Red Triangle of Death

I know that there are several threads about this cursed triangle but none that I have found so far match my symptoms that I have found anyway. I will start at the begining. At 212,000 or so miles my ABS light came on took it to a garage to check it and was told the ABS pump needed replaced. I changed the ABS pump out and when I put everything back together I started having trouble. we go the red triangle the check engine light and the circle with ! and it would not start. found that battery had been so wet for so long that the terminal was coming off. So I put a new yellow top in. started the car and not lights got around the block and bang red triangle back on. took it to get the codes read and it would not even communicate. re set tightened battery cables and same thing good for a little bit then right back on.
took the hybrid battery out and checked the cells and I had a bad cell so I replaced it and put it back in the car started it up and went to test drive it and got about 10 miles and the there was a bang in the back that sounded like something had hit the battery cover this had also happened before we took the hybrid battery out. As I drove the red triangle and it little friends came back on so I started home but then the hole car sort of stuttered for a second and I lost power I could still go just the motor revved way up and I barely moved. I stopped and turned it off and back on gain and it still had the lights on but had normal power again drove about a mile and lost power again. I noticed when it did this that the car showed power going the the electric motor but not to the hybrid battery. As a side note this same thing happened before I touched the hybrid battery.


Any help or advice you can give me would be greatly appreciated.

 

what is the traction battery? is that the hybrid battery or another battery??

 

could it be the ECU on the side of it because all of the cells have good voltage. and the ready light comes on ?? hoping to not have to spend more on one part than the car is worth

 

It did it before I took the battery out and everything looked normal just a cell with low voltage. I have not taken it back out of the car since it happened again last night

 

I am starting to think that a stick of dynamite is the way to go .

 

I agree I do know that the battery is modules are tight and bolted down. I am at a loss as to what it could be from I guess that I will try the cheap way and try a new ecu because I dont know that I can justify buying a hole new HV battery

 

I do not have a tester the guy at autozone could not get their reader to communicate to pull a code. I will see about getting a reader what is a recommended brand.

 

Yes it is secured to the car with all the mounting bolts and brackets tight. I am begining to think that it is more of an inverter coolant pump and the bang sound I heard was one of the relays. as soon as it happened the battery cooling fan kicked on super high.

 

I am in the Tampa area I am 50 miles North of Tampa Bay in Brooksville

 

That would be awesome if you have the time I cant get it to his shop it does not drive right and not trailer. I would gladly pay you to read the codes whenever you can I am tied up all weekend but I am tied up at home where the car is and can stop working on the boat to mess with the car anytime you are able.