p3000, p0a80, fails to start

too much oil?

 

owner ran out of gas and kept driving?

 

Not going to guess on this one, but am interested to see what the cause was, also what resolutions were taken place.

If I had to guess, I would say oil being overfilled, but that has already been said.

 

Also waiting with baited breath

 

I have a question for Mr electric (or anyone): I have a 2008 prius , 170,000 miles- error codes POA8O, P3OOO, VO8, and V12 according to Toyota. They did the hybrid water pump recall. I brought it to them because triangle light and check engine light on. I took out hybrid battery- checked all 28 cell voltages and it looked good-(1 at 7.78, 8 at 7.79, 6 at 7.8, 10 at 7.81, 3 at 7.82v). There is no corrosion on terminals ,just a gray film on the negative terminal area behind nuts. I live off road. The hybrid fan was packed full of dirt-blew it clean along with the whole trunk area. Could that be my only problem?
Can I just replace the hybrid battery, clear codes and save myself a lot of money? Thanks

 

So your saying there was so much oil it shot through the pcv valve and out the tiny hole in the throttle body and went the other way towards the air cleaner and got the maf wet with oil? Wow.
Hope you cleaned the throttle body too 'cause that's alot of oil. I would imagine the plugs wouldn't enjoy that either.
And the air cleaner has to be soaked too.

 

Given that the battery fan was so clogged how distended or swollen do the battery packs look. They would overheat and swell up with no cooling fan. Check them carefully.

 

No expert here, but if the battery pack is still out of the car, I would suggest you take the time to balance the pack. Also check the resistance of the modules and cells. It is pretty clear that the voltage's you show is helping to contribute to the battery being out of balance which will throw the P0A80 and the P3000.

I base the above on many post's here on PC that discuss the issue.

There is a lot of info here on PC concerning the balancing of the traction battery. It is part of the rebuild process whenever the codes appear that those who have successfully rebuilt their batteries have done and documented.

Traction battery rebuild question | PriusChat
Gen II Prius Individual Battery Module Replacement | PriusChat

 

I agree with Ron. Perhaps a bit of module balancing is all that is required, given that the spread of cell voltages is really not all that large. Of more interest is the spread in module internal resistances. You might also consider shuffling the modules so that those which were in the center are now moved to the outside, and vice versa, as the inner modules take the most heat damage by way of electrolyte loss.

 

Thanks, good idea. Cells look good with no swelling and all wires seem to be in the right spot. After reading ryousideways chat from April, he states that all cells need to be within 05 hundredths of a volt after balancing. Mine are within 04 now. He recommends temporarily wiring them in parallel to do a final equalize for 6-24 hrs. and then back to series before install. I can do this with my limited electrical knowledge. Is this a viable way to go? It seems after reading various chatters posts about tear down, re-balance with charge/discharge cycles and rebuild, many can of worms could be opened. I see the need though if the cells were abnormally high or low indicating problems.
Also Toyota said 2 of 8 cells indicated failure. Were they just blowing smoke since there are 28 cells? Also what does the codes VO8 and V12 indicate? They said said my regular battery should also be replaced. It was replaced 2 months ago, but I replaced it again anyway (free). After all this I still think it was just my clogged fan.

 

The Prius modules (6 cell packs) are not lithium, and respond well to re balancing done with care. The origin of Doorman's new acquisition.

John (Britprius)

 

Bro, it appears to me your pack is fine. One thing you will notice on this site is that a lot of people take a severely conservative approach with things and they like to warn people unnecessarily and scare people. Yer pack reads good on all modules. There is a ton of stuff you can do to it to, check, balance, etc but really you're balanced. Put the battery back in and enjoy the ride.

Phil

 

I recently discovered the "maintenance" mode that will enable us to start the engine and keep it running. Would this be useful for doing an equalize charge? That's something that 48 volt telephone battery plants periodically received, whereby the battery was charged to 54 volts or so to balance the individual (2.25 volt in this case) cells that make up the battery assembly. These were very large cells weighing 50 to 100 pounds per cell and were traditional lead-acid wet cells, not nickel metal hydride like Prius.

 

No, its not useful for that. For one thing, the modules are wired in series. This severely limits any equilization charging or discharging can do. Toyota doesn't mind because they limit the charge to 80% which allows them to account for or ignore differences in internal resistance (or balance) that may arise over time. Even in maintenance mode with the engine running all the time, the software will not allow for a charge greater than 80%.