Question about 2000 Dodge Dakota Quad Cab

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Code 442 cleared it now code 455 whats up

Code 442 book said small leak in evap.cleared code two days later code 455 book says large leak in evap. system

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There is a leak within the evap solenoid and lines.find the leak with a smoke tester.

Posted on Oct 04, 2009

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I have a Mini Cooper with check engine light on and 3 codes came up: P0172, P0455, and P0442, can some help me find out what this is and how to fix it, thank you in advance.


Code 172 means the O2 sensor is telling the computer the fuel mixture is too rich.
Code 455 is a large evap leak in the gas tank venting system, and code 442 is for a small leak. The engine computer pressurizes the fuel tank every few minutes to check for leaks. Vapor leaks (fumes) could escape into the air if the system is not working correctly.
Its possible the system is faulty and allowing gasoline to be pulled into the engine instead of it being vented thru the vapor canister.
You would need to find out where the vent leak is first.

Jun 15, 2015 | Mini Cooper Cars & Trucks

1 Answer

2004 jeep grand cherokee code 442/455


OBD code P0442 Small EVAP leak detected you may need to check the EVAP canister under the vehicle and the purge valve as well check for cracks on the canister or the purge valve and check all the rubber hoses connected to them foe cracks or holes. If you find any damage parts replace them. P0455 which means a large EVAP leak is sometimes referred as the gas cap leak check your gas cap and secure it tight if you still have the code change the gas cap hope this helps after you find and fix the problems get the vehicle to a shop and they will use an OBD scan tool to clear the codes.

Feb 26, 2014 | Cars & Trucks

1 Answer

Code p0442 and p0455. When I start the truck it takes about 5 seconds to actually start. If I turn it off and start it again, it starts right up.


Well code 442 is a small EVAP leak and 455 is a large leak. Those codes could be a faulty gas cap or any leak in the gas tank venting system including the gasket around the fuel pump. The engine computer pressurizes the gas tank when the engine is running to check for leaks.
The starting issue could be a faulty check valve in the fuel pump allowing fuel pressure to drain back into the gas tank.

Jan 30, 2014 | Dodge Cars & Trucks

1 Answer

I HAVE 2 (DTC CODES OF P0442 AND P0455 ON MY 2002 DODGE CARAVAN SE 3.3L -HOW CAN I FIX


442 evap emissions control system leak detected [small] 455 same but a gross or large leak detected first is to check gas cap is on correctly and is properly sealing these are known codes for that problem -if the cap is good than u will need to follow the gas/vent lines under the vehicle looking for leak check for damaged or disconnected lines usually can get a smell of gas in area of damage

Oct 24, 2011 | 2002 Dodge Caravan

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

Engine light on cleared and came back on


Evap Codes.You got the codes. Leaks. Now check the entire system. May be a cracked or loose hose. If not,check valves,switches.solenoids. If nothing you can find or are familiar with on site,you will need professional help and possibly a pressure test,vacuum test, smoke test etc,to find the problem.

Mar 31, 2010 | 2002 Chrysler Town & Country

2 Answers

OBD codes 442 & 455


Check all of your EVAP lines and the charcoal canister. Also check the lines and overflow line from the gas cap to the gas tank.

Jun 12, 2009 | 2002 Dodge Grand Caravan

1 Answer

What do codes p 442 and p 455 mean????


442 evap small leak 455 evap large leak

Apr 17, 2009 | 2001 Dodge Caravan

1 Answer

Error codes 442 and 456 on 2003 Chrysler Town and Country


Could be the gas cap.  Do you fill the tank with the engine running?
Otherwise, check the hoses near the Evap canister.  I have 2003 T&C and had the small leak and large leak codes.  I looked at the evap cansiter and the hose coming from the fuel tank vapor line had a huge crack in it, to the point it had fallen off the evap caniser.  I trimmed the end of the hose and reconnected and voila, no codes.
The evap canister is on the driver's side of the van, underneath, slightly behind the drivers seat.
BTW, to clear the codes without an OBDII reader, remove the negative cable for 5-10 minutes (15 to be safe).  The computer resets and clears the codes, except for one that it sets saying loss of power to the memory.

Jul 22, 2008 | 2003 Chrysler Town & Country

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