Check/Service Engine Soon - Evap System Problem

[GioTop]

Hello, everybody,

I'm new here, although not all that new to Nissan/Infinity

I have a question and hope somebody can help me figure out way forward:

I recently bought 1999 Infinity I30 for my teenage son. It had 130K on it and ran fine until some yougsters rear-ended it - mostly body damage. I got it fixed and the car runs fine (sort of) but now it has Check/Service Engine Soon light on.
Had Autozone read the codes and they gave me: P0325, P0450, P1446
- so the Evap System which makes sense since it is in the back where the car was hit...

My question is what happens if I just ignore the CEL and continue driving as is:
- first of all: is it safe? Then will it be reliable?
- what will be affected - gas mileage, power, environment, annual inspection, etc?
- How much may it cost to fix it - if it is more than couple hundred $, there's no point in fixing it since the car itself is worth about $3K, maybe $3.5K.
- Can I maybe find a used part that may be needed and use it to save $s: canister, valve, etc - whatever that may be?

Any insight and suggestions will be very much appreciated.

Thank you.

[NutriaforBreakfast]

When you put gas in it do you hear "rushing" air?
If so, try to determine if the air is sucking into the tank or blowing out.
If so, check you gas cap or try a new one
The car should be vented properly to not have this issue

[GioTop]

Thanks for your response.
Here's an update: I filled up the tank to see what gas mileage I would get with CEL on and discovered that the gas is leaking when the tank is full - had a mechanic look at it and apparently it's the filler neck, but it only leaks when I fill up... so the next step is to replace it and see if things get back to normal.

Will keep you posted.

Thanks very much!

GioTop