P1121 & B1421 w/ photos attached. 1-2 weeks after Inverter Pump Rplcmnt

Here's the reservoir in the attached image. My engine keeps running at idle while parked. Is the radiator safe to uncap or does that mess with the air?


Update: ~11:30am EST

Guys the CEL turned back *on* suddenly while the car was idling for about 1-to-2 minutes. I'll have to see if a new error code displayed. I wonder if that mechanic did not affix the inverter pump on properly? But this is the engine coolant loop, completely separate circuit (unless i am still mistaken). Rather peculiar.

 

And if you're wondering the following quick explanation (~45 seconds) is why I would be a a bit apprehensive when removing the radiator cap but If i need to do it I need to do it.

 

I found this underneath the car when I moved it. Passenger side. The ground was a little damp. Think it *might* be pink hue but it's unclear to me. Maybe you guys have better eyes than I do.

 

New updates. I don't see any coolant under the radiator cap except for some loosely leftover on the inside of the cap itself.

However, the current coolant level *has* been discovered within the reservoir! Looks like a tiny bit left?

Also, did not notice any pink crusting on top of the engine water pump.

Finally, a new code has been discovered. P0505 Idle Control System.

 

Do I have to drain the entire system or can I refill the reservoir? Do I need to enter maintenance mode? My MFD has the a/c connection issue but it should work (hopefully).

 

Bumping. Need extra advice before I get supplies and DIY or hire my mechanic again. What I don't understand is in these videos is, why use a manual method to run the inverter pump while pouring new coolant into the radiator? What about maintenance mode?

Would it be dangerous to simply top off my overflow reservoir with the coolant it needs? Sounds like it just needs a little coolant.

 

Would you speculate P0505 is stemmed off from the engine idling due to low coolant?

How do I check the radiator? Would the overflow reservoir automatically fill once I top off the radiator with more coolant? The overflow reservoir is very low as displayed in those recent photos.

 

Okay I understand. How do I check it? Just simply remove the radiator cap? How full does it have to be? What if it has issues going down by using a funnel? I have plenty of cardboard lying around so I'll get on that as soon as I realize the new coolant has been topped off.

 

I don't have that voltmeter thing to manually force the inverter pump to jump start. Can I just turn the car on READY mode for the same effect?

 

Alright yeah I got confused because in the video he is activating a "pump" with a voltmeter of some sorts (thought this was the inverter pump) and it looks to be helping assist the newly-poured radiator coolant down into the radiator itself (After squeezing both radiator hoses).

However, upon further research and what you appear to be describing, turning the car on into IG-ON mode with the heater on full blast appears to have the same effect, as long as the radiator cap is OFF. As always, be sure to correct me on this one as it could be important?

Are both circuits attached to the heat storage tank? Or only one and which one?

 

Guys I just put a funnel into the radiator cap and it displaced coolant. The funnel displaced coolant up to the base of the funnel.

Turns out the pic from before didn't tell the whole story. Posting new images now.

 

ICE will not stop idling both before and after refilling the reservoir. Is that the new P0505? Do I need to clean the throttle body?

Thinking I now need to replace the Coolant Control Valve (that shipped today). As well as clean the throttle body.

Image 1: New coolant filled in the reservoir

Image 2: Coolant is actually in the radiator, looks like.

Image 3: Placed cardboard in case of a leak.