Hybrid Battery Pack Sudden Death

[greylin]

Hey everyone, i am new to the forums. I own a 2014 FFH and everything was going great until one night I go to hop in my car to go to the store and i was bombarded by warning lights and the car telling me the EV mode wasn't working. The car reads that the Hybrid Battery holds no charge and when the car is on it is always running the engine. There were no signs of a failing battery prior to this. My MPG was average for what I was getting for almost 2 years of driving. Everything was reading normal. I have 125xxx miles on the car. I was wondering if anyone had any insight on the issue. Is it probably a bad sensor or do you suspect that I really will need to get a new battery. 12V battery is GOOD by the way.

 

Thank you

[murphy]

If the hybrid battery had no charge it would be impossible for the engine to start. The car does not have a traditional starter motor or an alternator for that matter. One of the traction motors is used to turn the engine over and they run from the high voltage battery.

 

Multiple errors are most likely caused by a failed ground connection.

[greylin]

So you are saying that a failed ground connection is most likely the cause of the problems? Would that be a simple fix to find and resolve?

[murphy]

So you are saying that a failed ground connection is most likely the cause of the problems? Would that be a simple fix to find and resolve?

There are many ground connections in the car. The modules communicate with each other over a data bus. If just one module has a bad ground it can corrupt the data bus and the result is garbage on the bus. It takes test equipment to analyze the bus to see what is going on and isolate the problem module. This is not a job you are likely to be able to do yourself.

[greylin]

There are many ground connections in the car. The modules communicate with each other over a data bus. If just one module has a bad ground it can corrupt the data bus and the result is garbage on the bus. It takes test equipment to analyze the bus to see what is going on and isolate the problem module. This is not a job you are likely to be able to do yourself.

Any idea on what the dealership would charge to fix it?

[murphy]

Any idea on what the dealership would charge to fix it?

I have no idea.

[expresspotato]

Get an bluetooth OBD scanner and ForScan light for Android or full for a windows laptop. Read the codes. Pull out the orange service plug and put it back in. Pull the 12v battery and put it back in.