you likely added between 8 - 16 Ah of capacity (8-16 A charger) to your battery. IMO, this is normal for a 5 year old battery. See attached discharge curve. C = 43 Ah, so the C /20 discharge curve is likely the one to use when measuring battery voltage. Just opening doors activates modules and puts load on battery. Driving the C-Max adds little to the SOC of the battery. In 25 minutes of driving you will likely add less than 2 Ah and more than likely around 1 Ah. So, best case is you might have increased SOC around 5%. Normal car off battery drain should be less than 50 mA. So if car is off for four days, normal max. drain would be around (96 h x 0.050 A) = 4.8 Ah (should be less unless there is a parasitic drain). I believe around 30 mA would be typical. Thus, the four day Ah drain would be around 3 Ah. This 3Ah drain is still greater than the charge put back in 25 minutes of driving.