lolder

This sub topic thread is for 2010-12 FFHs which have a lifetime engine air filter that is quite difficult to replace.

Time to junk this car. None of the problems are common. It's been wrecked twice.

Despite the heading for Ford fusion Hybrid the list is a generic one. For instance it refers to an automatic transmission which the FFH does not have. Was the filter dirty?

There is no readily serviceable air filter on the 2010-12 FFH. It's buried in the compartment and it's supposed to be lifetime anyway. It's not clear what you replaced. I doubt that Ford looked at the filter. You were scammed.

If temperature is normal thermostat is not stuck. The noise you hear may be a nosy electric vacuum pump which Ford is famous for. Mine was noisy for two years before someone rear-ended it and totaled it. If there are no warning codes drive it.

Where is the debris coming from in gear oil? Oil molecules do not break down under normal use. They can burn (oxidize) but that requires a lot of heat which is not present in the eCVT. There are very few sources of friction in the eCVT. Let's also argue what are the best boat anchors.

These eCVTs are not like ordinary manual or automatic transmissions. There is hardly anything to wear, no clutches, bands, belts, valves, shifters, torque converters. It's only gears rolling on continuously engaged gears. I do not think metal particles remain in suspension in oil very long. I've never heard of that function. Oil gets dirty from blow by but the eCVT transmission fluid is not susceptible to that. It burns if hot enough but that doesn't happen in the eCVT either. This is a sealed unit that requires no service unless it leaks. Oil never wears out. Lets talk religion next.

You need to have the software fix described here. https://www.fordfusionforum.com/index.php?app=forums&module=forums&controller=topic&id=19361 There's probably nothing wrong with your HVB. If you can't do it yourself, print out the beginning of this thread and take it to the Dealer. It's a 15 minute job for them.

Happy result !

No. The 12 vdc does not start the ICE, the HVB does. You are not getting the HVB back on line. This is dangerous work fiddling with the HVB. You may have blown the HVB fuse. You disconnected both batteries so it's unknown what reset is required. The HVB is not user serviceable.

The hybrid is the BMW i3. Low reving engines weigh too much. It costs about as much as a long range Tesla Model 3.

Not true. 2010-12 eCVT failures are almost unheard of. They were built by Aisin in Japan. 2013+ eCVTs were built by Ford and early ones had faulty bearings that no amount of fluid changes would prevent damage. MeeLee you are wrong.

No they don't.

It might be months before Ford can fix the airbags. Drive the car and don't get in to any front end accidents. That's a lot under your control by the way you drive.

The Ford eCVT should require no maintenance. The bearing failures were not due to dirty oil but manufacturing defect.