Automate

This is for an 2008 Escape Hybrid but its the same fault code and turned out to be the throttle valve https://mechanics.stackexchange.com/questions/41809/2008-ford-escape-hybrid-stop-safely-now-p1a0c Here is one that ended up being the purge valve

You also need to consider the other things besides the TSB that are suggested for repairing P1AOC "Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins"

As far as reading from the modules the Lite versions of FORScan can read everything the full version can. The difference is the Windows version can write to modules to change settings and to put the modules into self test / diagnostic test modes. The dealer could have cleared all the fault codes from the modules so there is no guarantee they are still stored in the modules.

What software did you use with your OBDII module? I would suggest FORScan.org When I search "P1AOC" I see: Faulty Hybrid Powertrain Control Module Hybrid Powertrain Control Module harness is open or shorted Hybrid Powertrain Control Module circuit poor electrical connection Read more: https://www.autocodes.com/p1a0c_ford.html Nothing about the vapor canister except in the TSB but it mentions some other codes that should show up

https://www.fordfusionforum.com/index.php?app=forums&module=forums&controller=topic&id=19361

Yes

There might be some risk if you used ForScan to reset the battery age all the way to zero. Obviously a battery does degrade over time. Its just a matter of how much. The original firmware was too conservative and protected the battery too much. But when you use ForScan to set the battery age to zero you are saying you have brand new battery with all the capacity that comes with a new battery. The battery aging feature of the firmware was there to protect the battery as it gets weaker with age. So, after resetting the age with FroScan to zero, there is a risk you could over stress the old battery and cause it to fail completely where your car would not move or run. Although I have not heard of this happening to anyone. We just don't know how big this risk really is. I chose to reset my battery to 6 years old with Forscan. That still made a big difference in the way the car drives but I don't know how much of a difference it is from 0 years. In theory, now that the batteries are 10+ years old, Ford could actually measure how much the batteries have degraded and put the proper factor into the new TSB firmware. On the other hand, how much effort are they going to put into firmware of 10+ year old vehicles?

The ForScan change is very simple. All it does is tell the computer the battery is a young battery. The original module firmware improperly assumed the battery would be severely degraded after 9+ years. This turned out to be untrue. The original firmware limits how much power can be drawn from the old batteries. The TSB fixes the firmware so it does not assume the battery is so weak when it is 9+ years old. One should be able to reset the car module battery age back to the true battery age using ForScan either before or after the TSB.

How long has it been doing this? It may be doing an automatic battery reconditioning

Sounds like the battery. You could check the voltage when the car is on to make sure the DC to DC module is charging the 12v battery.

That is a good question. Below is what Forscan shows for my 2010 that has NOT had the TSB applied. Not sure why it's showing no known upgrades for the Powertrain Control Module. Hopefully someone who has had the upgrade will post theirs.

An owner can also check the firmware version of their BECM and PCM modules using free Forscan software https://forscan.org/home.html and a cheap OBDII adapter.

Forscan can't currently do a re-balance on 2010-2012 Fusion Hybrids. It does support re-balance on older Escape Hybrids. The developers are working on adding this functionality to the Fusion.

It is a combination of battery age and battery "health" The car's computer monitors the battery health by looking at the variation in voltage in each section of the battery. When the voltage in different sections of the battery starts to become unequal, the computer says the battery is degrading and will limit how much power is drawn from the battery. A re-balance may rejuvenate the battery health but it can't do anything about the battery age.

From 2010 Fusion Hybrid Warranty Guide (dated June 2009). Other states may have changed their laws since then. "Vehicles Eligible for Standard California Emission Warranty Coverage Standard California emission warranty coverage applies if your vehicle meets the following two requirements: • Your vehicle is registered in Pennsylvania, Oregon and Washington, and • Your vehicle is certified for sale in California as indicated on the vehicle emission control information label. (NOTE: Oregon has adopted the California AT PZEV battery warranty (10 yrs/150,000 miles) in addition to the standard California emissions warranty coverage that applies to all emissions components. Otherwise, vehicles in Pennsylvania, Oregon, and Washington do not receive the California AT PZEV extended emission warranty coverage.)"