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Code p0455 on envoy 2004 - Cars & Trucks

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Large evap leak --check gas cap that it is on --look under truck at rear of fuel tank by spare tire and check the evap canister and hoses the following link will assist you
https://www.obd-codes.com/p0455 How to Fix Check Engine Light P0455 Emissions Purge Valve Replacement How to Fix Check Engine Light P0455 Emissions Purge Valve Replacement

Posted on Sep 19, 2016

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Posted on Jan 02, 2017

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emissionwiz

Marvin

  • 85206 Answers

SOURCE: code p0455 evap emission (large)

have the gas cap tested or just replace it, then disconnect the battery for 5 minutes to reset the code, then drive it for a few miles and see if problem comes back, if it does a trip to the dealer is in order, as this may be covered by your emission warranty which is good for 70,000 miles.

Posted on May 26, 2009

ZJLimited

ZJ Limited

  • 17970 Answers

SOURCE: P0449 and P0455 error code 2008 2wd gmc envoy

P0449 - Evaporative Emission Control System Vent Valve/Solenoid Circuit Malfunction

P0455 - Evaporative Emission Control System Leak Detected (no purge flow or large leak)

Both are refer at EVAP system; other EVAP DTCs: P0440 - P0441 - P0442 - P0443 - P0446 - P0453 - P0455 - P0456

This indicates a fuel vapor leak or lack of purge flow in the EVAP control system. It means a large leak has been detected. 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: 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)
Other leak or damaged piece in EVAP system

Possible Solutions: 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, and/or
Inspect the EVAP system for cuts/holes in tubes/hoses (you may hear a vacuum noise or smell fuel), repair if necessary


Hope helps.

Posted on Apr 23, 2011

subytech1

Brandon Johnson

  • 251 Answers

SOURCE: engine light code p0455 chev monte carlo

Hello,The problem is that the EVAP system is not able to achieve or maintain vacuum during the diagnostic testThe control module tests the evaporative emission (EVAP) system for a large leak. The control module monitors the fuel tank pressure (FTP) sensor signal to determine the EVAP system vacuum level. When the conditions for running the test are met, the control module commands the EVAP canister purge solenoid valve OPEN and the EVAP canister vent solenoid valve CLOSED . This allows engine vacuum to enter the EVAP system. At a calibrated time, or vacuum level, the control module commands the EVAP canister purge solenoid valve closed, sealing the system, and monitors the FTP sensor input in order to determine the EVAP system vacuum level. If the system is unable to achieve the calibrated vacuum level, or the vacuum level decreases too rapidly, the PCM will set the code you now have.So, you either have a stuck open purge valve, a stuck open vent valve, a false reading fuel tank pressure sensor, or a cracked/broken EVAP line.

Posted on Sep 21, 2012

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Code P0455


p0 (USA fed. codes)
455
Evaporative System Malfunction, Gross Leak #1 DTC of all time.......
gas cap missing ,or loose or wrong cap
or any leak in the tank vent system.
tighten cap , reset ECU, drive 20miles, still there.>>>??

Nov 26, 2013 | 2004 Acura MDX

1 Answer

Code 0455 on a 2004 grand prix


P0455 - Evaporative Emission Control (fuel vapor control) System Leak Detected Gross Leak

Possible causes- Missing or loose fuel cap
- Incorrect fuel filler cap used
- Fuel filler cap remains open or fails to close
- Foreign matter caught in fuel filler cap
- EVAP canister or fuel tank leaks
- EVAP system hose leaking
- Fuel tank leaking Tech notes The P0455 it's a very common code, because the code is set if the gas cap is loose or missing. Start by tighten the gas cap and clearing the code. In most cases the code can be clear by disconnecting the car battery for about 30 minutes.

Oct 02, 2012 | 2004 Pontiac Grand Prix

1 Answer

P0455


In many cases since you do not have any other codes, you may want to check your gas cap to make sure it is sealing correctly. Check it and/or replace it and clear the code. If it does come back, there are several tests to do in order to narrow down where the leak or loss of vacuum is happening. Below is a description of what the code means and what causes it to set. I hope this helps.

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12_11_2011_11_04_04_am.jpg

Dec 11, 2011 | 2004 GMC Envoy

1 Answer

Evaporation emission code p0455 misfire code p0301


PO-455 EVAP SYSTEM (GROSS LEAK)

PO --301 Cylinder #1 Misfire

Two separate problems to work on.

You will need help on those at a
repair shop

Do not let them do anything but
diagnose & repair those issues
only

Don't go down the silly tune-up road
Not necessary

Jun 09, 2011 | 2007 GMC Envoy Denali

2 Answers

P0449 and P0455 error code 2008 2wd gmc envoy 30,203 miles


P0449 - Evaporative Emission Control System Vent Valve/Solenoid Circuit Malfunction

P0455 - Evaporative Emission Control System Leak Detected (no purge flow or large leak)

Both are refer at EVAP system; other EVAP DTCs: P0440 - P0441 - P0442 - P0443 - P0446 - P0453 - P0455 - P0456

This indicates a fuel vapor leak or lack of purge flow in the EVAP control system. It means a large leak has been detected. 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: 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)
Other leak or damaged piece in EVAP system

Possible Solutions: 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, and/or
Inspect the EVAP system for cuts/holes in tubes/hoses (you may hear a vacuum noise or smell fuel), repair if necessary


Hope helps.

Apr 23, 2011 | 2008 GMC Envoy

1 Answer

PO 455 and PO 128 codes. What is wrong with my truck?


P0455 is indicating a leak in the Evaporative Emissions system, a common reason for this is a loose gas cap.
P0128 is indicating that the engine is not coming up to operating temperature, a common reason for this is a stuck open thermostat.

Oct 12, 2010 | 2004 GMC Envoy

1 Answer

My inspection failed for emission. i received two codes. P0455 and P0410. What are these for?


p0410 code pos causes loose or broken hose on smog pump or bad check valve on exhaust man were smog hose atatches

Jun 15, 2010 | 2004 GMC Envoy

1 Answer

Code p0455 evap emission (large)


have the gas cap tested or just replace it, then disconnect the battery for 5 minutes to reset the code, then drive it for a few miles and see if problem comes back, if it does a trip to the dealer is in order, as this may be covered by your emission warranty which is good for 70,000 miles.

May 26, 2009 | 2004 Nissan Titan

1 Answer

The system detected a leak in the evaporative emission system, code P0455 the car is a 2004 Audi A4 Quattro conv 6cyl, 3l.


Replace the gas cap and clear the fault code, most times this clears the issue with code P0455. If it does'nt then you will have to have test equipment hooked up by the dealer to find the leak.

Jul 28, 2008 | 2004 Audi A4

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