2010 prius "check hybrid system" message received today. :(

The original lasted 12 years! I bought it from Toyota.
Then you KNOW it will fit correctly withough modification.
You will want to charge it for several hours at 4 amps or less.
When I put mine in, it wasn't enought to start the car. But I had brought my
charger with me. It started at 3.5 amps for 3 hours, then started going down.
I had to go somewhere so I wasn't able to fully charge it. I took the charger off and put it away,
and closed up the back. It was about 15-20 minutes, but the car started.

When I got back home I put it on the charger for 10 hours. Haven't had a problem since.
I have a usb port that shows voltage. With the old battery it would start at 14.1 volts, then drop
to 13.8 and pretty much stayed there. But with the new battery it will start at 14.0-14.1 volts, then
drop down to 13.5 and eventually go to 13.1 volts.

 

The Toyota battery is the gold standard but you might pay twice the price in some markets. There have been reports of poor availability but I think you need to call and ask for price and availability. The battery has smaller terminals than some that are about the same size and it has a vent port for a special tube in the car. With that said, auto supplies have aftermarkets that fit with vents. I use one and saved money.

There is no need to buy a bluetooth adapter that has to be unlocked.

 

Think so. With iPhone app purchase at least, the purchase is registered, and if you migrate to a new phone all previous apps are still registered.

 

You could easily have a temperature related issue which you want to know about quickly if it exists. Your 12v battery is on life support at 12 years old, do yourself a favor and proactively replace it before it strands you away from home. A bluetooth adapter for a free scanner app is $30. Buy it and figure out how to use it before you need it is also being proactive. Link in my post above. The battery is waiting at your local dealer or auto supply.

 

This "could" be 12v battery related. You should have a meter can check the battery.
But, it needs replacing. A week 12v battery causes all sorts of issues.
Toyota MAY have a charged one on hand. But they don't normally charge them, they just
sit on the shelve. You could ask them to charge it, but will the do it correctly and not go above
4 amps? Who knows?
But your trickle charger will work for over night. Check the voltage before charging it and after.

 

Auto part store offer battery check and should include load testing..
Replacement is needed if failed or close to failure...

Posted via the PriusChat mobile app.

 

Check hybrid system often means your airflow in the HV battery is restricted. Dirty vent or filter, cleaning the vent fix most of this message. I will not change anything without a proper diagnosis. It is like shooting in the dark and draining your wallet.
1. Clean the vent on the HV battery
2. get any capable OBD2 scanner like Veepeak or Panloong with Dr. Prius Apps (free version). Check if all HV battery is within range and the internal resistances are homogenous. Don't buy a Pro version of Dr. Prius that is mostly a gimmick. There is no way to check battery life expetancy or battery capacity. NiMH batteries often drop or fail abruptly, not slow degradation like Li-ion.
3. No need to worry about a 12V battery if you always can start the car without issue. Some last more than 10 years.

If it is not broken, don't fix it or waste time and money for nothing.

 

Bad advice on a 12 year old 12v battery.

 

The 12V battery does nothing besides starting the car. There is no correlation with the check hybrid system. There is indeed some error warning when the battery is dropped below 10V when starting the car but no issue if it can go to Ready mode.

 

It can draw excessive current trying to charge and will certainly strand the op soon.

 

We can simply buy a jump starter with a Li-battery pack from reputable brands. Prius only need 60Amp for starting the car. we rarely have unintended drain battery issues in modern cars these days. In Prius 3rd gen, the body lights turned off after about 30 minutes but accidentally turning on parking lights may drain the battery quickly. I always have a jump starter (only cable or battery pack) in all of my cars because things happen.

 

The 12 volt battery doesn't start the car. It supplies power to the computer.
Then tells the main computer if everything is operating correctly or not. If it is, the hybrid
system is turned on and the car is "ready". If not, it won't start and you'll get warning.

Again, if the 12v battery is weak, you could possibly get warning lights.

 

Keep an eye on your MPG after replacing that battery. I'm curious if it drops like others have 7-12mpg.

 

mine didn't, most don't

 

The 12V battery effects nothing but placebo effects. DCtoDC converter manage the 12V battery and all 12V lines once the car in READY state. The MPG depends mainly on HV battery, MG2, MG1, inverter, and engine performance. As long as those components are good, MPG will stay the same.