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I live in Illinois where by law cars newer than 1996 get emission tested only by OBD (on-board diagnostic, or something like it). So, I failed the test, showing the following codes:
P0450 - EVAP Control System Pressure Sensor
P1446 - Manufacturer Specific Code
Last year the law did not require "computer only" test, and I passed the test without a problem. I read the warning codes back then, and they were the same, so I new the emission was OK, it was something else.
Here things get really weird - at the same time my "check engine" lite initially went off - this was after a minor repair at the local dealership - my gas tank started acting up. I could not, and I still can't fill gas normally, it has to be done vary slowly, otherwise the neck overfills and shuts the pump.
The dealer came up with some ridiculous and outrageous explanations having to do with the catalytic converter, the gass pump and other things, well over one grand to fix, so I dismissed them right away.
I think it's got to be something related to the EVAP unit, or the sensor that measures pressure in the tank. It is fooled into thinking that the gass cap is off, so it shuts some valve, or something. Also noticed that after I drive for awhile, it builds up pressure in the tank, and when I shut the engine down, it makes some droning sound for a few minutes, unless I unscrew the cap, then it stops.
I would have replaced the EVAP unit, but I'm not sure that will take care of the computer reading.
Has anyone had such a problem? Or knows how to go about fixing it?
Thanks
P0450 - EVAP Control System Pressure Sensor
P1446 - Manufacturer Specific Code
Last year the law did not require "computer only" test, and I passed the test without a problem. I read the warning codes back then, and they were the same, so I new the emission was OK, it was something else.
Here things get really weird - at the same time my "check engine" lite initially went off - this was after a minor repair at the local dealership - my gas tank started acting up. I could not, and I still can't fill gas normally, it has to be done vary slowly, otherwise the neck overfills and shuts the pump.
The dealer came up with some ridiculous and outrageous explanations having to do with the catalytic converter, the gass pump and other things, well over one grand to fix, so I dismissed them right away.
I think it's got to be something related to the EVAP unit, or the sensor that measures pressure in the tank. It is fooled into thinking that the gass cap is off, so it shuts some valve, or something. Also noticed that after I drive for awhile, it builds up pressure in the tank, and when I shut the engine down, it makes some droning sound for a few minutes, unless I unscrew the cap, then it stops.
I would have replaced the EVAP unit, but I'm not sure that will take care of the computer reading.
Has anyone had such a problem? Or knows how to go about fixing it?
Thanks