another cooler problem

Have you tried running the heating system? Did you have the heater running when bleeding air out of the system? Check that you are getting heat and check for gurgling noises, which would confirm that there is air in that part of the system. Also, are you sure you didn't switch the intake and output hoses when you changed the 3 way valve? Did you check the proper operation of the thermostat, belt-driven water pump and Coolant Heat Storage water pump?

I believe the P1150 code relates to another issue. Maybe you need to clean the throttle body and Mass Air Flow sensor.

 

Here are the work ups for those two codes

P1121 - Coolant Flow Control Valve Position Sensor Circuit Stuck

P1150 - Coolant Path Clog Up For Coolant Heat Storage System

Probably a reasonable conclusion. The "clogging" is most likely an airlock. Did you run the CHRS pump to ensure you filled it with fresh coolant? Anyway there is good info in the work ups.

Hope those help.

[EDIT]

Here is a diagram of how the cooling circuit is plumbed:

 

Totally Independent. You will get a whole different set of codes if the inverter cooling system is malfunctioning.

 

In case you had not figured this out yet, that valve is misnamed and is really an engine coolant control valve.

Continue checking fluid level in the radiator and overflow reservoir. Turn on cabin heat to max, fan speed high, continuously rev the engine to circulate fluid. Run the CHRS pump a few times manually to move fluid into the canister.

Yes, it appears you still have air in the engine coolant loop. See my posts 22 and 42 here:
Changing engine coolant | Page 2 | PriusChat

 

That you still have air in the engine coolant loop. After the engine has cooled down, check coolant level in the radiator as well as the overflow container and fill both. Check this repeatedly until both remain full.

 

That maybe true, but that does not mean you don't still have air in the system.

You may need to repeat the cycle where you run the ICE in inspection mode with the heater on max heat and the fan on full for one or two more 15-20 min cycles.

If you haven't already read elsewhere, leave the black front engine cover off until a week after you are satisfied that all air is out. That way it makes it far easier checking and filling the radiator filler neck.

 

I am having the P1150 code and would like to know which is the pump that is supposed to run with the relay jump, nothing happens when I try that jump with my multimeter. Maybe I need to eeplace a pump. Is it the collant heat storage pump or the auxiliary water pump? Thanks.

 

2gen prius 2008

 

The engine coolant heat recovery system pump is the pump which is manually activated. The reason to run the pump is to refill the coolant heat recovery canister and get air out of that portion of the engine coolant loop.

The point of using the multimeter is to measure current drawn by the pump. Obviously you have to set the meter to read DC current, not DC volts. If that is too difficult, forget about using a meter and just use a paper clip to jump the appropriate relay socket terminals to activate the pump.

 

Thanks, I do have the meter set to read DC amps... will check again tomorrow, could the pump be bad?
I never used the meter for amps but it looks very easy... I did change the cable on the meter to the 10A. Max. Socket. And dial 200 Amps, the other choices are mAmps. Anyways will try the paperclip too. I was tempted to do that. I live in hot Florida and it is cooler this week, maybe that is why the p1150 now... although I had an engine light for long time and fixed a couple of week ago when I replaced the ecu and the inverter pump p1121 - I am also new to the obdii which I am using with my phone with Torque pro. And yesterday I changed the temp senaor by the "thermos" That did not go well... I used I sensor from Discount AP. It looks almost the same but the senaor itself is a bit different. The thread looks the same. But now it is leaking on that spot even with the old sensor... hope I don't have to replace the whole thermos and sensor assembly...

 

Hey wait a sec ... misnamed where? Toyota just seems to call it valve assembly, water, with bracket. Does it show up with 'inverter' in the name anywhere in Toyota's Repair Manual, or in the Techstream fortune cookie for the code? Or is this more a caveat emptor thing when using third-party manuals or scan tools?

Are some of those posts on PriusChat? Maybe a little follow-up wouldn't hurt them any.

 

After a few weeks out for work I came back to play with the prius cooling system, I didn't find a good valve for the thermos in ebay, they look too ruated. So I ended up fixing mine. I don't have the p1150 any more but now I have the p1118 although no "check engine" light... I did change the temp sensor in the bottom of the thermos... Can't seem to be able to get rid of the p1118 code now...