Question about 2000 Toyota Corolla

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The service engine light came on (2000 corolla) and scanner tool says it is a fuel vapour purge valve problem where do i locate this valave on a 2000 corolla automatic trans

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  • Toyota Master
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In front of the gas tank. You must loosen the exhaust system at various places to drop it low enough to remove the charcoal canister. if it is po446,

Posted on Jul 07, 2010

  • carl Jul 07, 2010

    It's one of the most common error codes which you can run in if you own toyota. It's well known that presence of such code does not mean that something is wrong. First try reseting the computer. If the code, It's well known that presence of such code does not mean that something is wrong. First try reseting the computer. If the code comes back If the code comes back than you have to change the sensor. The sensor is usually attached to the charcoal canister. good luck!! the sensor is expensive at the dealer. so what I would do is try to find one at a local junk yard.

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  • Master
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The common valve for failing on these vehicles is located under the car in the back, directly behind the rear axle. it comes as one unit with the charcoal canister and all the connectors, i believe runs in around the $300 range, and is available only at Toyota dealers. it is held on by 3 bolts that go straight up into the floor, and is fairly simple to change with a few basic tools. please take care when disconnecting the tube and electrical connectors, damaging these will make this job quite a bit more complex.

FYI i had to order one of these parts a few weeks back, in my area the part was actually back ordered about 4 weeks, so make sure you get your hands on one before taking it apart! good luck!

Posted on Jul 07, 2010

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What code is po443


ossible causes
- Faulty Evaporative Emission (EVAP) Purge Solenoid Control
- Evaporative Emission (EVAP) Purge Solenoid Control harness is open or shorted
- Evaporative Emission (EVAP) Purge Solenoid Control circuit poor electrical connection
help.jpg What does this mean?
When is the code detected?
An improper voltage signal is sent to Engine Control Module (ECM) through the valve.
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P0443 Description
The Evaporative Emission System (EVAP) canister purge volume control solenoid valve uses a ON/OFF duty to control the flow rate of fuel vapor from the EVAP canister. The EVAP canister purge volume control solenoid valve is moved by ON/OFF pulses from the Engine Control Module (ECM). The longer the ON pulse, the greater the amount of fuel vapor that will flow through the valve.

Jul 21, 2014 | 2000 Mercury Mountaineer

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EVAP - Fuel Vapour Evaporative Control System


<p><b><span>1.11)<span> </span><span> </span><u>EVAP - Fuel vapour evaporative control system </u>(actuator)<u></u></span></b><br /> <p><span> </span><br /> <p><b><span>What is it?<span> </span></span></b><span>The EVAP system is a collection of pipes and devices designed to prevent fuel vapour emission to protect the environment.<b></b></span><br /> <p><b><span> </span></b><br /> <p><b><span>Where is it located? </span></b><span>Pipes run from the top of the fuel tank to the carbon (vapour trap) canister which can be located between the inner and outer fenders (wings), on the inner fender or on the firewall (bulkhead).<b> </b><span> </span>A pipe connects the canister to the throttle: the pipe exits just in front of the throttle plate.<b></b></span><br /> <p><b><span> </span></b><br /> <p><b><span>How does it work?<span> </span></span></b><span>The EVAP system passively stores the vapour from the fuel tank in a charcoal filled canister.<span> </span>When the engine is running above idle speed the ECU opens a purge valve to the pipe leading to the throttle body.<span> </span>A vent valve allows the ingress of air into the canister and this encourages fuel vapour to be drawn out through the purge valve to be added to the air intake mixture to be burnt.<span> </span>The opening of the purge valve cycles with engine speed.<span> </span>The purge valve should be closed during idle.<b></b></span><br /> <p><b><span> </span></b><br /> <p><b><u><span><span> </span></span></u></b><br /> <p><b><u><span>Symptoms of faulty EVAP</span></u></b><br /> <p><b><span>Associated OBD2 error codes DTCs: <span> </span>P0440 - P0459; P1441</span></b><br /> <p><b><u><span><span> </span></span></u></b><br /> <ul> <li><b><span>Erratic idling - </span></b><span>If the purge valve fails to close the ingress of unmetered air will compromise the ECU's ability to maintain a suitable air/fuel ratio.<b></b></span></li> </ul> <p><b><span> </span></b><br /> <p><b><span>How to check?<span> </span></span></b><span>Simply clamping off the pipe from the EVAP purge valve should result in an immediate improvement in engine idling performance.<span> </span>Remove the purge valve and try to blow through it.<span> </span>If there is resistance then the valve is mechanically OK.<span> </span>Applying voltage to the electrical connections should open the valve and remove any resistance to blowing. <b></b></span><br /> <p><b><span> </span></b><br /> <p><b><span>How to fix?<span> </span></span></b><span>If the valve is jammed open permanently or fails to open when signaled to do so then replace it<b>.<span> </span></b>It may be possible, taking the greatest of care in the process to open the valve to clean it up in the hopes of affecting a repair.<span> </span>If the solenoid, however, shows open-circuit due to an electrical short it is best to replace it.<b></b></span><br /> <p><span><br /></span><br /> <p><span><b>NEXT 1.12) Oxygen (Lambda) sensor</b></span><br /> <p><span> </span><br />

