On Sep-16 my hybrid started making grinding noises and went to half power.
The temperature was high and the OBDII reader gave me P0335 [Crankshaft Position (CKP) sensor circuit, no signal]
I bought a new TDC Sense and replaced it today as well as topping off my fluids.
The coolant had gotten low.

After a few miles of test driving,
The check engine light came on and the car had the same symptoms.
This time the OBDII reader came up with
P1449 [Battery Module Overheating,Battery Cell Overheating, Battery Module Individual Voltage Input Deviation, Battery Module Deterioration, Battery Module Deviation]
P1600 [TCM Internal Watchdog Operation]

I doubt the battery would cause the noise.
I'm leaning more towards to Transmission Control Module.
What is the TCM and where is it located?

 

Alright,
I've isolated it to the the radiator fan.
It seems that causes the overheating which causes all the other stuff.

I tested all relays and fuses.
They all work.
I tested the fan motor.
It works.
I tested the voltage to the fan.
it reads 0.

 

I got the fans working,
And double checked all my fluids,
But it still overheats.
It didn't throw any OBDII codes this time,
But I suspect that's because I got home before it did.
Any ideas?

 

Make sure to bleed the cooling system of air pockets. Sometimes there's a bleeder close to the thermostat (check the manual for your car).

Also, a thermostat that's stuck closed would cause overheating without throwing trouble codes.