Question about 2003 Oldsmobile Aurora

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Check engine light comes on

Code 442 shown when check engine lights comes on call for checking the fuel system. I have replaced the gas cap and the problem has not gone away.
Are there any sensors that I can check or what would cause this problem to continue?

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Check the Your Vent Solenoid back and also check your purge canister for leaks. You may need to take it in to a auto shop to have them "smoke" check your lines and canister. I know this probably wont give you a fix, but it will definately eliminate some of the easier things. Thanks for using FixYa!

Sincerely,

JC

Posted on Nov 21, 2008

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1 Answer

Check engine light code reads 442. What should I check


DTC P0442 - Evaporative Emission Control System Leak Detected (small leak)
This indicates a fuel vapor leak in the EVAP control system. It means a very small leak has been detected. In fact, the leak can be from a hole as small as 0.04" in diameter.

The (EVAP) emission control system prevents the escape of fuel vapors from a vehicle's fuel system. Fuel vapors are routed by hoses to a charcoal canister for storage. Later, when the engine is running a purge control valve opens allowing intake vacuum to siphon the fuel vapors into the engine. You likely won't notice any drivability problems.

A code P0442 most likely means one or more of the following has happened:
- A loose or improperly affixed gas cap
- A non-conforming gas cap (i.e. not factory/original brand)
- A small leak/hole in a fuel vapor hose/tube
- Other small leak in EVAP system
- Faulty vent o-ring seal


With a P0442, the most common repair is to:
- Remove and reinstall the gas cap, clear the codes, and drive for a day and see if the codes come back.
- Otherwise, replace the gas cap, or
- Inspect the EVAP system for cuts/holes in tubes/hoses

Hope this helps; remember to rating this answer and leave a testimonial comment. Thabk you for using Fixya.

Oct 14, 2011 | 2006 Buick LaCrosse

2 Answers

The engine trouble light comes on I check it on my dianostic tool & I get a code 442. But I have no idea what that means, Can you help-?


Hello: 442 concern the evap system. It means you have a small leak. The most common item would be a gas cap that is not fully tight or the seal on the cap is dry and not sealing good. Try tightening the cap first, then get the code cleared and see if it comes back.

Aug 21, 2011 | 2002 Pontiac Grand Prix

1 Answer

I have a 2002 grand vitara suzuki the light of check engine soon is comming on I know the code is p.o. 442 . should I bring to the mechanic again? Thank you


First make sure your gas cap it tight. 3 clicks. On a 9 year old car I would replace the gas cap if the light does not go out after your tighten the cap, clear the codes, and drive it for a couple of days. It can also be a leak at one of the fuel vapor hoses or a leak in the EVAP system.

Mar 18, 2011 | 2002 Suzuki Grand Vitara

1 Answer

P1456


code P1456 set when there's small leak in the fuel tank system.
Most known reason for P1456:
-Didn't tight fuel cap on until it click for more that 3 time after fueling up and drove the car too long with cap loose.
-or a bad gas cap.
I'll try tighting the gas cap.
clear check engine.
if code come back, replace gas cap and clear check engine light again.

Dec 15, 2010 | 2001 Honda Odyssey

2 Answers

Location of sensor for troubleshooting po442 to cause check engine light to come on


P0442 OBD-II Trouble Code - Evaporative Emission Control System Leak Detected (small leak)

What does that mean?
This indicates a fuel vapor leak in the EVAP control system. It means a very small leak has been detected. In fact, the leak can be from a hole as small as 0.04" in diameter. The (EVAP) emission control system prevents the escape of fuel vapors from a vehicle's fuel system. Fuel vapors are routed by hoses to a charcoal canister for storage. Later, when the engine is running a purge control valve opens allowing intake vacuum to siphon the fuel vapors into the engine.


Symptoms
You likely won't notice any drivability problems.


Causes
A code P0442 most likely means one or more of the following has happened:
* A loose or improperly affixed gas cap
* A non-conforming gas cap (i.e. not factory/original brand)
* A small leak/hole in a fuel vapor hose/tube
* Other small leak in EVAP system
* Faulty vent o-ring seal


Possible Solutions
With a P0442, the most common repair is to:
* Remove and reinstall the gas cap, clear the codes, and drive for a day and see if the codes come back.
* Otherwise, replace the gas cap, or
* Inspect the EVAP system for cuts/holes in tubes/hoses


46b629a.jpg

Fig. EVAP vent solenoid (2) on 3.1L, 3.4L, 3.5L & 3.8L, showing the connector (1) and vapor line (2)


510065b.jpg

Fig. EVAP canister purge solenoid location on 3.1L & 3.4L


a193655.jpg

Fig. EVAP purge solenoid valve (3) location on 3.5L




Hope this help, good luck.

May 11, 2010 | 2002 Buick Century

1 Answer

2002 dodge dakota with a check engine light code 442


P0442:

Small leak detected in evaporative purge system

if i had to guess I would say that your gas cap is not on tight enough or that is is bad. chrysler has had a lot of bad gas caps that cause EVAP service engine lights.

Feb 12, 2010 | 2000 Dodge Dakota Quad Cab

1 Answer

Check engine light code 442 reolaced gas cap still coming back on after clearing


Then either it's the wrong fuel cap, or you have a leak else where. I'd look under the back at the fuel tank where the fill hose goes to the tank. The tanks like to break there. Most of the time people smell the gas before the light is set, but it may be differant in your case.

Oct 13, 2009 | 2003 GMC Envoy Xl

2 Answers

GM Code 442


Do you mean code P0442? I would assume that's what you mean since you said it relates to the Evap System

This code indicates that there is a fuel vapor leak in the system. This means that a very small leak has been detected. The leak can be from a hole as small as 1mm


This code point towards any of the following:
a loose gas cap or a non factory spec gas cap
a small leak or hole in the fuel vapor hose/tube
faulty vent o-ring seal

The most common fixes is to re install the gas cap, clear the codes, and see if the code returns. Or replace the gas cap and clear the codes and see if it returns. Finally inspect the hoses/tubes for cuts/holes

This code in no way points to a canister requiring to be replaced.

Sep 29, 2009 | 2005 Pontiac Sunfire

1 Answer

What do I need to check if code 442 comes up.


442 cose states that there is a small leak at the evap control system (near fuel tank)... smell gas?

Sep 28, 2009 | 2006 Pontiac G6

2 Answers

I Own 98 dodge Dakota check Engine light, code PO 442 Evap Emission Control System Leak (small). Gas fill pipe is rusted, Should flapper hold back air with gas cap removed?


No the flap inside the fuel filler pipe is just an anti theft device to make it more difficult to siphon fuel out of the tank. The most likely cause for the code it the fuel cap itself. If you don't get the gas cap tight after you fuel up, it can set a computer code and turn on the Check Engine Light. After you check to make sure the cap is on tight, clear the engine code and see if it comes back on. If it does then have the fuel cap tested to make sure that it doesn't have a vaccuum leak.

Aug 27, 2009 | 1998 Dodge Dakota

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