Featured Prius 2011 spitting out reservoir coolant

Engine coolant is coming out where? From under the cap of the reservoir?

With check engine light there will be codes. Get them read and post? Even a basic obd port code reader should get some. Probably not all the info, but at least a start.

 

Dont unplug battery so codes can remain in memory.

Leave overnight and should be able to drive until next overheat, it is your waterpump.

When replacing the waterpump if you dont burp the system there will be more failed waterpumps.

 

Burping means getting all the air out.

 

After a drive or putting the car in maintanence mode and letting it get to normal temp, then shut it off and open the coolant reseviour and you will hear the pressure escape.

Do that after each drive and eventually you will get all the air out.

Sorry you have spent so much money on OEM parts, I put in a cheap $125 aftermarket waterpump and all is good.

 

Air in the lines can lead to the pump overheating and burning out the seals.

 

No, the battery is air cooled.

Can you post a picture of the problem when coolant is spitting out?

Bob Wilson

 

May be blown head gasket. What does the oil look like does it look contaminated?

If you have had some previous bad engine over heats does not take much of that to damage the aluminum head. Before putting any more money in the car get a compression test done on the engine.

 

What does that connector lead go to? your seeing a symptom there not the fix there’s a reason it’s burned out whatever it’s powering is bad and pulling a lot of power.

After fixing that it get a IR thermometer and monitor that plug heat and wire heat if you have no idea what it goes to.

 

The idea is it's the water pump connector.

Burned contacts in connectors don't always have to be caused by some other part. They can begin with a bit of oxidation of the contact. That increases its resistance, driving the heat up. The heat accelerates the oxidation, and the process runs away.

I think there's been at least one other thread recently involving that same connector, which might already have the part number for the correct repair terminal. Otherwise, you can locate that connector in the Electrical Wiring Diagram as demonstrated here and expand to get the repair terminal and splice sleeve part numbers as shown here. Being a non-interior repair, it will involve a sealant-infused shrink sleeve over the splice.

 

Great now charge the battery!!

 

You will need a donor plug so start looking for a prius in a junkyard or for parts and cut the plug off and put it on your car.