I have a 2010 Fusion Hybrid. The EV will not turn on at 40 MPH or under but will during HWY use. That battery is charges normally. Is that a sign the battery is going bad?

What is your question?

The car will not switch to EV mode at a stop or backing up. The green indicator is on and once in awhile the EV indicator comes on but the moment I take my foot off the brake the EV shuts off. I have 210,000 miles on my car, this just started happening a couple of weeks ago. I thought is was the weather but the weather has since become unseasonably warm and the EV will still not come on once the car is completely warmed up and I am driving under 45 mph. I do see it assist at HWY speeds. I have it at a dealer now, but I don't have a great deal of confidence in them based on other problems they attempted to fix but couldn't until I researched and steered them in the right direction.

What makes this problem better or worse?

No

How long has your 2010 Ford Fusion had this problem?

2-3 weeks