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2007 Toyota Tundra 5.7 code P0453 I changed the purge valve that's next to the big intake Manifold on top of the engine but the light stays on even after I cleared the code Please help me thanks

Posted by franko on

  • franko
    franko Jun 30, 2020

    Thanks I changes the vsv and the air pumps in the back bumper but I can't find the map sensor I search the internet and it end up with nothing on where it is then I end up with mass air flow sensor answers but I cleaned that too can u show in Pic if u can on where is the map sensor is thanks



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Mike Duffy

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  • Toyota Master
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You don't need a MAP sensor when you have a MAF. The emission valve you're looking for is probably on or near the charcoal canister.

Posted on Jun 30, 2020

  • franko
    franko Jul 01, 2020

    Thanks Mr. Duffy I'll let u no if I fou d thanks so much for the help



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Mike Butler

  • 6674 Answers

SOURCE: OBD code 0401 (1997 Toyota Camry 4 cyl)

There is a VSV (vacuum switching valve) , usually mounted on the back side of engine block, under the intake manifold, as well as the map sensor, that can also cause that code if one or the other is faulty. It takes some pretty detailed troubleshooting to confirm this in some cases, so if that's not in your line of work, you may have to have it properly diagnosed, or take a 50/50 shot at which one first.

Posted on Jan 24, 2009



  • 918 Answers

SOURCE: My 2007 Toyota Tundra 4.7l shows VSC OFF lights

check air filter for dirty , how many miles or kms have your car? , maybe need to replace spark plugs, try to reset the ecu for a momentany malfunction, remove the negative battery terminal few minutes and reconnect,start engine and drive, check if lights goes off , please write me

Posted on Jul 05, 2009


  • 184 Answers


Specifically the Fuel Tank Pressure sensor. Details at P0453

Posted on Nov 11, 2009


  • 79 Answers

SOURCE: engine light stays on after changing 02 sensor on

did u change the right o2 sensor there is 2 sensors on bank1 and 2 on bank2.....upstream and down stream.....i had the same prob i changed the o2 senser to the other side to check and make sure it was the o2 took 4 o2 sensors before i got 1 that finally worked nd yes i was buying them brand change sides with it nd see if the code changes sides....and did u reset it with the code machine when u put the new 1 in?

Posted on Mar 28, 2010

Testimonial: "i wont no if this is a successful answer until i can reset the code thank you"


ZJ Limited

  • 17970 Answers


DTC P0496 - Evaporative Emission (EVAP) System Flow During Non-Purge

If the EVAP purge valve does not seal properly, fuel vapors could enter the engine at an undesired timing causing drivability concerns. The control module tests for this by commanding the EVAP purge valve OFF closed and vent valve ON closed, sealing the system, and monitoring the FTP for an increase in vacuum. If the control module detects that Evap system vacuum increases above a calibrated value, DTC P0496 will be set.

This could be a sign that your purge valve is intermittently failing so you might want to get it checked out before it turns into a bigger problem that affects the drivability of your truck.

EVAP is located behind the throttle body, near the front of the engine...


Fig. Front engine compartment view-4.8L, 5.3L, 6.0L and 6.2L engines (1) Throttle Body (2) Manifold Absolute Pressure (MAP) Sensor (3) Evaporative Emission (EVAP) Canister Purge Solenoid Valve (4) Knock Sensor (KS) (5) Engine Block Heater (6) Engine Coolant Temperature (ECT) Sensor (7) Camshaft Position (CMP) Sensor (8) Generator (click for zoom)

The first step would be to simply clean the valve and see if that helps. The purge valve will be an inexpensive part (probably $20.00 or so) so I'd usually just replace it instead of trying to test it to thoroughly. I've found it can be a somewhat tough part to come by a third party dealers (Napa, Autozone, etc.) So you might have to contact your local GMC dealership parts department to buy the part.

The best thing to do would be to ask the person at the repair dept who sells you the part to copy the page with the replacement guidelines from the service manual. You usually won't have any trouble getting them to do this and then you'll have a good written copy to follow while you change the valve.

The other option would be to have a local mechanic do the replacement for you.

Hope helps.

Posted on Nov 04, 2010

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I would like to know what the code PO455 on a 2007 Mitsubishi Endeavor means.

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
help.jpg What does this mean? 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.
help.jpg What does this mean? When is the code detected?
Evaporative Emission System (EVAP) control system has a very large leak such as fuel filler cap fell off, EVAP control system does not operate properly.
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Possible a noticeable fuel odor caused by the release of fuel vapors
P0455 Mitsubishi Description
This diagnosis detects leaks in the Evaporative Emission System (EVAP) purge line using engine intake manifold vacuum. If pressure does not increase, the Engine Control Module (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.

