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Old 01-26-2010, 03:23 PM   #1
Taz
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Gas cap p0450

Hi I changed my gas cap and got a cel p0450 never had this before anyone know about this

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Old 01-26-2010, 03:48 PM   #2
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Hi I changed my gas cap and got a cel p0450 never had this before anyone know about this

DTC definitions: PO450: Evaporative Emission Control System Pressure Sensor Malfunction .

Bad gas cap?
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Old 01-26-2010, 04:09 PM   #3
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Never had it before.I just picked up a locking non venting cap put it on and got code.
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Old 01-26-2010, 05:26 PM   #4
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When the old cap is on I can't hear the air come out when undoing.with new cap I hear the air come out but get the code p0450. Does this have to do with the other codes that I get. P1128 p1130
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Old 01-26-2010, 05:41 PM   #5
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Sorry, I don't have those codes available. Try here ---> Manuals
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Old 01-26-2010, 07:19 PM   #6
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Quote:
Originally Posted by Taz
Hi I changed my gas cap and got a cel p0450 never had this before anyone know about this

Yes, common issue with aftermarket locking gas caps, the cars don't like them. We've tried Stant and other brands, but about 8 out of ten throw the code right away, the rest do it after a few starts. Put a nice new Porsche gas cap on and the problem (after you clear the code) will not return.

We eventually gave up on locking gas caps; the car's EVAP system is too sensitive…………….
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Old 01-26-2010, 07:24 PM   #7
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if you cant clear the code it will go away after a few tanks. once the evap system does a few cycles.
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Old 01-27-2010, 05:15 AM   #8
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Thanks I ordered one from Porsche.I have the comp to clear the codes
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Old 06-21-2012, 10:01 PM   #9
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Originally Posted by JFP in PA View Post
Yes, common issue with aftermarket locking gas cap, the cars don't like them. We've tried Stant and other brands, but about 8 out of ten throw the code right away, the rest do it after a few starts. Put a nice new Porsche gas cap on and the problem (after you clear the code) will not return.

We eventually gave up on locking gas caps; the car's EVAP system is too sensitive…………….

Bump. ^ True. Learned that the hard way. While the topic is about locking gas cap, what do you think of last year's sales of gas cap. Here's a blog I saw on the net but it was 4 years ago:
Sale of locking gas caps triples in 2008

Last edited by kotto; 06-24-2012 at 04:12 AM.
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Old 06-22-2012, 04:32 AM   #10
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Since our fuel filler doors lock, why buy a locking gas cap?
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Old 06-25-2012, 06:27 PM   #11
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Since our fuel filler doors lock, why buy a locking gas cap?
Aye! So why does one buy a locking one? One can never be too safe?

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