I have been recently having a problem with a P1441 code being thrown and my CEL coming on.
I inspected my gas cap, and I pushed and released the push button vent on it several times before trying to blow air past it.
It seemed to be air tight.
I have replaced all the rubber vacuum lines to and from the new Genuine ACDelco OEM switch and new OEM vacuum control, then checked again for any other potential leaks in the system.
The other day I purchased a new Duralast Non-Vented gas cap.
Thinking I would avoid any future issues with the push button vapor release not holding pressure.
My CEL came on again today after about 50 miles, the code, the same P1441 (vapor flow during non-purge event)...
When I opened the cap, I did hear the rush of vapor coming from my filler tube this morning, after the CEL had come back on..
Is the cap on a 96 Impala SS supposed to be vented or non-vented ?
Am I experiencing a situation where as the fuel is being consumed, a vacuum is being created in my tank and the EVAP system seeing the low or loss of pressure as a vapor flow during non purge event, hence the DTC ?
Or do I need to drop my fuel tank and check the lines going into it?
I can’t think of any other component areas where there could be a possible pressure leak releasing the fuel vapors into the air.
Any suggestions ?
Any and all help is greatly appreciated!
Thank You for your time !!!
I inspected my gas cap, and I pushed and released the push button vent on it several times before trying to blow air past it.
It seemed to be air tight.
I have replaced all the rubber vacuum lines to and from the new Genuine ACDelco OEM switch and new OEM vacuum control, then checked again for any other potential leaks in the system.
The other day I purchased a new Duralast Non-Vented gas cap.
Thinking I would avoid any future issues with the push button vapor release not holding pressure.
My CEL came on again today after about 50 miles, the code, the same P1441 (vapor flow during non-purge event)...
When I opened the cap, I did hear the rush of vapor coming from my filler tube this morning, after the CEL had come back on..
Is the cap on a 96 Impala SS supposed to be vented or non-vented ?
Am I experiencing a situation where as the fuel is being consumed, a vacuum is being created in my tank and the EVAP system seeing the low or loss of pressure as a vapor flow during non purge event, hence the DTC ?
Or do I need to drop my fuel tank and check the lines going into it?
I can’t think of any other component areas where there could be a possible pressure leak releasing the fuel vapors into the air.
Any suggestions ?
Any and all help is greatly appreciated!
Thank You for your time !!!