OBD II Error message

Vehicle is a 2002 WJ (Grand Cherokee Laredo) 4 liter automatic with
Select-trac

Today I noticed the check engine light was illuminated. I performed the key
on-off-on-off-on-off-on procedure and the odometer presented 2 items. The
first code was "P0456" and then that changed to "done"

Any words of wisdom out there concerning this?

Thanks,

Hi Billy Ray,
The kid stealing gas didn't take the time put the cap back on
correctly: http://www.wjjeeps.com/faultcodes.htm It must complete the
one cycle of engine running from cold to operating temperature, before
the light go out: http://www.billhughes.com/faultCode.mpg
God Bless America, ßill O|||||||O


Billy Ray wrote:
>
> Vehicle is a 2002 WJ (Grand Cherokee Laredo) 4 liter automatic with
> Select-trac
>
> Today I noticed the check engine light was illuminated. I performed the key
> on-off-on-off-on-off-on procedure and the odometer presented 2 items. The
> first code was "P0456" and then that changed to "done"
>
> Any words of wisdom out there concerning this?
>
> Thanks,

Thanks Bill,
The trip I was taking this afternoon was only a couple miles so the engine
probably did not get to operating temperature. I understand that the P0456
code is very common but what is the significance of the "done"?

-billy ray



"L.W. ("ßill") Hughes III" > wrote in message
...
> Hi Billy Ray,
> The kid stealing gas didn't take the time put the cap back on
> correctly: http://www.wjjeeps.com/faultcodes.htm It must complete the
> one cycle of engine running from cold to operating temperature, before
> the light go out: http://www.billhughes.com/faultCode.mpg
> God Bless America, ßill O|||||||O
>
>
> Billy Ray wrote:
>>
>> Vehicle is a 2002 WJ (Grand Cherokee Laredo) 4 liter automatic with
>> Select-trac
>>
>> Today I noticed the check engine light was illuminated. I performed the
>> key
>> on-off-on-off-on-off-on procedure and the odometer presented 2 items.
>> The
>> first code was "P0456" and then that changed to "done"
>>
>> Any words of wisdom out there concerning this?
>>
>> Thanks,

Hi Bill,
I beleive the done is needed like the five, five flashes of the
light before, because it sometimes take a while to run the full
diagnosis, and many times people give and saying their on and off
sequence doesn't work, unless we tell them to wait for the end of test.
God Bless America, ßill O|||||||O
http://www.billhughes.com/

Billy Ray wrote:
>
> Thanks Bill,
> The trip I was taking this afternoon was only a couple miles so the engine
> probably did not get to operating temperature. I understand that the P0456
> code is very common but what is the significance of the "done"?
>
> -billy ray

Thanks for the quick response.


"L.W. ("ßill") Hughes III" > wrote in message
...
> Hi Bill,
> I beleive the done is needed like the five, five flashes of the
> light before, because it sometimes take a while to run the full
> diagnosis, and many times people give and saying their on and off
> sequence doesn't work, unless we tell them to wait for the end of test.
> God Bless America, ßill O|||||||O
> http://www.billhughes.com/
>
> Billy Ray wrote:
>>
>> Thanks Bill,
>> The trip I was taking this afternoon was only a couple miles so the
>> engine
>> probably did not get to operating temperature. I understand that the
>> P0456
>> code is very common but what is the significance of the "done"?
>>
>> -billy ray

DONE just means the 'puter is done spitting out codes. It could say, NO MORE
CODES TO SPIT OUT, but DONE takes less space in the memory.






"Billy Ray" > wrote in message
...
> Thanks Bill,
> The trip I was taking this afternoon was only a couple miles so the engine
> probably did not get to operating temperature. I understand that the
P0456
> code is very common but what is the significance of the "done"?
>
> -billy ray
>
>
>
> "L.W. ("ßill") Hughes III" > wrote in message
> ...
> > Hi Billy Ray,
> > The kid stealing gas didn't take the time put the cap back on
> > correctly: http://www.wjjeeps.com/faultcodes.htm It must complete the
> > one cycle of engine running from cold to operating temperature, before
> > the light go out: http://www.billhughes.com/faultCode.mpg
> > God Bless America, ßill O|||||||O
> >
> >
> > Billy Ray wrote:
> >>
> >> Vehicle is a 2002 WJ (Grand Cherokee Laredo) 4 liter automatic with
> >> Select-trac
> >>
> >> Today I noticed the check engine light was illuminated. I performed
the
> >> key
> >> on-off-on-off-on-off-on procedure and the odometer presented 2 items.
> >> The
> >> first code was "P0456" and then that changed to "done"
> >>
> >> Any words of wisdom out there concerning this?
> >>
> >> Thanks,
>
>

The codes from P0440 to about P0460 have to do with the evaporative
emissions control system. Most codes that come from here have a basis in
reality that stems from the gas cap being left off, or at least not all of
the way tight or some variaton on the theme.




"Billy Ray" > wrote in message
...
> Vehicle is a 2002 WJ (Grand Cherokee Laredo) 4 liter automatic with
> Select-trac
>
> Today I noticed the check engine light was illuminated. I performed the
key
> on-off-on-off-on-off-on procedure and the odometer presented 2 items. The
> first code was "P0456" and then that changed to "done"
>
> Any words of wisdom out there concerning this?
>
> Thanks,
>
>
>

It would make it simpler for those of us that went to public school decades
ago.

We were forced to tune our vehicles "by ear" using simple hand tools (a
screwdriver and ignition wrenches) as cars did not have computers.

It also seems to me that for a decade after computers were introduced into
cars they ran like $hit because you could no longer make any adjustments
without breaking off limiter caps or drilling out the lead <gasp> plugs
blocking the adjustment screws.


