Anyone successfully cleared permanent P0A80 DTC?

Permanent codes are usually clear themselves out after some time when the codition is no longer present. This happened when I forgot to hook up the hybrid battery after replacement.

The coded cleared after a couple of days.

 

It depends on the code, because every code has its own confirmation driving pattern. If you don't go drive that pattern on purpose, then how long it takes depends on the way you normally drive and how long until you've randomly happened to hit all the same conditions as in the confirmation pattern.

This is an unusual thread, though, as the OP really has looked up P0A80's confirmation pattern and gone through it on purpose, and hasn't seen the code go away. That's weird, and I'm kind of stumped myself.

 

I drove around with a permanent P0102 for close to a year because, as it turned out, the confirmation pattern was missing a step in the old Repair Manual edition I was looking in. The member Elektroingenieur looked up the same procedure in the up-to-date manual online on TIS, and sure enough, there was a step that had been left out before.

It was during the pandemic, and my greatly-curtailed driving had never quite hit all the conditions of that pattern for most of a year.

 

I am having the same problem until today, I have driven 1000miles but the permanent code is still there

 

Did this today with Dr. Prius and it took only about 15 minutes and only a few miles. Here's what I did:

1. Used a scantool to clear all DTCs on the ECU and battery module, even though none were present.
2. Overkill, but I disconnected the 12V battery for 5 minutes to make sure all stored codes were cleared.
3. Reconnected 12V battery
4. At this point, the permanent P0A80 code was still present, that's OK.
5. Turn ignition on but do not start car, make sure dash does NOT say "Ready"
6. Use Dr. Prius to enter maintenance mode and then start the car
7. Confirm MAINTENANCE MODE on the display, engine will stay running.
8. Let car idle for 30 seconds
9. Go on a drive on a long country road or freeway, making sure speed stays above 25MPH for at least 5 minutes, total trip time needs to be at least 10 minutes.
10. After a 10 minute long trip where the car was > 25MPH for at least 5 minutes, park somewhere and leave it in maintenance mode with the engine running.
11. Shift the car to neutral with the AC on. This will start discharging the HV battery since the car cannot charge when the drivetrain is in neutral
12. Use Dr. Prius to monitor the state of charge (SOC) while chilling in neutral. Discharge until SOC is below 30%. I stopped at 26%. Do not fall below 20% or else it will set a new code, but you must dishcarge to below 30%.
13. Turn the car off.
14. Start the car in normal mode, permanent code is now gone.

I listed out every step to be as specific and detailed as possible but honestly this was very easy and took no time at all. The code cleared on the first try, I was actually surprised. The code did not clear until the very end, after dropping below 30% SOC and also turning off the car. I checked with Dr. Prius and with my Harbor Freight scantool, both which showed the permanent P0A80 before and both showed no codes afterwards.

There is no need to drive hundreds or thousands of miles, just use a scantool and follow the procedure exactly. I used a stopwatch during the drive and paused it any time speed was below 25MPH to be absolutely certain of the times.