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Emissions control line has a leak. How can it be repaired?

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Depends on what needs to be resolved in the
Evap System & what codes you have


You didn't say what the problem was in detail

Posted on Jan 22, 2013

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Posted on Jan 02, 2017

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SOURCE: 02 mustang with "p0455 evap

You can follow every hose to find a crack or loose hose
The best, is a smoke machine,you'll be done in 15 minutes

You may get a shop, with a subcription to Alldata,Indentafix,Mitchell,etc,to print what you need,other wise you got to pay a shop to diagnose and repair,I'm guessing that is your best option

Take your gas cap in to a shop to be tested

Posted on Oct 22, 2010

  • 14585 Answers

SOURCE: P0442-Evaporator emission control system leak(small

The purge solenoid is by the engine and is connected to the vacuum system. Check the vacuum lines going to this and the lines that may be connected to the vacuum port it comes from. Check for seals on the solenoid if it is directly in the intake manifold. Other things to check are the lines (plastic) that go to the charcoal canister and fuel tank. If the light has been on for a while I would start with the pugre solenoid. If you have a vacuum leak there it would go from small to gross.
Small leaks are checked by the ECM constantly, gross leaks are some that has broke/cracked.

Posted on Jun 28, 2011

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3 Answers

Computer diagnosis P0420


P0420 SUBARU - Catalyst System Efficiency Below Thresholdxicon.jpghttp://engine-codes.com/p0420_subaru.htmlForum CodePossible causes- Three way catalyst converter Bank 1
- Exhaust tube
- Intake air leaks
- Fuel injectors may be faulty
- Fuel injector leaks
- Spark plugs may be faulty
- Improper ignition timing
- Engine Control Module (ECM) Tech notes The most common cause is the three way catalytic converter Bank 1 is worn out. Changing just the catalyst O2 sensor usually does not repair the problem. If the P0420 code is combined with other codes, try fixing the other codes first.

Aug 20, 2012 | 2002 Subaru Outback

1 Answer

P0442-Evaporator emission control system leak(small leak) P0455-Evaporator emission control system leak(gross leak) Have replaced gas cap with Dodge cap from dealer.


The purge solenoid is by the engine and is connected to the vacuum system. Check the vacuum lines going to this and the lines that may be connected to the vacuum port it comes from. Check for seals on the solenoid if it is directly in the intake manifold. Other things to check are the lines (plastic) that go to the charcoal canister and fuel tank. If the light has been on for a while I would start with the pugre solenoid. If you have a vacuum leak there it would go from small to gross.
Small leaks are checked by the ECM constantly, gross leaks are some that has broke/cracked.

Jun 28, 2011 | Dodge Grand Caravan Cars & Trucks

1 Answer

2000 toyota camry 2.2L obd code p0441


Hi,

P0441: Evaporative Emission Control System - Incorrect Purge Flow

This indicates that a part of the EVAP control system is no longer fuctioning correctly. The EVAP system consists of many parts, including (but not limited to) the gas cap, fuel lines, carbon canister, purge valve, and other hoses.

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.

Possible causes:

  • Bad vacuum switch
  • Broken or damaged EVAP line or canister
  • Open in PCM purge command circuit
  • Open or short in Voltage feed circuit to Purge Solenoid
  • Faulty purge solenoid
  • Restriction in EVAP solenoid, line or canister
  • Corrosion or resistance in purge connector

Possible solutions:

  • Replace Leak Detection Pump / LDP (if applicable to your vehicle)
  • Repair damaged EVAP lines or canister
  • Repair open or short in voltage feed circuit to Purge Solenoid
  • Repair open in PCM purge command circuit
  • Replace purge Solenoid
  • Replace vacuum switch
  • Repair restriction in Evap line or canister or soleniod
  • Repair resistance in purge connector

  • Check ALL the above until you correct the issue. NEVER replace PCM, unless you prove the PCM to be faulty (as a last resort).

    Cheers,

    Jun 08, 2011 | 2000 Toyota Camry

    1 Answer

    1999 saab 9-8 engine code P 0442 what do I look


    CODE PO442 - EVAPORATIVE EMISSION CONTROL SYSTEM LEAK DETECTED SMALL LEAK. LIST THINGS TO CHECK, CHECK FUEL FILLER CAP,CHECK FUEL FILLER PIPE PACKING,CHECK THE DRAIN VALVE,CHECK THE PURGE CONTROL SOLENOID VALVE,CHECK THE PRESSURE CONTROL SOLENOID VALVE,CHECK THE EVAPORATIVE EMISSION CONTROL SYSTEM LINE,CHECK CANISTER,CHECK FUEL TANK,CHECK ALL HOSES FOR DEFECTS LIKE CRACKS, BROKE PLACE OR DISCONNECTED. TO EVAPORATIVE EMISSION CONTROL SYSTEM.

    Feb 20, 2011 | Saab 9 5 Cars & Trucks

    1 Answer

    Po 442 po 455


    P0442 - Evaporative Emissions System Leak Detected (Small Leak)

    P0455 - Evaporative Emissions System Leak Detected (Gross Leak)

    This diagnosis detects leaks in the EVAP purge line using engine intake manifold vacuum. If pressure does not increase, the ECM will check for leaks in the line between the fuel tank and EVAP canister purge volume control solenoid valve under the following vacuum test condition. The vacuum cut valve bypass valve is opened to clear the line between the fuel tank and the EVAP canister purge volume control solenoid valve. The EVAP canister vent control valve will then be closed to shut the EVAP purge line off. The EVAP canister purge volume control solenoid valve is opened to depressurize the EVAP purge line using intake manifold vacuum. After this depressurization is implemented, the EVAP canister purge volume control solenoid valve will be closed.

