plinko89

Hi,

Just wondering if anyone has any clue as to the problem with Cel P0455 on an 98 Audi A4. Here is the diagnostic report from a code reader:

P0455
Evap Emission sys leak detected (gross leak / no flow)

misfire ok
fuel sys ok
comp component ok
cat mon inc
htd catalyst n/a
evap syst mon ok
sec air system n/a
a/c refrig mon n/a
oxygen sens mon inc
oxygen sens htr
egr system mon n/a

I also smell gasoline inside the cabin (definitely different from exhaust gasses). Also, when I get near empty and gas light comes on, after a car restart, gas level goes back to a little over empty and gas light turns off (a definite move in the needle, not just parking on inclines, etc.). Happened about twice before I decided to refuel.

I have checked as many vacuum hoses and had a roaming mechanic do the same and no hoses from the EVAP system were found to be leaking.

Any ideas? I dont feel like spending over a 100 bucks just to diagnose this at the dealership.

Thanks!

henryt26

gas cap? just a suggestion

plinko89

Thanks, I replaced it with an aftermarket one. Could it be that it requires an OEM part?

Fabrik8

When and why did you replace the cap?

DTFDubs

If you smell gas in the car take it to the dealership. It's better than throwing parts at it and trying to fix it and you'll spend less in the long run.