2019 Low voltage issues etorque - POE55 & P1A20 codes

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mobilehunting

Junior Member
Joined
Jun 1, 2026
Posts
1
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1
Location
Wisconsin
Ram Year
2019
Engine
5.7
In 2024 103k my original etorque started making some bearing noise I was able to locate a new one so I installed it and had the truck reflashed. I kept the original e torque as a emergency backup

2025 replaced the 12v battery

Fast forward to early this spring 2026 130k while driving around couple times the low voltage alarm came up 12.2 - 11.7 v if I shut the truck off and restarted it the voltage would jump back up to 14.7 - 14.3 v (normal voltage)
After a couple times of the random low voltage alarms . It stopped charging all together. With codes POE55 and P1A20

P0E55 - DC/DC Converter Current Sensor Circuit 'A'

P1A20 - Battery Energy Control Module Hybrid
Battery System Precharge Time Too Long

I had the 12v battery tested and it was good

I assumed my second e torque failed so I replaced the bearings in my original “working” e torque and installed it on the truck. Had the truck re flashed. Cleared the codes. Drove the truck around and the voltage Slowly constantly drops 11.2 v rechecked the codes and the P1A20 code is back

I ordered a 3rd e torque covered under 2 year warranty
The e torques are 3-5 months back ordered currently

I find it hard to believe that the e torque is actually the problem at this point I’m leaning towards something with the 48v battery

What do you guys think? Has anyone experienced this issue? Any tips for testing the 48v system?
 
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