on Jul 22, 2011 | Mercedes-Benz E-Class Cars & Trucks

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Fuel systems on cars


2) Fuel: From tank to engine

The modern fuel tank is fitted with a sealed filler cap. Set within the fuel tank is the fuel level sender which sends a signal to the fuel gauge indicator on the dashboard. Fuel is drawn by a pre-pump (lifter pump),also within the tank, through a filter 'sock' or strainer to prevent bulky debris rom entering the fuel line; the pre-pump maybe located outside but near to thefuel tank. Also connecting to the tank is the fuel return pipe and often on top of the tank can also be found a pressure sensor. Associated with the tank there is often an expansion vessel to accommodate thermal expansion of the fuel. Finally attached to the top of the tank, or top of the expansion vessel, there is a fuel vapour recovery pipe that is part of the evaporative loss emission control system employed to prevent fuel vapour release to the environment (see later in this series).
Fuel is pumped from the tank by the pre-pump through the fuel line towards the engine: on some systems a further 'main' fuel pump may lie between the fuel tank and engine. The fuel, now under considerable pressure, passes through an in-line fuel filter that removes any fine particulates before they reach the engine. A clogged fuel filter puts a strain on the fuel pump so routinely changing the fuel filter can help prolong the pump's service life. On reaching the engine compartment the fuel line connects to the fuel rail mounted on the engine. The injectors feed directly off this pressurized fuel rail. Mounted onto the end of the fuel rail after the injectors is the fuel pressure relief (FPR) valve which governs the fuel pressure in the line all the way back to the fuel pump(s).
The critical component within the FPR is a spring loaded diaphragm whose role is to maintain a constant force on the relief valve. Fuel, pressurized by the action of the fuel pump, is forced against the valve and excess pressure allows fuel to bleed past to the return fuel line back to the fuel tank. Attached to the top of the fuel pressure regulator is a vacuum line connected to the inlet manifold. The vacuum partially offsets the action of the diaphragm spring. When the engine is at idle, the throttle plate is closed and the manifold vacuum is at its greatest (lowest pressure), the strong vacuum sucks back on the diaphragm against the spring pressure allowing a reduction in the fuel pressure needed to open the relief valve. This reduction in fuel pressure helps minimize fuel consumption per each injection cycle when at idle. Conversely, when the engine is running at high speed, the throttle is wide open creating little or no vacuum in the plenum. This reduces the pull back on the FPR diaphragm and consequently the fuel pressure in the fuel rail is at its highest.
In 'common rail' designs the injectors are controlled by the ECU. The ECU controls the injection cycle time (pulse width) and, in very modern systems, the actual injection pattern. When the car is at idle the injection times are short and when under load the injection times are longer. Similarly when the engine is cold (as indicated by the engine coolant sensor to the ECU) the injection times are longer to ensure a richer starting mixture. The combination of injection time, along with the fuel pressure in the fuel rail, dictates the engine speed and fuel consumption.
In recent years evaporative loss emission control systems (EVAP) have been introduced to prevent the escape of fuel vapour from cars. The fuel vapour that evaporates from the surface of the fuel in the tank is conveyed by the vapour relief pipe to a charcoal filled canister. The fuel vapour is stored in the charcoal for later use by the engine. Access to the stored vapour held in the canister is controlled by electrically operated valves. When the engine is cold the charcoal canister purge valve is kept closed. At normal operating temperature (signalled from the coolant temperature sensor to the ECU) the purge valve opens allowing the stored vapour to contribute to the air in the inlet manifold. The charcoal canister also has a vent valve operated either electrically or passively, in response to internal pressure drop, which when open introduces fresh air to help flush residual vapour out of the charcoal canister.
NEXT 3) Spark: from battery to spark plug

