HV Battery is Losing Charge Quickly

I just got a replacement - reconditioned HV battery. It suddenly started losing it's charge quicker than it is gaining a charge in normal driving. It is not throwing a code until it gets extremely low and then it threw a P3190 (Poor Engine Power). My 2 year old battery was failing with a bad Hybrid Battery Code. I called the Company that put in the reconditioned battery and they are saying that since it isn't throwing a code it needs to be diagnosed by a shop before they will replace the battery they just put in a month ago. I can't see how diagnostics for this issue would be easy/inexpensive. They are saying it could be the inverter or the 12V Battery.

I see the Green Charge Path at the bottom of the Energy Monitor much less than I see the Yellow Discharge Path at the bottom of the Energy Monitor. I charge the battery fully on the Energy Monitor and then drove 5 miles (60% Highway) and it discharged down to 3 bars total and the bars turned purple.

 

I am using the BlueDriver OBDII tool and Android App.

I feel that reading the Dynamic Data while the Vehicle is running would be helpful but I am not at all skilled with that type of analysis.

I did just drain and refill the Inverter Coolant. I let the bleeder run air bubble free for about 2 minutes.

I feel like the Code was the result of how quickly the Traction Battery is draining and it got down to possibly below one bar on the Energy Monitor. Last night I charge the battery (put the vehicle in Drive and push the accelerator to see the Green Charging path on the Energy Monitor) all the way to all green bars on the Energy Monitor. This morning it was still fully charged. My 2 mile drive to work depleted the charge down to 3 bars half way to my destination. I supplemented the charge by engaging the accelerator while stopped at a couple of the lights.

Am I focused on the wrong thing. Could the lack of charging be caused by the things suggested in the DTC - P3190? I do think that the Engine Coolant could be running hot. Just not sure how that would effect the charging system.

 

So, I am not trying to be difficult. You have both given me good information. I am just troubled by the fact that I only got the P3190 error once. And that is when the Traction Battery got down to 1 bar on the Energy Monitor (I think it might have dipped below 1 bar, it dropped at least 2 bars when I started to drive) .

If I am having Engine Performance Issues shouldn't I be throwing a P3190 code more than once and in different situations?

Again, the Battery discharged 7 bars in a 2 mile drive and no codes were given.

 

Does the DrPrius App look at ECU & ICE data as well?

I am having trouble trusting Dealers and Hybrid Shops. From what I have read Dealer Shops are very lazy about Troubleshooting and lean toward replacing expensive items rather than doing an in-depth analysis and research to see if I really need a $2500 HCU that will cost $2000 to install (Had two Ford Escapes that were an absolute nightmare abut giving good data and instead receiving expensive repairs). I know the Prius is better at giving dat but what if in my situation it is not? I shouldn't be weary of Hybrid Technicians but I currently am hyper-sensitive to their troubleshooting techniques.

My personal Troubleshooting skills are more toward PC's and Main Frame Computers. One of the main lessons I learned was "has anything changed or was anything new installed". I have a different Reconditioned Hybrid Battery from July 7th, 2021. And now it is rapidly losing charge. It could be the ICE but it is difficult for me to look past the fact that I just got a replacement Hybrid Battery.

 

Okay,

So, I have installed DrPrius and There were no stored codes. The only codes I have had is when the Energy Monitor in the Prius got down to below 1 bar (the bar stayed up but I could tell it had discharged beyond the 1 bar). That was a P3190 (again, never got this code when the battery was not fully discharged).

I did the following and the Battery still discharges very quickly at times;

Cleaned Throttle Body
Replaced Mass Air Flow Sensor
Replace Radiator
Replaced both Radiator cooling fans
Replaced cooling fan thermal switch
Replaced Inverter Cooling Pump
Had cooling System bled by Hybrid Tech with proper software
Had PCM software Recalibrated (upgraded)

The Hybrid Tech told the Office Admin that the Hybrid Battery is good but I didn't get to talk with him or find out what type of test he ran. I don't even know if he ran diagnostics while driving. I am having trouble finding a Hybrid Tech I trust and I definitely don't trust the Dealerships.

I started monitoring the battery while driving;

I can see the Hybrid Battery Voltage go from 220 Volts to 190 Volts (often happens when accelerating quickly)
I can see the Blade Voltage go down from 7.4V to 6V
I can see the State of Charge go from 52 % to 45%
All of these things happen in a second and turn that status Red
I can see the left 2 bars at the bottom go red

This all happens without throwing any codes!

I did a short recording of one of the events. I can try to upload if you would like.

The Hybrid Battery keeps its charge without any problems and I can charge it in 12 minutes if I am sitting with the brake on in Drive Mode and feathering the gas pedal.

 

FYI - My State of Charge went from 74% to 43% in less than a mile in a residential neighborhood with a 25 MPH speed limit and 3 stop signs. Not sure what kind of load that is putting on the battery or the engine. I can't see how this is not the Hybrid Battery?!

 

So, my Energy Monitor went from 8 Bars to 1 bar in one mile of residential driving and you are telling me not to worry? If I don't intervene this will go below these levels and throw a code that is not related to the Hybrid battery. All of the issues with that code have been addressed. My previous Batteries would NEVER go from 8 bars to 1 bar in one mile of residential driving!

The Hybrid Battery Voltage level is going to 190 Volts with 25 MPH driving and you are saying this is normal?

 

I never saw my other batteries go below 4 bars, ever (my old batteries would throw a Hybrid Battery Code and the Triangle of Death). Just driving 1.5 miles to the Church where I work. I also saw it go from 6 bars to 1 on an urban highway, route 52 in Indiana (never saw that before either). Suddenly after a replacement battery is installed I have trouble with extremely quick discharges and everyone thinks it's something besides my battery.

If you look at the Thread I have dealt with everything related to the P3190 code I have only gotten when the battery discharge below the 1 bar (it happened twice)

Cleaned Throttle Body
Replaced Mass Air Flow Sensor
Replace Radiator
Replaced both Radiator cooling fans
Replaced cooling fan thermal switch
Replaced Inverter Cooling Pump
Had cooling System bled by Hybrid Tech with proper software
Had PCM software Recalibrated (upgraded)

 

I have started to make sure it is up around 7 bars when I park. I do this by leaving it in drive and feathering the gas pedal.

When I start in the morning the ICE turns on and charges the Hybrid Battery for about a minute.

At Stop lights the ICE doesn't stop but I don't see a charge going to the Battery (on the Energy Monitor or in DrPrius) unless I hold the brake and feather the gas pedal.

Putting it in park I don't see the Hybrid Battery Charge while the ICE is running.

I had a long drive on Route 52 when I noticed it went from 6 or 7 bars to 1 bar (that is when I started paying attention to the Energy Monitor and the quick discharges.

Currently I only see charging when I am coasting and the ICE is running or if I am stopped and using the brake and the gas pedal together.