Hi folks,
I have my first engine code at about 65000 miles: P 0442. 2 questions if
you please:

1) What is this?

2) What do I need to do about it?

Thanks very much,
Tomes
2002 TJ 4.0, no AC

 

1) Small leak detected in evaporitive purge system.
2) Apart from the obvious, check the petrol tank fuel cap.

Dave Milne, Scotland
'91 Grand Wagoneer, '99 TJ

"Tomes" <XXtomanml@earthlink.net> wrote in message
news:Mezze.6555$aY6.724@newsread1.news.atl.earthli nk.net...
> Hi folks,
> I have my first engine code at about 65000 miles: P 0442. 2 questions if
> you please:
>
> 1) What is this?
>
> 2) What do I need to do about it?
>
> Thanks very much,
> Tomes
> 2002 TJ 4.0, no AC
>
>

 

1) Small leak detected in evaporitive purge system.
2) Apart from the obvious, check the petrol tank fuel cap.

Dave Milne, Scotland
'91 Grand Wagoneer, '99 TJ

"Tomes" <XXtomanml@earthlink.net> wrote in message
news:Mezze.6555$aY6.724@newsread1.news.atl.earthli nk.net...
> Hi folks,
> I have my first engine code at about 65000 miles: P 0442. 2 questions if
> you please:
>
> 1) What is this?
>
> 2) What do I need to do about it?
>
> Thanks very much,
> Tomes
> 2002 TJ 4.0, no AC
>
>

 

1) Small leak detected in evaporitive purge system.
2) Apart from the obvious, check the petrol tank fuel cap.

Dave Milne, Scotland
'91 Grand Wagoneer, '99 TJ

"Tomes" <XXtomanml@earthlink.net> wrote in message
news:Mezze.6555$aY6.724@newsread1.news.atl.earthli nk.net...
> Hi folks,
> I have my first engine code at about 65000 miles: P 0442. 2 questions if
> you please:
>
> 1) What is this?
>
> 2) What do I need to do about it?
>
> Thanks very much,
> Tomes
> 2002 TJ 4.0, no AC
>
>

 

1) Small leak detected in evaporitive purge system.
2) Apart from the obvious, check the petrol tank fuel cap.

Dave Milne, Scotland
'91 Grand Wagoneer, '99 TJ

"Tomes" <XXtomanml@earthlink.net> wrote in message
news:Mezze.6555$aY6.724@newsread1.news.atl.earthli nk.net...
> Hi folks,
> I have my first engine code at about 65000 miles: P 0442. 2 questions if
> you please:
>
> 1) What is this?
>
> 2) What do I need to do about it?
>
> Thanks very much,
> Tomes
> 2002 TJ 4.0, no AC
>
>

 

http://www.wjjeeps.com/faultcodes.htm
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Tomes wrote:
>
> Hi folks,
> I have my first engine code at about 65000 miles: P 0442. 2 questions if
> you please:
>
> 1) What is this?
>
> 2) What do I need to do about it?
>
> Thanks very much,
> Tomes
> 2002 TJ 4.0, no AC

 

http://www.wjjeeps.com/faultcodes.htm
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Tomes wrote:
>
> Hi folks,
> I have my first engine code at about 65000 miles: P 0442. 2 questions if
> you please:
>
> 1) What is this?
>
> 2) What do I need to do about it?
>
> Thanks very much,
> Tomes
> 2002 TJ 4.0, no AC

 

http://www.wjjeeps.com/faultcodes.htm
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Tomes wrote:
>
> Hi folks,
> I have my first engine code at about 65000 miles: P 0442. 2 questions if
> you please:
>
> 1) What is this?
>
> 2) What do I need to do about it?
>
> Thanks very much,
> Tomes
> 2002 TJ 4.0, no AC

 

http://www.wjjeeps.com/faultcodes.htm
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Tomes wrote:
>
> Hi folks,
> I have my first engine code at about 65000 miles: P 0442. 2 questions if
> you please:
>
> 1) What is this?
>
> 2) What do I need to do about it?
>
> Thanks very much,
> Tomes
> 2002 TJ 4.0, no AC

 

"Tomes" <XXtomanml@earthlink.net> wrote in message
news:Mezze.6555$aY6.724@newsread1.news.atl.earthli nk.net...
> Hi folks,
> I have my first engine code at about 65000 miles: P 0442. 2 questions if
> you please:
>
> 1) What is this?
>
It means there is a leak in the Evaporative Emissions Control System.




> 2) What do I need to do about it?
>
Put the gas cap on securely.



Check it out,
P0442 OBD Trouble Code

Technical Description
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