Can you use R134 instead of R134a refrigerant in a Gen 2 Prius?

I'm not sure where you heard that but I know our resident professional auto A/C Technician @lech auto air conditionin uses dye In Prii A/C systems as required.

 

Switching to any of the hydrocarbon based refrigerants requires a bit of a work around, but 134a in a system that originally ran 134a with or without the dye added has no known problems.
The value of moving to a hydrocarbon based refrigerant is reduced energy to power the pump and a much better heat transfer because the hydrocarbon mixes are far more efficient as a refrigerant gas. The only reason we ended up with R134a in the first place was the refrigerant manufactures needed a product they could sell to replace R12 and they weren't going to make big $$ mixing hydrocarbon gasses that anyone could do and destroy their market dominance ......

T1 Terry

 

UV dye by tracerline products or by the company called UViEW AC EXTENDYE,

 

Are you saying these are the products that are bad for Prius or are you saying these are the product you recomend for Prius?

 

these are the ones I recommend

if you go onto the Company website for these products you will see they make different dyes for different purposes.
And you will see they make a specific part number just for hybrids. Or a hybrid dye that can also be used in regular cars. Because you guys are hybrids half she kept moisture free in better packaging in a different base oil