2nd Gen Neon 2000 - 2005 2nd Gen Neon

P0455 (Large Evap leak)

Old May 8, 2023 | 02:40 PM
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rwfnetworking
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From: Phoenix, AZ
Default P0455 (Large Evap leak)

Trying to track down a P0455 Large Evap leak. Hooked up my smoke machine and found a couple leaks but the P0455 still is coming back. I have the throttle body plugged, but I'm seeing a good amount of smoke from the butterfly pivot pin and also from the oil cap. Are these issues or normal areas that will leak during this type of test? I haven't tested the gas cap yet, but I hear that is a common cause of this error code.


Robert
 
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Old May 12, 2023 | 03:08 PM
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paw paw
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^+1 on putting the gas cap, seal & neck sealing area, including the tank fill hose & its end connections on the suspect list. More thoughts for consideration, let us know what else you find.
 
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