Question about Chevrolet Avalanche

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Solutions in fixing engine code 0446 on a 2002 avalanche? I have change the purge valve, Vapor canister and still no joy. Can some tell if I miss anything?

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  • BB1BUD May 11, 2010

    The vent line is plugged or restricted or the vent valve is stuck in the closed position. I would be willing to bet the vent is the problem. try these GM parts:



    15105605

    Bracket, EVAP Emission Canister Purge

    1


    10382105

    Valve, EVAP Emission Canister Control

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  • Master
  • 401 Answers

Check for a blockage in the line or piched if thats ok
then the is a fuel pressure sensor that can cause a p0446
you have to take the fuel tank out and the sensor is on the fuel pump module
you may want to take it and get the EVAP SYSTEM SMOKE TESTED
hope this helps

Posted on Nov 13, 2009

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2002 Nissan Frontier showing a P01444 code


P1444 EVAP Canister Purge Volume Control Solenoid Valve
This system controls flow rate of fuel vapor from the EVAP canister. The opening of the vapor by-pass passage in the EVAP canister purge volume control solenoid valve changes to control the flow rate. The EVAP canister purge volume control solenoid valve repeats ON/OFF operation according to the signal sent from the ECM. The opening of the valve varies for optimum engine control. The optimum value stored in the ECM is determined by considering various engine conditions. When the engine is operating, the flow rate of fuel vapor from the EVAP canister is regulated as the air flow changes.

Feb 11, 2014 | Nissan Frontier Cars & Trucks

1 Answer

2000 Ford Focus...DTC code PO455


code PO455
EVAP Control System Large Leak Detected
Possible Causes:


Aftermarket EVAP hardware non-conforming to specifications Canister vent (CV) solenoid stuck open EVAP canister purge valve stuck closed, or canister damaged EVAP canister tube, EVAP canister purge outlet tube or EVAP return tube disconnected or cracked, or canister is damaged Fuel filler cap missing, loose (not tightened) or the wrong part Loose fuel vapor hose/tube connections to EVAP components Purge sensor or FTP sensor is out of calibration or has failed I would say that your gas cap is a good place to start.

Apr 25, 2012 | 2000 Ford Focus

2 Answers

Check engine lite came on code is p1443 what does this code mean


P1443 Evaporative Emission Control System Control Valve The Evaporative Emission Control System monitors the fuel vapor flow between the engine intake manifold and the EVAP canister. The system failure occurs when a leak or blockage between the intake manifold, the EVAP canister purge valve and the EVAP canister is detected by the PCM.

Code P1443 Possible Causes:

- Pinched, blocked or plugged fuel vapor tubes/hoses (except between fuel tank and EVAP canister)

- Damaged EVAP canister

- Disconnected, cracked or cut fuel vapor tubes/hoses (except between fuel tank and EVAP canister)

- Damaged EVAP canister purge valve

May 04, 2011 | 1997 Ford Escort

1 Answer

1996 Ford Aerostar 3.0 L V-6 Constant check engine light ON Ran codes. Code says vacuum leak on fuel canister. I'd like to change all the vacuum lines. Don't have a good schematic. Haynes manual only...


what codes?

The vacuum lines run from the canister to the intake manifold. One is the purge hose to deliver stored fuel vapor to the intake to be burnd when engine is warm and you are crusing at part throttle. The other line is the vacuum line to operate it.

Fuel Vapor Valve, Aerostar (4.0L Engine) The evaporative emission valve (9B593) uses a small orifice, 1.83mm (0.072 inch), that allows vapors to pass into the vapor line running forward to the evaporative emissions canister (EVAP canister) (9D653). This evaporative emission valve mounts directly into the fuel tank (9002) using a fuel vapor separator seal. Fuel vapors trapped in the sealed fuel tank are vented through the orificed evaporative emission valve. The vapors from the fuel tank leave the evaporative emission valve through a single vapor line and continue to the evaporative emissions canister in the engine compartment for storage.
-----------------------------------------------------
Fuel Vapor Canister Purge Regulator Valve, Aerostar, Ranger Removal and Installation
  1. Disconnect wire harness from evaporative emission canister purge valve (EVAP canister purge valve) (9C915).
  1. Disconnect wire harness from thermistor.
  1. Disconnect evaporative emission canister purge valve assembly from fuel vapor canister and throttle body.
  1. To install, reverse removal procedure.
-----------------------------------------------------------------

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Mar 25, 2011 | Ford Aerostar Cars & Trucks

1 Answer

Describe your Problemcheck engine light codes p0457 p0455


Trouble code P0455-EVAP Control System Large Leak Detected

Trouble Code Conditions:
ECT sensor less than 90°F at startup, engine running, and the PCM detected several small fuel vapor leaks or a large leak in the system.