"Jeff Strickland" > wrote in message
...
> DONE just means the 'puter is done spitting out codes. It could say, NO
> MORE
> CODES TO SPIT OUT, but DONE takes less space in the memory.
>
>
>
>
>
>
> "Billy Ray" > wrote in message
> ...
>> Thanks Bill,
>> The trip I was taking this afternoon was only a couple miles so the
>> engine
>> probably did not get to operating temperature. I understand that the
> P0456
>> code is very common but what is the significance of the "done"?
>>
>> -billy ray
>>
>>
>>
>> "L.W. ("ßill") Hughes III" > wrote in message
>> ...
>> > Hi Billy Ray,
>> > The kid stealing gas didn't take the time put the cap back on
>> > correctly: http://www.wjjeeps.com/faultcodes.htm It must complete the
>> > one cycle of engine running from cold to operating temperature, before
>> > the light go out: http://www.billhughes.com/faultCode.mpg
>> > God Bless America, ßill O|||||||O
>> >
>> >
>> > Billy Ray wrote:
>> >>
>> >> Vehicle is a 2002 WJ (Grand Cherokee Laredo) 4 liter automatic with
>> >> Select-trac
>> >>
>> >> Today I noticed the check engine light was illuminated. I performed
> the
>> >> key
>> >> on-off-on-off-on-off-on procedure and the odometer presented 2 items.
>> >> The
>> >> first code was "P0456" and then that changed to "done"
>> >>
>> >> Any words of wisdom out there concerning this?
>> >>
>> >> Thanks,
>>
>>
>
>

Thank you. I have been advised that this error code will reset itself if
the problem was caused by a loose gas cap. It did surprise me somewhat that
the code explainations don't offer the "check your gas cap" advise.


"Jeff Strickland" > wrote in message
...
> The codes from P0440 to about P0460 have to do with the evaporative
> emissions control system. Most codes that come from here have a basis in
> reality that stems from the gas cap being left off, or at least not all of
> the way tight or some variaton on the theme.
>
>
>
>
> "Billy Ray" > wrote in message
> ...
>> Vehicle is a 2002 WJ (Grand Cherokee Laredo) 4 liter automatic with
>> Select-trac
>>
>> Today I noticed the check engine light was illuminated. I performed the
> key
>> on-off-on-off-on-off-on procedure and the odometer presented 2 items.
>> The
>> first code was "P0456" and then that changed to "done"
>>
>> Any words of wisdom out there concerning this?
>>
>> Thanks,
>>
>>
>>
>
>

Here are all of the P0440, Evaporative Emission Control System Codes,

P0440 Evaporative Emission Control System Malfunction
P0441 Evaporative Emission Control System Incorrect Purge Flow
P0442 Evaporative Emission Control System Leak Detected (small leak)
P0443 Evaporative Emission Control System Purge Control Valve Circuit
Malfunction
P0444 Evaporative Emission Control System Purge Control Valve Circuit Open
P0445 Evaporative Emission Control System Purge Control Valve Circuit
Shorted
P0446 Evaporative Emission Control System Vent Control Circuit Malfunction
P0447 Evaporative Emission Control System Vent Control Circuit Open
P0448 Evaporative Emission Control System Vent Control Circuit Shorted
P0449 Evaporative Emission Control System Vent Valve/Solenoid Circuit
Malfunction
P0450 Evaporative Emission Control System Pressure Sensor Malfunction
P0451 Evaporative Emission Control System Pressure Sensor
Range/Performance
P0452 Evaporative Emission Control System Pressure Sensor Low Input
P0453 Evaporative Emission Control System Pressure Sensor High Input
P0454 Evaporative Emission Control System Pressure Sensor Intermittent
P0455 Evaporative Emission Control System Leak Detected (gross leak)
P0456 EVAP Leak Monitor Small Leak Detected (CHRYSLER)


As you can see, the P0456 code that you got is unique to Chrysler products,
my guess is that most vehicles will spit out a P0442 in place of the P0456
that you got. It is worth noting that a loose or missing gas cap can cause a
440, 446 and 455, and can play into a 441, 442, and 456. So, when diagnosing
these sorts of things, one has to think about all of the various ways the
same thing can expose itself, and the interrelationships of the various
components.

As for making the code go away, you can wait. Or, you can go to the auto
parts store and they will let you use the OBD II Code Reader for free to
reset the codes. I am not sure what codes can be extracted by turning the
key on and off while you hold your tongue in the corner of your mouth, but
the code readers will get everything that has ever happened since the the
beginning of time, or the last time the codes were reset - whichever is
sooner -- and are generally available to the store's customers for free. The
assumption is that you will bring the code reader back and buy your
grandkid's inheretance in repair parts.





"Billy Ray" > wrote in message
...
> Thank you. I have been advised that this error code will reset itself if
> the problem was caused by a loose gas cap. It did surprise me somewhat
that
> the code explainations don't offer the "check your gas cap" advise.
>
>
> "Jeff Strickland" > wrote in message
> ...
> > The codes from P0440 to about P0460 have to do with the evaporative
> > emissions control system. Most codes that come from here have a basis in
> > reality that stems from the gas cap being left off, or at least not all
of
> > the way tight or some variaton on the theme.
> >
> >
> >
> >
> > "Billy Ray" > wrote in message
> > ...
> >> Vehicle is a 2002 WJ (Grand Cherokee Laredo) 4 liter automatic with
> >> Select-trac
> >>
> >> Today I noticed the check engine light was illuminated. I performed
the
> > key
> >> on-off-on-off-on-off-on procedure and the odometer presented 2 items.
> >> The
> >> first code was "P0456" and then that changed to "done"
> >>
> >> Any words of wisdom out there concerning this?
> >>
> >> Thanks,
> >>
> >>
> >>
> >
> >
>
>