| From | Message |
Rick
Dodge Dakota
9/20/2001
20:50:26
|
 Subject: Engine code
IP: Logged
Message:
Anyone know what engine code PO455
means? My mil light just came on tonight and I
can't find any reference to this code#. Any help
will be greatly appreciated.
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kicker01
Dodge Dakota
9/20/2001
22:07:04
|  RE: Engine code
IP: Logged
Message:
P0455 Large (gross) leak detected in the evaporative purge system. I dunno what that means but if you dak is still under warranty I would take it to the dealership to have it looked at.
'01 RC 4.7 5spd
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rick
Dodge Dakota
9/20/2001
23:21:43
|  RE: Engine code
IP: Logged
Message:
Thanks kicker. Anyone know what this
means? ? Is it ok to drive the truck until I can
bring it into the dealer? I put on a Mopar cold
air intake kit a couple of months ago. Could
this have anything to do with it? Should I try
and reset the computer and see if the light
comes back on? Truck is a 2000 Sport 3.9.
Thanks
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Bruce P.
Dodge Dakota
9/21/2001
21:28:52
| RE: Engine code
IP: Logged
Message:
Here is the scoop.
Under specific condions, 2 'diagnostic' tests are run to verify that gas fumes are not escaping from the fuel tank.
1) close off all hoses py picking some relays then attempt to pump a slight pressure in the 'air' above the gas in the fuel tank. verify pressure can hold. (failure throws code PO455)
-- if this passes--
2) open a specific-sized orfice and time the bleed-down time thru this small hole.
I hesitate to get any more technical than the above generalization. (Some folks may have heard the pump in phase1 after starting their Dak... it is a soft thumping or ticking sound under the hood for about a minuite.)
BOTTOM LINE: The most common reason for the PO455 error code is caused by not having the gas cap on tight.
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rick
Dodge Dakota
9/23/2001
11:19:13
| RE: Engine code
IP: Logged
Message:
Thanks Bruce, I appreciate your help. The gas
cap was the first thing I checked. I reset the
comp. and the light has stayed off. My dealer
told me the light probably didn't mean
anything. Must be a common occurrence.
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xplikt
Dodge Dakota
JOIN HERE
4/09/2002
01:38:28
| RE: Engine code
IP: Logged
Message:
Hrm, I've gotten one of these now. Could it be, because I changed to a locking gas cap?? Anyone else get this error that can tell me a little more about it. I have no idea what the "evaporative system" is?
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LARRY TINDER
Dodge Dakota
JOIN HERE
3/20/2006
12:39:36
| RE: Engine code
IP: Logged
Message:
IN REFERENCE TO THE CODE P0455-I FOUND A HOSE LOOSE FROM MY EVAP DISCHARGE LINK-THE HOSE W/ THE GREEN CAP-I FOUND IT BY THE SOUND. HOPES THIS HELPS
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TooLate
Dodge Dakota
JOIN HERE
3/20/2006
13:17:51
| RE: Engine code
IP: Logged
Message:
Well Larry, considering you answered a post that was 4 years old, I'm hoping that he had it fixed long before your answer. You guys need to look at the date of the post before you answer.
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Vomithaus
Dodge Dakota
JOIN HERE
11/09/2008
16:34:25
| RE: Engine code
IP: Logged
Message:
I just had the same thing. Remember that even if the guy posted 4 years ago... there are other guys looking for the answer!
Thanks!
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