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Evaporative Emission Control System Gross Leak Detected

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Have a shop with a smoke machine,smoke test it, and repair the EVAP Leak

Posted on Nov 07, 2010

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Po455 po446


The P0455 means Evaporative Emission Control System Leak Detected (gross leak) and the P0446 means Evaporative Emission Control System Vent Control Circuit.
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Sep 24, 2012 | 2002 Chrysler Town & Country

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Diagnostic codes PO442, PO305 and PO455 comes up on the computer. What do these codes mean?


P0305....Cylinder 5 Misfire Detected


P0442....Evaporative Emission Control System Leak Detected (small leak)


P0455....Evaporative Emission Control System Leak Detected (gross leak)

Feb 11, 2011 | 2001 Dodge Caravan

2 Answers

What does po440 on a 2003 saturn vue mean with a service engine soon light on


That is a problem in the evaporative emission control system.
Could be anything causing it
Clogged filter in the charcoal canister
A leak in one of the vacuum lines
The purge valve not working,,,etc.
The best thing is to take it and have it checked out, they might have to do a smoke test to find the problem.
All they do is inject smoke into the system, if there is a leak the smoke will come out of it. All it takes is a pin hole in these emission systems to screw it all up.

Aug 13, 2010 | 2003 Saturn VUE

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I checked the codes and one comes up its po446. i dont under stand what it mean so i cant fix it to get the light to go out.


P0446 Evaporative Emission System Vent Control Circuit.
The following are descriptions of all Evaporative possible codes:

P0441 Evaporative Emission System Incorrect Purge Flow
P0442 Evaporative Emission System Leak Detected (small leak)
P0443 Evaporative Emission System Purge Control Valve Circuit
P0444 Evaporative Emission System Purge Control Valve Circuit Open
P0445 Evaporative Emission System Purge Control Valve Circuit Shorted
P0446 Evaporative Emission System Vent Control Circuit
P0447 Evaporative Emission System Vent Control Circuit Open
P0448 Evaporative Emission System Vent Control Circuit Shorted
P0449 Evaporative Emission System Vent Valve/Solenoid Circuit
P0450 Evaporative Emission System Pressure Sensor/Switch
P0451 Evaporative Emission System Pressure Sensor/Switch Range/Performance
P0452 Evaporative Emission System Pressure Sensor/Switch Low
P0453 Evaporative Emission System Pressure Sensor/Switch High
P0454 Evaporative Emission System Pressure Sensor/Switch Intermittent
P0455 Evaporative Emission System Leak Detected (large leak)
P0456 Evaporative Emission System Leak Detected (very small leak)
P0457 Evaporative Emission System Leak Detected (fuel cap loose/off)
P0458 Evaporative Emission System Purge Control Valve Circuit Low
P0459 Evaporative Emission System Purge Control Valve Circuit High
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At least the cap isn't loose for the gas tank.

I would clear the code with an OBD-II Scanner 'erase code' button, and see how long it takes for it to come back.

Aug 06, 2010 | 1996 GMC Jimmy

2 Answers

What is he code 455 for a 2006 hyundai sonata means


CODE PO455 EVAPORATIVE EMISSION SYSTEM LARGE LEAK DETECTED.POSSIBLE CAUSES CANISTER VENT SOLENOID MAY BE STUCK IN OPEN POSITION / EVAP CANISTER TUBE EVAP CANISTER PURGE OUTLET TUBE OR EVAP RETURN TUBE DISCONNECTED OR CRACKED OR CANISTER IS DAMAGED / EVAP CANISTER PURGE VALVE STUCK CLOSED OR CANISTER DAMAGED / FUEL FILLER CAP MISSING LOOSE NOT TIGHT OR THE WRONG PART / FUEL VAPOR HOSES TUBES BLOCKED OR RESTRICED OR FUEL VAPOR CONTROL VALVE TUBE OR FUEL VAPOR VENT VALVE ASSEMBLY BLOCKED /FUEL TANK PRESSURE SENSOR HAS FAILED MECHANICAL FAULT /FUEL TANK CONTROL VALVE IS CONTAMINATED DAMAGED OR HAS FAILED.

Oct 21, 2009 | 2006 Hyundai Sonata

2 Answers

Po455 code on ford


go to the link and scroll down for a really good explanation of this system and what goes wrong with it, P0455 is a leak in the Evaporative emission control system, gas fumes.
http://www.explorerforum.com/forums/showthread.php?t=145063

Sep 15, 2009 | 1999 Ford Taurus

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

2004 buick regal evaporative emission control system leak gross l


First thing to check is the gas cap, make certain it is tight and the cap seal is not damaged or cut. In many cases this is the root cause for the P0455.
If that checks good, you want to check the vacuum hoses from the EVAP purge solenoid under the hood, all the way back to the EVAP canister. Make certain all are connected and not damaged or cracked.
Let me know.
Regards,

Apr 03, 2009 | 2004 Buick Regal

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