Code B1413 tear dash apart?

Well..... You kinda need the evaporator temperature sensor to actually work. Sure you can hack a resistor in the circuit and possibly make the system turn on. Then the compressor wouldn't be able regulate the temperature and the evaporator would ice up, which results in no airflow or cooling.

Yes it stinks that the engineers designed this so that you have to take it all apart, but that's how it is. The system needs to know the temperature as part of a feedback loop to control the compressor.

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Well, it does show an evaporator temperature of −21.46 ℉, which I'll go out on a limb and guess isn't right. Or else, please tell us what kind of refrigerant you're running.

I'm pretty sure the thermistors used are negative-temperature-coefficient, so a very low reading like that would indicate a very high resistance or open circuit.

Such a problem can always be something other than the thermistor itself, like the wiring to it or a connector in that wiring. That's why there's still diagnostic work for a human to do after reading a trouble code.

The connector at the A/C amplifier is probably accessible without a whole lot of work. A person could use the diagram to identify the pins there that correspond to the sensor, and measure its resistance from there, see what you get. I'm not looking in a Gen 2 repair manual at the moment, but it wouldn't surprise me if the troubleshooting instructions for that code might start with a step like that.

 

Though a bit dated, here is the workup for DTC B1413 : https://share.qclt.com/%E4%B8%B0%E7%94%B0%E6%99%AE%E7%91%9E%E6%96%AF%E5%8E%9F%E5%8E%82%E8%8B%B1%E6%96%87%E6%89%8B%E5%86%8Cpdf%E6%A0%BC%E5%BC%8F/Repair%20Manual/04pruisr/05/2044g/cib14131.pdf

 

It sounds like an option likely to lead to evaporator icing and intermittent cooling, or early wear-out of the compressor, or both.