Error code P0456 -

Go Back > Dodge Vans & CUVs > Dodge Caravan
Log In 

Dodge Caravan The Dodge Caravan is the best selling mini van from Dodge. How many Dodge Caravan owners here at would agree? Discuss it now!

Error code P0456

Thread Tools Search this Thread
Old 08-28-2009, 04:37 PM
BigBlueGa BigBlueGa is offline
Join Date: May 2007
Vehicle: '06 MegaCab 1500
Location: Monroe, Ga
Posts: 36
Default Error code P0456

'03 Caravan 83k miles. The engine light came on and this is the code P0456 that was on it. Where would be good place to start looking for the problem?
Reply With Quote
Old 08-28-2009, 05:21 PM
kev2 kev2 is offline
Join Date: Apr 2009
Posts: 339

Evaporative Emission Control System Leak Detected (very small leak)


this is an evap system code- often called -loose gas cap- As starting with gas cap is first sure its tight, and the seal is good..
I would ck that ....fill tank operate hopefully cap was issue and repeated drive cycles will clear code....

If dosn't clear:
no other codes.... then let us know the -the EELD - evap emiss leak detector (smoke machne) is next step BUT is vehicle operated on steep grades? there is a TSB FOR a problem with PCM

Last edited by kev2; 08-28-2009 at 05:30 PM.
Reply With Quote
Old 08-31-2009, 09:31 AM
BigBlueGa BigBlueGa is offline
Join Date: May 2007
Vehicle: '06 MegaCab 1500
Location: Monroe, Ga
Posts: 36

Thanks for the info, away from the computer all weekend. Will try the gas cap and see what happens. The van is not driven anywhere that has alot of steep grades.
Reply With Quote
Old 08-31-2009, 10:02 AM
jarhead03's Avatar
jarhead03 jarhead03 is offline
Join Date: Jun 2009
Posts: 368

Check your rubber hoses underneath by your gas tank, mine had dryrotted and threw that same code
Reply With Quote
Old 08-31-2009, 11:09 AM
RickMN RickMN is offline
Join Date: Jul 2007
Posts: 290

Most common causes of trouble code P0456


How to test a leak detection pump


How the whole EVAP system works on a Chrysler vehicle

I'm a retired ASE Master/L-1 Technician. I still keep current with the latest automotive technology.
Reply With Quote
Old 01-23-2012, 11:41 PM
mark1963 mark1963 is offline
Registered User
Join Date: Oct 2010
Posts: 16

it was a LOCKING GAS CAP ON MY RAM 1500, if you installed a locking gas cap, even if bought from the dealer as where i bought mine, try the factory cap first,
Reply With Quote
Old 01-23-2012, 11:49 PM
otgarzā otgarzā is offline
Join Date: Aug 2011
Vehicle: 2002 Durango Sport 4.7 2WD
Location: Romeoville, Illinois
Posts: 514

456, 441, 442, 440...had all of these and i switched out the gas cap to realize it wasnt the prob. then changed the evap hoses under the truck...fixed two codes. the other two went away after i replaced the evap hoses in the engine. Ive been code free for about two months and hoping to keep it that way...ive got emissions this year.
Reply With Quote
Old 05-25-2012, 07:03 PM
dodgeman7 dodgeman7 is offline
Registered User
Join Date: Nov 2007
Posts: 4

I know this is an old post but I fixed my small evap leak. My engine light came on last week and came up the code P0456 on my '03 Grand Caravan. Checked the obvious locations connectors, hoses near air filter. Found that my pcv valve was loose and tightened it and cleared the codes again. After a very short drive down the street the check engine light came on again. Traced all evap hoses to the vapor canister under the van and pulled off one 3/8 hose off the canister only to find out that the hose split near the connector. Bought a regular 3/8 fuel hose and cut it to length and put new clamps on and slightly tightened them up. I then cleared the codes again and drove the car about 2 miles and no problems with the check engine light. Hooked up OBDII to recheck for any codes and found nothing. Seems to be all okay now. Very simple to fix even a monkey can do it.

Here is what the vapor canister on a GC looks like. It's located on the driver's side under the car. It's big and you can't miss it!!!
Reply With Quote
Old 08-21-2014, 10:51 PM
Tony Back Tony Back is offline
Registered User
Join Date: Aug 2014
Posts: 8

Error Code: P0456 Fault:
Evaporative Emission (EVAP) System - Small Leak Detected
Possible Cause:
Malfunction Indicator Lamp (MIL)(K83) active.
Fuel Cap not fully attached.
Evaporative Emission (EVAP) System leaking/faulty.
Evaporative emission (EVAP) pressure sensor.
Possible Solutions:
Check Fuel Cap.
Check Evaporative Emission (EVAP) System.
Reply With Quote

Similar Threads
Thread Thread Starter Forum Replies Last Post
engine light P2433 just1creation Dodge Stratus 1 08-04-2015 10:05 AM
03 R/T p0201, p0202, p0203, p0204 Sembach5 Dodge Neon 0 08-02-2015 10:55 PM
2000 Durango 4.7l error code p1391 MoparNut87 1st Gen Durango 9 07-30-2015 04:30 PM
All 4 injector malfunctions 03 neon rt Sembach5 Dodge Neon 0 07-28-2015 09:14 PM
'96 P300, P301, P302 Codes Crytot 1st Gen Dakota 5 07-13-2015 05:26 PM

00, caravan, code, control, detection, dodge, emission, error, evap, intrepid, location, neon, p0456, po456, ram

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump


All times are GMT -4. The time now is 08:17 AM.