Possible Causes:

  • Aftermarket EVAP hardware non-conforming to specifications
  • Canister vent (CV) solenoid stuck open
  • EVAP canister purge valve stuck closed, or canister damaged
  • EVAP canister tube, EVAP canister purge outlet tube or EVAP return tube disconnected or cracked, or canister is damaged
  • Fuel filler cap missing, loose (not tightened) or the wrong part
  • Loose fuel vapor hose/tube connections to EVAP components
  • Purge sensor or FTP sensor is out of calibration or has failed

Jan 22, 2011 | 2006 Ford Explorer

2 Answers

Ford escort wagon 1997 code p1443 displayed. what does this indicate & where is the cannister? thank you.


P1443 - EVAP Control System / Vacuum System Purge Control Solenoid Or Purge Control Valve Fault. A fuel tank pressure change greater than minus (-) 7 inches of water in 30 seconds occurred with a purge (fuel vapor) flow at less than 0.02 pounds per minute.

Possible Causes:
  • Blocked fuel vapor hose between the EVAP canister purge valve and the FTP sensor.
  • Blocked fuel vapor hose between the EVAP canister purge valve and the engine intake manifold.
  • Blocked vacuum hose between the EVAP canister purge valve solenoid and the engine intake manifold.
  • EVAP canister purge valve stuck closed (mechanically).

  • Possible Solution:
    Check for blockages between the fuel tank, the EVAP canister purge valve, and the engine intake manifold. Check for obstructions in the EVAP canister purge valve diaphragm and ports.

    The canister is on the passengers side near the firewall if I recall correctly.

    Jan 18, 2011 | Ford Escort Cars & Trucks

    1 Answer

    Obd-2 code p1455


    DTC P1455 - Substantial Leak or Blockage in Evaporative Emission Control System

    The PCM monitors the complete EVAP control system for no purge flow, the presence of a large fuel vapor leak or multiple small fuel vapor leaks. The system failure occurs when no purge flow (attributed to fuel vapor blockages or restrictions), a large fuel vapor leak or multiple fuel vapor leaks are detected by the EVAP running loss monitor test with the engine running (but not at idle).

    Check this possible causes:
    After-market EVAP hardware (such as fuel filler cap) non-conforming to required specifications
    Disconnected or cracked fuel EVAP canister tube, EVAP canister purge outlet tube or EVAP return tube
    EVAP canister purge valve stuck closed
    Damaged EVAP canister
    Damaged or missing fuel filler cap
    Insufficient fuel filler cap installation
    Loose fuel vapor hose/tube connections to EVAP system components
    Blockages or restrictions in fuel vapor hoses/tubes (items also listed under disconnections or cracks)
    Fuel vapor control valve tube assembly or fuel vapor vent valve assembly blocked
    Canister vent (CV) solenoid stuck open
    Mechanically inoperative fuel tank pressure (FTP) sensor


    Check for audible vacuum noise or significant fuel odor in the engine compartment or near the EVAP canister and fuel tank

    Tell us news.

    Jul 19, 2010 | 1996 Ford Explorer

    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

    1 Answer

    Im getting a P0441 EVAP emission control system purge flow fault code on my 2002 dodge neon


    Here is what I could find for your code error as potential causes:
    After market parts and accessories nonconforming to the EVAP system specifications.
    Damaged, missing or improperly installed fuel filler cap.
    Blockage in fuel vapor hoses/tubes (EVAP canister tube, EVAP canister purge outlet tube or EVAP return tube) in EVAP system.
    Disconnected or cracked fuel vapor hoses/tubes in EVAP system.
    EVAP canister purge valve stuck closed.
    Canister vent (CV) solenoid stuck open.
    Fuel tank pressure (FTP) sensor malfunction.
    EVAP canister leaking.
    Fuel vapor control valve tube assembly blocked.
    Fuel vapor vent valve assembly blocked.

    Obviously the gas cap would be the easiest and cheapest thing to fix.  Just make sure it is put on correctly and tight.  If it is not that, I would have to suggest to take it to a mechanic because the other problems on that list are not really DIY material.  Hopefully it is the gas cap and you can take care of it yourself.  Good luck.