on Jul 15, 2011 | Mercedes-Benz E-Class Cars & Trucks

1 Answer

Where is the vapour canister purge solenoid located on a 2000 toyota solara


The purge valve is located under the hood near the air filter, one of the hoses has a green valve with a cap on it.

Jan 16, 2014 | 2000 Toyota Camry Solara

1 Answer

I was told by a mechanic that my 2006 Saturn Ion needed a purge soleniode and vaccum canester. The gas sap light and engine light stays on. I replaced gas cap and they went out for couple of days now back...




The purge solenoid valvend canister are part of the EVAP system. The automatic diagnostic method tests the integrity of the EVAP system for leaks by pressurizing everything and then checking to see if pressure is lost. The filler cap is the main seal to the gas tank and if this is loose then compromises the ability of the system to be pressurized. Put a film of grease around the rubber seal and fit the cap tightly.

The following is a brief overview of the system (any spelling anomalies are due to my British background). I hope you find it helpful :-



What is it? The EVAP system is a collection of pipes and devices designed to prevent fuel vapour emission to protect the environment.


Where is it located? Pipes run from the top of the fuel tank to the carbon (vapour trap) canister which can be located between the inner and outer fenders (wings), on the inner fender or on the firewall (bulkhead). A pipe connects the canister to the throttle: the pipe exits just in front of the throttle plate.


How does it work? The EVAP system passively stores the vapour from the fuel tank in a charcoal filled canister. When the engine is running above idle speed the ECU opens a purge valve to the pipe leading to the throttle body. A vent valve allows the ingress of air into the canister and this encourages fuel vapour to be drawn out through the purge valve to be added to the air intake mixture to be burnt. The opening of the purge valve cycles with engine speed. The purge valve should be closed during idle.


Symptoms of faulty EVAP

  • Erratic idling - If the purge valve fails to close the ingress of unmetered air will compromise the ECU's ability to maintain a suitable air/fuel ratio.


How to check? Simply clamping off the pipe from the EVAP purge valve should result in an immediate improvement in engine idling performance. Remove the purge valve and try to blow through it. If there is resistance then the valve is mechanically OK. Applying voltage to the electrical connections should open the valve and remove any resistance to blowing.


How to fix? If the valve is jammed open permanently or fails to open when signaled to do so then replace it. It may be possible, taking the greatest of care in the process, to open the valve to clean it up in the hopes of affecting a repair. If the solenoid itself, however, shows 'open-circuit' due to an electrical break it is best to replace it.

Mar 15, 2011 | 2006 Saturn ION

1 Answer

The troubleshooting code is po440. It says the probale cause can be a loose fuel cap,checked that, an evap canister or hose cracked-not connected,purge or vent solenoid defective, or a vacuum leak at the...


A leak in the EVAP system can be a pain to resolve so be methodical. Start with the junction of the tube from the purge valve to the inlet manifold plenum. Disconnect this tube and block off the exposed port on the manifold. A great way for blocking off tubes and ports is to cut off the fingers of a rubber washing up glove and elastic bands to secure them over the exposed ends. First let us recap on the system. The EVAP system passively stores fuel vapour from the fuel tank in a charcoal filled canister. The canister can be located on the fender or bulkhead. When the engine is running above idle speed the ECU opens a purge valve connecting a pipe to the throttle body. A corresponding vent valve allows the ingress of air into the canister and this encourages fuel vapour to be drawn out of the canister through the purge valve to the throttle air intake mixture and thereafter to be burnt. The opening of the purge valve cycles with engine speed. The purge valve should be closed during idle. A faulty EVAP system manifest itself as erratic idling as it allows un-metered air into the system and compromises the inlet manifold vacuum. The blocking of the ports as initially suggested above should at least cause any erratic idling to be resolved. The EVAP system is not critical to engine performance, it is an emission control device, so the car may be run without issue until the fault is found. Look at the fuel cap, ensure that the rubber seal is intact. To make doubly sure give it a smear of grease. Next look at the disconnected 'purge valve to throttle' tube. Inspect it thoroughly for cracks, be quite rough and twist it around to get a good look. Now locate the purge valve. If it is electrically operated simply check for voltage continuity across its connector pins. An open circuit indicates a burnt out solenoid winding. Check the connection to the canister. Check the vent valve connections, and again check its electrical continuity. Check the tank to canister tubing and any connections. If you find no leaks you may need to take it to a garage that can do a smoke test on the system - this highlights the leaks as wisps of smoke appear where the leaks occur.

