Well, the saga continues. When I picked up my truck last week, I put a battery charger, 4.3 Amp CTEK - 40-206 MXS 5.0 Fully Automatic, on my new battery overnight to top off. I thought the charging voltages while driving around was kind of high, 14.3v, but apparently that is normal. Drove around several days, short trips, 5-10 minutes and one 30-minute trip. On my 3hr drive home charging voltage dropped to 13.9v. Set outside for two days without starting, I finally decided to hook up my OBD Scanner see if there where any fault codes, Even thou the check engine light went out the next morning after battery was replaced, I hooked up scanner and got this message “ATTENTION Low Battery Voltage”. Battery voltage was at 12.12v, 28%, Internal R=2400mOhm and 125CCA per my handheld TOPDON ArtiBattery101 Tester. But the truck fired right, no hesitation at all. I wanted to test drive my truck on the lawn to test my 4-wheel drive, Auto, Hi and Low to make sure it was functional. Due to the previous code, P1DF3 – Power Train System after I picked-up my truck. Along with it being towed, Front wheels in the air and steer wheels on the ground. 4-wheel drive seemed functional. After a short test drive, I hooked my TOPDON Tester backed up and the voltage read 12.69v 100%, 976 CCA 100%, Internal R=3.07mOhm Good Battery. 3-HOURS Later my NEW, on week Battery, was back down to 12.17v. Need to try a different method/location to hook-up my Clamp Amp Meter, other than the positive cable at the battery post. Hard to connect and to close to the body controller, can get different parasitic readings depending how I hold and rotate my clamp meter. Trying to determine if I have parasitic drain or bad battery. Probably would have just been better/faster to take battery out, charge and monitor for two days…
Additionally, my old Actron CP9145 is unable to clear reset fault code P1DF3.