    May 17, 2009 | 2002 Dodge Neon

    1 Answer

    Check engine light is on for emission evaporator failure-large


    P0455 - EVAP Control System Leak Detected (No Purge Flow or Large Leak) The PCM monitors the complete EVAP control system for no purge flow, the presence of a large fuel vapor leak or multiple small fuel vapor leaks. The system failure occurs when no purge flow (attributed to fuel vapor blockages or restrictions), a large fuel vapor leak or multiple fuel vapor leaks are detected by the EVAP running loss monitor test with the engine running (but not at idle).
    • After-market EVAP hardware (such as fuel filler cap) non-conforming to required specifications
    • Disconnected or cracked fuel EVAP canister tube, EVAP canister purge outlet tube or EVAP return tube
    • EVAP canister purge valve stuck closed
    • Damaged EVAP canister
    • Damaged or missing fuel filler cap
    • Insufficient fuel filler cap installation
    • Loose fuel vapor hose/tube connections to EVAP system components
    • Blockages or restrictions in fuel vapor hoses/tubes (items also listed under disconnections or cracks)
    • Fuel vapor control valve tube assembly or fuel vapor vent valve assembly blocked
    • Canister vent (CV) solenoid stuck open
    • Mechanically inoperative fuel tank pressure (FTP) sensor
    Check for audible vacuum noise or significant fuel odor in the engine compartment or near the EVAP canister and fuel tank. ----------------------------------------------------------------------------- HX43 DTC P0457: CHECK FOR MISSING OR LEAKING FUEL FILLER CAP
    • Check for missing fuel filler cap.
    • Check for loose fuel filler cap.
    • Check for possible cross-thread fuel filler cap condition.
    Is a fault present concerning the proper installation of the fuel filler cap? Yes No REPLACE cross-threaded or damaged fuel filler cap. RECONNECT and TIGHTEN the fuel filler cap only one eighth turn so that the cap initially clicks by sound or touch. CLEAR Continuous Memory DTCs. COMPLETE an Evaporative Emission Running Loss Monitor Repair Verification Drive Cycle (refer to Section 2 , Drive Cycles). RERUN Quick Test . If DTC P0455 or P0457 is present, Go to HX44 . CLEAR Continuous Memory DTCs. COMPLETE an Evaporative Emission Running Loss Monitor Repair Verification Drive Cycle (refer to Section 2 , Drive Cycles). RERUN Quick Test .

    For DTC P0455 still present: Go to HX44 .

    Otherwise, INFORM the vehicle owner that it is important and necessary to immediately install the fuel filler cap after every refueling event. HX44 DTC P0455: VISUAL INSPECTION FOR SUBSTANTIAL EVAPORATIVE EMISSION SYSTEM LEAKS
    • Check for missing fuel filler cap. If the cap is loose DO NOT DISTURB EVAP system.
    • Verify that both the input port vacuum hose and EVAP return tube are attached to the EVAP canister purge valve. Note: If the EVAP canister-CV solenoid assembly is not accessible during this pinpoint test step, GO to Evaporative Emissions, Section 303-13 in the Workshop Manual for removal and installation instructions.
    • Verify that the CV solenoid is properly seated on the EVAP canister (if possible).
    • Visually inspect for disconnected or cracked fuel vapor hoses/tubes between the intake manifold, the EVAP canister purge valve, the EVAP canister, the fuel vapor vent valve assembly and if applicable the fuel vapor control valve tube assembly.
    • Check for damage to the fuel filler pipe and the fuel tank.
    Is a fault indicated? Yes No CONNECT or REPLACE fuel vapor hoses/tubes as required. REPLACE damaged EVAP system components (fuel filler pipe, fuel vapor vent valve assembly, fuel vapor control valve tube assembly, EVAP canister purge valve, FTP sensor and EVAP canister-CV solenoid assembly) as necessary. REFER to Evaporative Emissions, Section 303-13 in the Workshop Manual for removal and installation instructions. GO to HX45 . GO to HX45 . HX45 DTC P1443 and P0455: CHECK FOR EVAPORATIVE EMISSION SYSTEM LEAKS
      Note: When checking for leaks or blockages in the EVAP system, energize (close) the canister vent (CV) solenoid through the scan tool for a maximum of nine minutes per pinpoint test step. Then de-energize the CV solenoid prior to performing the subsequent pinpoint test step. This is done to assure proper closing of the solenoid.
    • Disconnect and plug the EVAP return tube (EVAP canister purge valve to intake manifold) at the intake manifold vacuum source.
    • Connect scan tool.
    • Key on, engine off.
    • Access VPWR PID. If the voltage is not 12 volts or greater, GO to HX61 .
    • Locate evaporative test port [marked EVAPORATIVE SERVICE PORT DO NOT USE UNREGULATED PRESSURE ABOVE 6.89 kPa (1 PSI)] near EVAP canister purge valve or EVAP canister.
    • If vehicle is not equipped with the evaporative test port, GO to HX50 .
    • Install the Rotunda Evaporative Emission System Leak Tester 310-F007 (134-00056) or equivalent at the evaporative test port.
    • Close CV solenoid by accessing Output Test Mode on the scan tool.
    • Select ALL OFF mode and push START button.
    • Regulate the nitrogen or argon gas pressure on the tester to 3.48 kPa (14 in-H 2 O).
    • Follow the instructions that come with the EVAP System Leak Tester and pressurize the EVAP system.
    • Perform the EVAP system leak test.
    Does the pressure on the EVAP system stay above 1.99 kPa (8 in-H 2 O) and pass the leak test? Yes No GO to HX46 . REMOVE the EVAP System Leak Tester from the evaporative test port and REINSTALL the test port cap. GO to HX50 .

    Apr 15, 2009 | 1999 Lincoln Town Car

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