Read more:


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Check engine light came on, took it to auto zone. P2441 was the result. Is this something I can do or will I need to take it to a mechanic. Thanks

That code indicates a problem with the secondary air injection valve.
On the Tundra, it is under the intake manifold. Its location on the Tacoma will depend on whether you have the 2.7 or 4.0.
It was quoted as a $750 job on a Tundra, user did it himself for about $300 in parts.

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How repair idle control valve for toyota tundra 200

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What is code p1443 on 96 thunderbird

PCV valve would have nothing to do with it !
P1443 - Very Small Or No Purge Flow Condition A fuel tank pressure change greater than a minus (-) 7 inches of H 2 O in 30 seconds has occurred with purge (fuel vapor) flow less than 0.02 pounds per minute.
  • Blocked fuel vapor hose between EVAP canister purge valve and FTP sensor.
  • Blocked fuel vapor hose between EVAP canister purge valve and engine intake manifold.
  • Blocked vacuum hose between EVAP canister purge valve-solenoid and engine intake manifold.
  • EVAP canister purge valve stuck closed (mechanically).
Check for blockages between the fuel tank, EVAP canister purge valve and engine intake manifold. Check obstructions in the EVAP canister purge valve diaphragm and ports.
Suggest you buy a repair manual if you want to try an fix yourself .Or Go to ford web site Ford Oem1stop com an pay 29 bucks for 72 hours for repair info . Or take it to a qualified repair shop an have it smoke tested . Or goolge purge valve for a pic. an see if you can find it under the hood .

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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.

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    Check engine light continues to come on even after replacing gas cap. Where is the evap Solenoid valve located on a 2007 gmc Yukon 5.3 L engine?

    when u are infront of the car. exact location front side of the intake manifold,,,,,,,evaporative emission canister purge solenoid valve,5.3 L engine gmc yukon.

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    Check Engine Light came on, it was diagnosed as error code P0441 what does that mean

    The Diagnostic Trouble Code table says for P0441 Evap Ctrl System Incorrect Purge:

    General Description

    The evaporative emission control system prevents hydrocarbon (HC) vapors from the fuel tank2_bing.gif from escaping into the atmosphere where they could form photochemical smog. Gasoline vapors are collected in the charcoal canister. The ECM controls the Purge Control Solenoid Valve (PCSV) to purge any collected vapors from the canister back to the engine for combustion. This valve is actuated by the purge control signal from the ECM and controls fuel2_bing.gif vapor from the canister to the intake manifold.
    DTC Description

    During "test of vapour generation" a new value from the tank pressure sensor is measured and compared with the start pressure at beginning of "test of vapour generation".
    The ECM sets DTC P0441 if the pressure signal decrease occurs and the difference is below the predetermined threshold. If same error code is set in the next driving cycle, the ECM illuminates the MIL.

    Unfortunately, this is not the 'turn gas cap 3 clicks" fault. Your likely cause is the PCSV valve is sticking in the open position.

    Your test inspection procedure is:

    System Inspection
    PCSV Inspection
    1. Ignition "OFF" .
    2. Disconnect the hose leading from the PCSV to the intake manifold at PCSV.
    3. Using a vacuum pump, apply specified vacuum(Approx. 15 in, Hg) to the manifold side of the valve and verify PCSV holds vacuum.
    4. Ignition "ON" & Engine "OFF".
    5. Install scantool and select "EVAP PURGE VALVE" on the Actuation Test mode.
    6. Activates "EVAP PURGE VALVE" by pressing "STRT(F1)" key.
    7. Verify PCSV release vacuum while valve is activating(should hear a faint click from PCSV).
    8. Repeat this procedure 4 or 5 times to ensure PCSV reliability.
    9. Is PCSV working properly?
    ? Thoroughly check fuel vapor hoses and hose clamp and replace as necessary. Go to "Terminal and connection inspection" procedure.
    ? Thoroughly check fuel vapor hoses and hose clamps between PCSV and intake manifold. Repair as necessary.
    If OK, test with a new PCSV and check for proper operation. If problem is corrected, replace PCSV and go to "Verification of Vehicle Repair" procedure

    I realize you probably do not have a ScanTool, as this is a dealer testing console. You should start by inspecting the hoses and connection to the PCSV.

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