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Registered User
Join Date: Mar 2018
Posts: 3
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P0456 Check Engine Light -08 C4 Cabriolet
Hello all,
I recently purchased my first 911: a 2008 C4 Cabriolet. About two weeks after purchase, my check engine light came on and the error code os P0456. From what I've read so far this seems pretty benign with likely cu'prit being my fuel cap or a vent valve. Does anyone have any experience with this fault? I'm going to try replacing the gas cap first; is that a good start? Regards, Jim |
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03-03-2018, 02:05 PM
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Registered
Join Date: Jan 2004
Location: Pittsford, NY
Posts: 3,721
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Check the O ring on the cap for cracks. Car is now 10 years old. Could be any part of the evap system. If O ring is good you might be better off having a better diagnosis then continuing to swap parts until you find the right one.
__________________
Tony G 10 Porsches come & gone! 1962 Morgan Plus 4 
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03-05-2018, 07:57 AM
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Registered User
Join Date: Mar 2018
Posts: 3
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Thank you Tony. I just replaced the gas cap and the light remained on. I may try disconnecting the battery terminals in case it's a latched fault. If that doesn't work I'll probably take it to a shop and have them isolate it.
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03-08-2018, 01:11 PM
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Registered
Join Date: Aug 2010
Location: Earth.............
Posts: 2,908
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Quote:
__________________
Accrochez-vous bien de vos rêves..........." |
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03-08-2018, 02:40 PM
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