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Where is the vapour pressure sensor located - 1999 Toyota Camry

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Normal place is under the front wing on the top of the carbon canistor.

Posted on Aug 20, 2010

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1999 sonoma 2.2 with carburator, code P0452 will not start in the morning. add some fuel into carb will start right away?


this is an EVAP pressure sensor code. which should not cause a no start. has to do with emissions vapours

Sep 04, 2014 | Cars & Trucks

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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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What are the symptoms of a bad purge valve?


venting problems resulting in fuel starvation after a period of running, fuel vapour smell, injector faults from excessive pressure , difficulty in filling the tank. Best to run fault codes to find the faulty sensor /unit.

Jul 22, 2014 | 2006 Volkswagen Jetta

1 Answer

What is wrong when you fuel your vehicle and turn the ignition and it does not start?


could of burnt the pump possible as well vapour lock in tank sensor causing to high pressure you can open up the cap of gas tank and try to start it

May 10, 2014 | 2006 Cadillac SRX V6

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My problem is a come and go thing. At times i can get no more than 50 mph when this has happened I have noticed when I remove the fuel cap theres is a lot of pressure released or it is air taken in. It is...


The tank breather is blocked.
The tank needs outside air to enter as the fuel is pumped out, if this is not happening, the tank is pulled into negative pressure and this will prevent the fuel from being drawn at the correct rate.
The tank vent is a pipe from the tank which is then usually attached to the chassis and nothing else. It may have some form of vapour lock on the end to prevent gas fumes from escaping and forming a fire risk. This is the pipe that is blocked or the vapour lock is blocked. Locate it and remove it to clean it but DONT leave the vapour lock off the pipe when you refit it..
Some fuel tanks are vented through the fuel cap and don't have this pipe so check and make sure that the correct cap is fitted. You can also drill a very small hole through the top of the cap which may allow air to enter the tank although this is not advisable as there would be no vapour lock.

Jan 21, 2011 | Dodge Ram 3500 Cars & Trucks

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I replaced my knock sensors the other day truck ran fine for a while then two more codes came up po107 and po449 where should i go know


The two codes may refer to the same fault/ THe p0107 says that the Manifold absolute pressure is wrong in other words the amount of air gaining entry to your inlet manifold is incorrect. The P0449 says that the vent valve on the vapour emission control system is open. I think it is more than likely that the open vent valve is allowing air to be sucked into the inlet manifold and this is also being noted by the MAP sensor. If it easy replace the vent valve. A quick fix just to keep you going until the vent valve can be replaced is to locate the vacuum line supply from the vapour emission control charcoal canister and to clamp it closed. This will remove the MAP sensor error and allow the engine to run as it should. THis is only temporary as the vent valve fault will persist until it is fixed.

Aug 20, 2010 | 2003 Chevrolet Silverado 1500

2 Answers

1998 isuzu rodeo s/ls troble codes p0452


Hi,

This fault code is related to a low pressure signal from your EVAP system which is to do with your purge canisiter system for the fuel vapours etc.

You could have a faulty sensor in this system.

Aug 13, 2010 | Isuzu Rodeo Cars & Trucks

1 Answer

Why does it say check fuel cap


Your fuel system pressure sensor is detecting a vacuum leak. Sometimes it is the cap, sometimes there is a leak in the vapour recovery system. So check your cap. It can reduce your fuel economy. good luck

Jun 13, 2010 | 2000 Mercury Mountaineer

2 Answers

2002 ford taurus hesitats fills like missing computer code say egr sensor changed it but still does it engine light on. fills like lossing spark at all speeds but idle how do you check coil out put? worse...


Find a shop that does scope meter testing. They will be able to give you coil's output.
You may have a faullty plug wire . Take a spray bottle full of water spray it on spark plug wires and see if the engine decreases in idle. If so you need new wires.

With regards to eng lite. have ECU scanned again may be a different code. Autozone does this free of charge.
Did you clean out the carbon on the EGR passage before you put new EGR in?

Apr 24, 2010 | 2002 Ford Taurus

1 Answer

P0450 CODE ON 1997 T100 V6 PICKUP. WHAT IS it and how can I fix it?


Good day
P0450 is Evaporate emission system pressure sensor/switch
the cause could be
1. short or open in the vapor pressure sensor circuit
2.vapour pressure sensor
3. ECM

You can test with the following
you can access the ECM behind the glove box. turn ignition on,backprobe the ECM connector, on A/T models, measure voltage between terminals #1 (green/black wire) and #22 (brown/black wire) at the ECM E6 connector. on M/T models measure the voltage between terminals #1 (green/black wire) and #9 (brown/black wire) at ECM E6. if voltage is 4.5 - 5.5 volts, go to the next step. If the voltage is not 4.5 - 5.5 volts, replace ECM and retest.
2. back-probe ECM connector on A/T models measure voltage between terminals #15 (red/blue wire) and #22 (brown/black wire) at ECM E6. on M/T models measure voltage between terminals #4 (red/blue wire) at ECM E5 and connector #9 (brown/black wire) at ECM E6 connector. on all models disconnect the vacuum hose from the vapor pressure sensor. sensor is located near the brake master cylinder. connect a vacuum pump to sensor. if voltage is 2.9-3.7 volts without vacuum applied and 1.3-2.1 volts with .59 in.Hg (2kpa) vacuum applied. replace ECM and retest if voltage is not as specified go to next step.
3. check for open r short circuit in the wiring harness between vapor pressure sensor and ECM. repair wiring as necessary. if wiring harness is okay replace the vapor pressure sensor.

Hope this helps

Cheers

Jul 13, 2009 | 1997 Toyota T100

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