5

My 2015 Prius had been sitting for several months without being started. The starter battery went flat so when I turned it on, the dash turned on and off in a loop.

I charged the starter battery to full, and tried again. “Hybrid system error, see dealer”. The hybrid system indeed doesn’t run, only the ICE engine runs when I drive it.

There are many ODB-II codes, which I have exported to a file. But the only pending, confirmed, failing test is: P602F(46) ECM “eeprom error”.

I am wondering if it is okay to clear all these codes, since I imagine the low starter battery voltage (and multiple cycles) really confused the electronics.

Could clearing possibly fix the issue, or is that wishful thinking? Should I clear, or take it to the dealer as is?

Followup:

After I had recharged the starter battery, I exported the codes to a file in case I needed them later. Then I cleared all the codes and restarted the car. Great news, the hybrid system is working perfectly again, and no codes have returned. (I'll update this question again if I regret this down the line!)

aaaidan
  • 151
  • 4

1 Answers1

7

The first thing I do when checking any vehicle is to clear the codes, that way I can see what comes back up afterwards. Those are the codes you look to see what issues the car might have. So "should you"? IMHO, yes.

Most likely, clearing the codes won't fix your issues. All it's going to do is point more directly to what actually the problem might be. Especially since it's saying there's an EEPROM error. That sounds like there's an issue with computer which runs the hybrid system.

Pᴀᴜʟsᴛᴇʀ2
  • 165,084
  • 32
  • 259
  • 508