P1378. After new atlas 40 FICM tune truck threw this code. I cleared it and it's hasn't come back. But after searching that code on the web it's related to FICM low voltage. Tonight I was bleeding air out of radiator (per Mishimoto suggestion, see other post for story) and noticed my battery volts at idle is 11.3-11.6. Driving its 13.1-13.4. Am I correct this is low? Batteries we're put in in 2010 at 70k. That's when FICM was replaced by ford. Are they shot? On a positive note after a 30 mile test drive ECT mostly ran 196-200. Only hit 204 when driving up the hill home. Seemed to help a bit. Thanks guys, hope everyone is doing well.