TSB EG011-03 I think?

I think I have been suffering this for about 30K miles now.

MY ECU was replaced once due to failure at about 26-28K miles. My gas tank was replaced once at something above 40K (not covered).

When starting the Prius (the problem never happens when it is driving) either cold or hot (some short time after it had been previously driven) it will give me all the fun lights, I think some call it the "Christmas tree".

4 restarts will reset everything, except occasionally the Check Engine light.

This behavior started at around 90K miles so I am boned if it is (was never even offered an extended warranty). Dealer says I gotta pay $1.5K for new computer. Frankly it's Toyota shoddy hardware that has not broken due to wear but was designed wrong. Looks like a bad BIOS in a computer (bad computer analogy) to me.

The first two times it happened was within 24 hours of a dealership oil change. The 4th or 5th time was in front of a tech who reset the codes and said it was the magic 3 fuel system repair that they can not say will fix it.

Since 90K miles it always happens after an oil change. I watch them and all they do is put it on a lift, and do an oil change/ rotate tires and basic fluid checks. I don't understand why it triggers after this event every time.

I notice that just before it lights everything up the engine runs rough for just a moment (feels like missing or just a different idle speed). When the problem happens the engine does not fail to start or cut off when the lights come on.

After the second time (the first by the time they got it the lights were reset and they said there were no codes stored) I replaced the relay since it was the cheapest of the three and they said the replacement gas tank I got was one that is in the range of the repair for this so I should not need to replace it again (at the time that's what they said).

Tech now says the diag codes say the fuel system is bad but that I should replace all 3 (for $2.4K) items, but that they do not assure me the issue will be fixed.

Am I doomed to have this happen until I ditch the Prius or will replacing the ECU really fix it? I don't feel like spending several thousand dollars in repairs if they cant say yes this will fix the problem.

From reading tech info I could have a bad sensor in the gas tank (less likely I think) but there are at least half a dozen of them involved in monitoring fuel and integrity. It could also be that the engine for whatever reason is idling outside the insanely narrow range the computer likes, I am told this will generate the error as well.