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Registered
2001 DTS : 2005 CTS
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200 Posts
Discussion Starter · #1 ·
Hi again all...

just wondering...since my last fill-up, I nowget a 'gas cap' warning all the time in my display?

can't tell you how many times I've stopped, and undone and then retwisted the cap on with MUCH force...

yet the notice is still there now for like a week..

what's it mean?

:)

Jim
 

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Registered
2003 Cadillac DTS V8 4.6L
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65 Posts
It means you have a large EVAP leak im guessin the code that will pop up will P0440. 70% of the time it just means you need a new gas cap because the seals are worn or gone. i had this same code. And all i had to do was buy a new gas cap for my car. What you should do first before you buy a new gas cap is check any hoses for looseness, disconnection, cracks & leaks on the EVAP system.
 

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Administrator
2002.5 F55 CORSA STS, 2014 Explorer XLT FWD
Joined
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72,802 Posts
Check the vacuum hose and electrical connector at the EVAP purge solenoid sticking out the rear of the throttlebody.
 

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Registered
2001 DTS : 2005 CTS
Joined
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200 Posts
Discussion Starter · #4 ·
Yes, Sub....the noted new code just popped up today...

p0440 - Evaporative Emission (EVAP) System

So I'm off to buy a new gas cap to try that first...

:-(

Jim
 
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