Is Prius V Fuel Tank Vent Hose Replaceable Without Replacing Entire Fuel Tank?

I would think that you would be able to find a hose somewhere online and have an independent mechanic replace it for you. My (uneducated) guess is that they are referring to the little hose directly connected to the gas tank which seems to end up going to the top of the filler neck. Even if you have to replace the gas tank you could probably get a good one from a junk yard for a fraction of the cost.

 

The only way to know is to drop the tank yourself. I'd recommend getting a 2 day subscription of the techstream documentation
https://techinfo.toyota.com/
and read up on your model V's diagnostic trouble codes (dtc) and repair info.
That way if you drop the tank you'll know pretty much what you're looking at and should be able to see if the dealer was straight up with there diagnosis and repair estimate.

Even if you want to take it in for a second opinion, you'll have a lot more info and a better idea of what a mechanic is talking about.

You've already done a decent job of isolating the components in the general area. Techstream will help you narrow down your options and let you read how the repair is done.

 

It might be a simple and inexpensive repair. The Toyota dealer is obligated to return the car to near original specification, and the are very willing to take the opportunity to do so as it adds to their profits.

I either buy or borrow a remote viewing viewing video scope to look into the area of the to see the damage to the hose.

It's likely that only the rubber and soft parts like some of the wiring is chewed. As long as the plastic fittings are intact, the repair might be made with a few fittings. some pieces of fuel-evap hose and some clamps. Wiring repair shouldn't be that hard, either.

Other that that, the full scope of the damage might not reveal itself without taking down the tank.

 

My 2013 Prius v (142k miles) is throwing the same two codes. I can clear the codes, tighten the cap, and they come back after the next "cold soak" (car has been sitting for 12 hours). The test must be run right after the car is started after a cold soak, since the light comes on about two minutes later.

Any ideas what to check in TS to isolate the EVAP leak? This is my Lyft driver car, so I can't simply ignore the CEL. I already have a TPMS light stuck on due to a dead TPMS sensor.

 

First, I would buy and install a new genuine Toyota gas cap, clear the codes and see if that solves the problem.

If not, I would buy and use a smoke generator like this one to find the leak, if there is one. It is cheaper than taking it to a dealer.

Smoke Machine Automotive Leak Detector,Evap Vacuum Smoke Diagnostic Tester,Pipeline Fuel Leakage Detector Compatible with 12V Vehicles

 

An even cheaper test would be to swap the gas cap between my 2013 Prius v (throwing the codes) and my 2017 Prius v (not throwing codes). If the 2017 starts throwing codes after the swap, the problem is the gas cap. The 2013 is in the body shop at the moment, or I would try it tonight.

Somebody hit my 2013 on the left front corner on September 16th. The CEL came on a few days later. Is there part of the EVAP system located behind the bumper on that corner? I would love it if this could be fixed by the other driver's insurance.

 

No, the evap system is located in the left rear near the gas tank and its filler.

The evap valve is located in the front center of the engine compartment next to the PCV valve and to the left of the intake manifold from the driver's position.