2013 Ecoboost 3.5L F-150 FX-4 with 130K one-owner miles. It's my second new Eb and likely my last, but I have to fix it before I can sell it.

The truck began displaying a message on the Navigation screen that said something like "Shutting down process to save battery power" when the engine was turned off. It began running erratically shortly after I noticed the warnings. Occasionally it wouldn't start, even though it seemed to crank just fine. When it does run, it often seems like it's in a "limp home mode". 

I suspected a bad battery or alternator or both because when it doesn't start a jump start usually gets it going. Once the battery was even dead, after an extended period of disuse, but it took a charge, started and ran, though poorly. I've had the battery load tested and the alternator checked in two service locations, one of which was the reputable place I'd purchased the battery just about two years ago. That guy said that there seemed to be nothing wrong with the battery or charging system and that he could sell me another battery but didn't think it was bad. He suggested I clean the terminals well and maybe look for bad grounds.

I bought a new positive battery cable end from Rock Auto and, with a battery saver connected, replaced the positive cable end and cleaned the negative terminal as well. There were no improvements.

I have a USBII dongle that works with an app (named Piston) on my smart phone, and, using it, collected the trouble codes below.

P0010 Confirmed Description not available.

P0013 Confirmed Description not available.

P0020 Confirmed Description not available.

P0023 Confirmed Description not available.

P0135 Confirmed Subsystem - Fuel and Air Metering.

P0141 Confirmed Subsystem - Fuel and Air Metering.

P0155 Confirmed Subsystem - Fuel and Air Metering.

P0161 Confirmed Subsystem - Fuel and Air Metering.

P0155 Permanent Subsystem - Fuel and Air Metering.

P0443 Permanent Subsystem - Auxiliary Emission Controls.

P0446 Permanent Subsystem - Auxiliary Emission Controls.

I erased the codes and scanned again and got the same or similar results. I then took the truck to two separate mechanic friends (on two separate occasions/locations) who rescanned the codes, got the same results in both cases as I had gotten, but had no good ideas regarding what was going on--although one of them is researching the problem further.

I did some of my own internet research, but I gave up when I found no definitive answers. I could guess better than the stuff I was reading.

I'm retired [read "poor"] and I'd like to do the work to fix this thing--I've been wrenching my own stuff longer than Scotty has been a mechanic--but I'm from the old school before computer controls and high-end electronics. If I can make it run like the scalded dog it once evinced, I'll sell it immediately or maybe take it the next day and trade it for a used Tacoma, even if I have to take a loss.

Thanks for any advice you can pass along; sorry this turned into an essay. I really enjoy watching and listening to Scotty. It's obvious that he and I came from the same era and know a lot of the same things. I hope he persists for years and years to come.

Mark Rountree