EHarris

The check engine code is for a Large Evap Leak and Small Evap Leak. The evap is part of the emissions system which performs a self check every certain amount of miles.

CharlesS

The problem with the Small Evap Leak (gas cap leak) occurred a few years ago on my '11... Instead of replacing the gas cap I decided to clean the sealing surface of the filler neck with throttle body cleaner and wipe the gas cap O ring with water and apply a slight coating of grease. The code has cleared.....

EHarris

Is this broken?!? If it is it could be the cause of my check engine codes and GASCAP

Is on top of my gas tank.

EHarris

Upon closer inspection this appears to be alright.

I check all of the connections running to and from the gas tank, evap canister and filler hose. Everything appears to be ok. I cleared the codes and immediately all of them came back within 3 min of driving the vehicle.

I feel like this would be something major disconnected or obvious.

EHarris

OK this is a great link I found in another post. I know throwing money at it isn't the answer but I can get parts at cost.


So looking at this diagram....Is there anything anyone recommends trying that would be all 3 codes immediately after clearning?


Vapor Canister and Leak Detection Pump

EHarris

Maybe this?

EHarris

Morning bump so I can hopefully order some parts.

OverKill

I don't know, I am just telling what happened to me. I don't understand what the computer does it check all that. If a gas cap fixes it and I don't have to pay for a smoke test, I will buy a gas cap.

Spytec128

Have you checked the vapor canister to make sure it is not cracked? The gas tank system is a closed system so a cracked canister can cause your symptoms.

EHarris

Yea I wish it was just the gas cap. I went with that logic first too.