    Causes:
    - Missing Fuel cap
    - Incorrect fuel filler cap used
    - Fuel filler cap remains open or fails to close
    - Foreign matter caught in fuel filler cap
    - Incorrect fuel tank vacuum relief valve
    - Leak is in line between intake manifold

    Solutions:
    - Re-tighten or replace fuel tank filler cap
    - Replace damaged or leaking EVAP canister
    - Replace damaged or leaking lines.

    Feb 10, 2011 | Chrysler Town and Country Cars & Trucks

    4 Answers

    Hi I have a Dodge Neon 2003 with engine codes P0456 and P0440. What do these mean and how do I fix them


    P0456....Evaporative Emission Control System Leak Detected (very small leak)


    P0440....Evaporative Emission Control System

    Nov 12, 2010 | Dodge Neon Cars & Trucks

    1 Answer

    I have a toyota matrix w/ 88,000 miles 2006. I have the check engine light on, took it to advance auto, codes are PO441- EVAP control system , purge flow-fault also PO455 EVAP system-large leak I don't...


    P0441 Evaporative Emission Control System Incorrect Purge Flow
    OBD-II Trouble Code Technical Description

    Evaporative Emission Control System Incorrect Purge Flow
    What does that mean?

    This indicates that a part of the EVAP control system is no longer fuctioning correctly. The EVAP system consists of many parts, including (but not limited to) the gas cap, fuel lines, carbon canister, purge valve, and other hoses. 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.

    EVAP emission canister purge is contolled by a valve which allows engine vacuum to pull stored fuel vapors from fuel tank into the engine to be burned, rather than be vented to atmosphere. A vacuum switch is used to detect when flow exists. If the PCM commands purge and sees that the switch is closed (indicating no detected purge flow) P0441 is set.
    Symptoms

    Likely, no symptoms will be discernible to the driver, other than the illuminated Check Engine Light.
    Causes

    A code P0441 could mean one or more of the following has happened:

    * Bad vacuum switch
    * Broken or damaged EVAP line or canister
    * Open in PCM purge command circuit
    * Open or short in Voltage feed circuit to Purge Solenoid
    * Faulty purge solenoid
    * Restriction in EVAP solenoid, line or canister
    * Corrosion or resistance in purge connector
    * Bad PCM

    Possible Solutions

    With a P0441 OBD-II trouble code, diagnosis can be tricky at times. Here are some things to try:

    * Common Chrysler fix - Replace Leak Detection Pump / LDP
    * Repair damaged EVAP lines or canister
    * Repair open or short in voltage feed circuit to Purge Solenoid
    * Repair open in PCM purge command circuit
    * Replace purge Solenoid
    * Replace vacuum switch
    * Repair restriction in Evap line or canister or soleniod
    * Repair resistance in purge connector
    * Replace PCM
    THIS IS LIKELY FROM TOPPING OFF THE TANK EACH TIME YOU FUEL UP



    P0455 is similar:

    Technical Description

    Evaporative Emission Control System Leak Detected (no purge flow or large leak)
    What does that mean?

    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

    A code p0455 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

    With a p0455, the most common repair is to:

    * Remove and reinstall the gas cap, have AutoZone 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

    Thanks for using FixYa - a 4 THUMBS rating is appreciated for answering your FREE question.

    Sep 05, 2010 | 2006 Toyota Matrix

    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

    1 Answer

    I have a 2002 Ford Taurus, and an engine sign showed up. However, I pulled out the code which is P0442. what is the problem, how much would that cost me and when do I need to fix it, can I wait for the...


    P0442 code relating to the EVAP (Evaporative Emission System).a small emissions leak. also check the gas cap .Try cleaning the seals first and then try putting a little vaseline on the seals before getting a new gas cap. -------------
    Code P0442-Evaporative emission control system. Canister Purge system failed the monitor test indicating a large leak (over 0.040”). Enabling conditions: Engine running after a 6 to 8 hour engine off period called a cold soak. The test runs when engine load is between 15 to 45% and inlet air temperature between 40 and 130°F. Blocking Action: This code can block the following monitors: Fuel Control, O2 monitor, Catalyst Monitor, misfire monitor. Testing: Check the purge hoses for leaks, leaking vapor management valve or loose gas cap.

    This simply indicates that there was no flow from the evap system when the purge valve was energized. This could be cause of a few different reasons. First, check for leaks by visually looking at all evap lines for cranks rips or any tears. Basically, anywhere that fuel vapors can escape.
    ----------- Here is the test that will smoke the system for leaks with a smoke machine.

    Evaporative Emission System Leak Test

    SPECIAL TOOL(S)

    CAUTION: The evaporative emission system must not be pressurized to more than 3.48 kPa (14 inches H2O)or damage to the evaporative emission system may occur.
    1. Connect the Evaporative Emission System Leak Tester to the evaporative emission test port.
    2. Close the canister vent solenoid.
    3. Pressurize the evaporative emission system to 3.48 kPa (14 inches H2O) .
    4. Monitor the system for two minutes . The system fails the leak test if the pressure falls below 2.0 kPa (8 inches H2O) .
    5. Repair any leaks as necessary.
    6. Repeat the leak test until the system remains above 2.0 kPa (8 inches H2O) after the two-minute test period.
    ---------- get it repaired ASAP because if you drive the car in same condition the emisson system can get damaged.and code will be p0445 ,now the code is p0442 its for leak in the emisson system. ---------------- This will help. Thanks please keep updated.please do rate the solution positively .thank you for using fixya.

    Oct 15, 2009 | 2002 Ford Taurus

    1 Answer

    Failed Emision test


    po442 is evap emission control system leak (small) 1 of the lines for emissions is leaking. po455 is-- emission control system leak (large). turn off light with code scanner after it is fixed.

    Sep 01, 2009 | 2001 Dodge Caravan

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