Small Evap Leak


Asked by Oct 21, 2013 at 06:02 PM about the 2001 Nissan Sentra GXE

Question type: Maintenance & Repair

I have a 2001 Nissan Sentra. The check engine light came on for small evap leak. I
bought a new gas cap and still is on. I am unsure on what to do now. There is a whole in
the muffler or exhaust not sure if that is what is triggering engine light. The part the gas
cap screws into is a little rusty. What should I do? Haven't reset engine light either

1 Answer


Your symptoms suggest an evap canister problem. The original vent is badly designed. You have 2 choices. You can buy a new one(reviewed design) at your Nissan dealership (which will cost around 100-200$). Or you can try to clean/lubricate it like described here: I replaced mine 2 years ago on my Sentra 2006. At that time, the car was 5 yo. I would not go into such expanses for a 12 yo car. Either way, do the job yourself, it's easy and you will save the labor cost. The original vent looks like this: The new one has a much more sturdy design:$%28KGrHqN,!ocFHlLL5OdqBS!%28Rc%295fw~~60_35.JPG?set_id=880000500F

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