Dec 01, 2010 | 1997 Chevrolet Lumina

2 Answers

Check engine light came on. Failed inspection they said it was the cannister purge valve. They want $462 to repair. My husband has alot of engine repair knowledge, can he fix it


The purge valve is the small electrical valve that allows the ECU to let fuel vapours trapped in the charcoal canister to be released down a pipe to the inlet manifold for inclusion in the combustion process when the throttle is open. The replacement part will be much, very much cheaper than $462 and once located is very simple to exchange. The swap should take no longer than half an hour at most. The valve is a small electrical device (often circular in shape) that lies on the pipe from the charcoal EVAP canister to the inlet manifold plenum. The valve cycles on and off according to how the engine is being used. The purge valve does not open during idle (when throttle is closed) as this would compromise the inlet vacuum engine at this slow speed and upset the smooth running. If, as you say, your husband has good repair experience then this will be one of his easier jobs.

Sep 28, 2010 | 1998 Toyota Corolla

1 Answer

I have a 2001 Toyota Corolla Engine light on and stay When out side tempereture is cole. I pull out EFI fuse and put it back start engine and no Engine light over 70 deg. out side temp. It's come back in...


As with most cars today your car is fitted with a charcoal filled canister to trap fuel vapour emissions before they are released to the environment. In order to burn this temporarily stored vapour the engine computer opens a purge valve that is connected by a vacuum tube to the inlet manifold of the engine. The valve is only opened when the engine has warmed up. With the valve open outside air is drawn into and through the charcoal canister to carry the fuel rich vapours down the vacuum tube into the engine to be burnt. In your car the purge valve is being left open permanently and this means your car is struggling with all the extra air entering the engine. Solution: find the tube connected between the inlet manifold and the charcoal canister and disconnect it and block both open ends temporarily (duct tape) so that nothing can pass through it . This is only a temporary solution until you can replace or repair the faulty purge valve. When repaired open the vacuum tube connection again.

Sep 09, 2010 | Toyota Corolla Cars & Trucks

1 Answer

The code is po455.my check engine light is on and sometimes when i start it it seems like it cranks forever before it starts


Hi
The code P0455
Check for a faulty fuel cap,
Damaged pinch or blocked EVAP purge line ,
Fuel Vapour lines pinched or blocked ,
EVAP canister purge line ,or vent valve malfunction .

If no damage can be found ,could of been your fuel cap was not replaced correctly at the last fuel fill up.

Regards Indy

Aug 17, 2010 | Chevrolet Equinox Cars & Trucks

1 Answer

2001 chevy impala code p0446


This is an indication of a fault with fuel evaporative control system. The system consists of vapour coming off from 'sealed' (always check that your gas cap is on good and tight after refills) fuel in the tank being trapped in a carbon filled canister or trap. Also fitted to this trap is a vent tube with a solenoid operated valve to the atmosphere and a purge tube with a solenoid operated valve to the inlet manifold. When the engine cold the purge valve remains closed. Once warmed up the purge valve opens to allow fuel vapour to contribute to the intake to the engine. When the engine revs higher the vent valve opens to allow external air to help flush out vapour from the trap to the engine. The error code says that there is an error with this vent valve (most likely that it is not opening when it should). To check put a voltmeter across the electrical contacts on it and just check for resistance /continuity. If there is no continuity the solenoid has most likely burnt out. A further check is to apply 12volts across the electrical contacts and this should be seen to open and close the valve. If you find that this fault is any way affecting the function of the car, as a temporary measure simply block the purge tube as it enters the inlet manifold (sometimes on the throttle body). This is only a temporary fix as if left like this it will fail its next test.

Jun 23, 2010 | 2001 Chevrolet Impala

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