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The code po442 keeps coming up on my car, I have a 2003

Customer Question
Hi JA: Hello. How can we...
Hi
JA: Hello. How can we help?
Customer: The code po442 keeps coming up on my car
JA: Just to clarify, what's the exact code? And have you tried to reset it?
Customer: I have a 2003 buick century
JA: Are you fixing your Century yourself? What have you tried so far?
Customer: Yea I am. I didn't reset it. I have a little computer
JA: Anything else you want the mechanic to know before I connect you?
Customer: My check engine light is on
Submitted: 5 months ago.Category: Buick
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Answered in 1 minute by:
6/16/2017
Buick Mechanic: Ron Z., - Buick Tech - replied 5 months ago
Ron Z.
Ron Z., - Buick Tech -
Category: Buick
Satisfied Customers: 19,135
Experience: 18+yrs experience. State Inspector and Buick Diagnostics
Verified

Hi! Welcome to JustAnswer. Thanks for coming! I'm Ron and I'll be working with you on your question today.

What have you tried so far to correct the problem?

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Customer reply replied 5 months ago
Nothing yet I have a little computer and the code po442 is coming up it's a 3.1 engine and I think it's a evap leak but I need to know what the part is I have to change so my check engine light will go off 2003 buick century
Buick Mechanic: Ron Z., - Buick Tech - replied 5 months ago

Ok. Great. Thanks. Please give me one moment to type out some info for you. Sit tight one minute... I'll be right back...

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Customer reply replied 5 months ago
Ok
Buick Mechanic: Ron Z., - Buick Tech - replied 5 months ago

Thanks for holding!

The P0442 is "EVAP System Small Leak Detected". Unfortunately, this is a very "general" code. First thing to check here is the fuel cap. Make sure the cap is tight and sealing the system correctly. Check the underside of the fuel cap for any cracks or signs of defects that may keep the cap from sealing correctly. If there are any doubts about the inspection of the cap, replace it. Keep in mind, you will need a cap that meets OE Specs. Those "universal" or "locking" fuel caps sold at after market parts stores do not meet OE specs, and will not seal the system correctly.

If you are certain the cap is good, then the next best course of action is to have the EVAP system "smoked". This is where a machine forces smoke through the system and any leaks can then be more easily found.

If you do not have access to a smoke machine, then carefully inspect the vacuum lines near the fuel tank and under the hood as best you can looking for any cracks, holes or disconnections.

If you are certain there are no leaks, then the problem will lie in the EVAP Purge Solenoid. This is located under the hood, mounted to the top, rear of the engine. Inspect the electrical connector and wire harness for any loose, broken or damaged wires. Inspect the vacuum lines for any cracks, holes or disconnections. If ok, replace the Purge Solenoid.

Please be kind enough to leave a rating for our Q&A using the 'stars' at the top of the page or click 'Accept'. A 5-star rating is very much appreciated! Rating or accepting my answer does not cost you extra.

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Buick Mechanic: Ron Z., - Buick Tech - replied 5 months ago

..

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Buick Mechanic: Ron Z., - Buick Tech - replied 5 months ago

Were there any other questions I could help you with today? Any other info I can provide that may better assist?

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Buick Mechanic: Ron Z., - Buick Tech - replied 5 months ago

..

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Buick Mechanic: Ron Z., - Buick Tech - replied 5 months ago

Were there any other questions I could help you with today? Any other info I can provide that may better assist?

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Buick Mechanic: Ron Z., - Buick Tech - replied 5 months ago

..

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Buick Mechanic: Ron Z., - Buick Tech - replied 5 months ago

HI! I noticed this Q&A was still open, So I wanted to check in and see if there was anything else I could do for you on this issue? Were there any other questions you had? Any other info you needed?

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Ron Z.
Ron Z.
Ron Z., - Buick Tech -
Category: Buick
Satisfied Customers: 19,135
19,135 Satisfied Customers
Experience: 18+yrs experience. State Inspector and Buick Diagnostics

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