6

I was able to find the exact verbiage on Amazon for a Toyota gas cap. It implies that you will get a CEL (check engine light) and you could, which could cost you money to get it checked out. Here is the listing: Genuine Toyota (77300-33070) Fuel Tank Cap Assembly by Toyota Genuine OEM Toyota Gas Cap New in Original Packaging with Seal. The typical ...


4

The evap test system creates a vacuum in the fuel system in order to check for integrity. The cap check light comes on when there is air leak somewhere in your system - it might be tank or cap or something else. If you have replaced the cap, sometimes new caps don't fit properly and leak some air inside the tank, or you could actually have a hole in the tank,...


4

The OBD2 code P0442 means that on your system you have a small air/vacuum leak. Apart from the seal on the gas gap, you must check the purge valve and the fuel tank pressure sensor are both working correctly. EVAP faults can be be notoriously difficult faults to pinpoint as the system only checks itself when the vehicle is actually operating and the ...


3

The ECU (Engine Control Unit, ie. computer) runs a bunch of tests, and stores any errors it encounters. Because an error was detected and the ECU has not been reset, the emission testing device read the error code which was still stored in the ECU. You should Reset the computer by clearing it with an ODB2 reader, disconnecting the battery, or pulling the ...


3

I've never seen replacing the fuel cap as any part of the maufacture recommend maintenance. Some vehicles now don't even have one, the seal is made internally or by the fuel hatch door. Once on an older vehicle, I had the service engine light come on because of the fuel cap seal. I couldn't find a replacement cap or O ring to fit, so I just took the seal ...


3

Are these instructions accurate? These instructions sound accurate to me. Would Vaseline-brand 100% pure petroleum jelly (the one used for baby diaper rash) be a suitable "petroleum-based lube" or is a car-specific product needed? Absolutely. And if I use a 100% cotton fabric to clean the top of the gas tank, does this suffice to minimize the chance ...


3

Locking and unlocking the car while applying a little pressure on the flap worked for me 👍. Repeat if it doesn't work the first time.


3

Have you checked for a blown fuse? You may also be able to reach the release either by reaching into the wheel well or removing an interior panel. Another option is that the latch is released but the spring that pops the door open is broken. Have an assistant try to open the door while you actuate the switch.


3

There is know way to know how the software was programmed for any given car, from that I know most systems will not do a fuel tank integrity vacuum check when the tank is either past 3/4 or below 1/4, so filling the tank will extend the time before it re-runs the test and turns off the CEL if the test passes. The test will only run when the tank is between 1/...


3

Unless the price difference is outrageous, you're probably better off sticking with OEM. The reason being is that aftermarket caps (even by reputable brands) can leak, and based on what I remember hearing on Car Talk, it's not unusual. Leaking is bad because your emissions system can't work properly and you'll end up getting a check engine light. The other ...


2

The gas cap you are looking at is a fairly generic gas cap. However, not just any one will fit on. If you get a gas cap from one of the following vehicles, it should fit: 2006-2012 Chevrolet Impala 2005-2012 Chevrolet Malibu 2005-2010 Chevrolet Cobalt 2006-2010 Chevrolet HHR 2007-2010 Pontiac G5 2005-2010 Pontiac G6 2006-2009 Buick Allure 2006-2009 Buick ...


2

Slow or no flow for fuel in means no or low vapor flow out the vent system. Steps to test for testing for a blocked vent: Remove the CAN VENT fuse, #64 in the Underhood Bussed Electrical Center (UBEC). Recheck fuel fill. If now OK, check the White evaporative vent solenoid wire for a short to ground, between the evaporative vent solenoid on top of the ...


2

Get in the car and lock all doors using the switch on the drivers door. Then unlock all doors using switch on the key. I found that this worked and the flap would then open when pushed as normal.


2

There is another important function of the fuel cap, it helps control flammable vapors. An example would be if you parked a car inside a hot garage baking in the summer sun. There would be an ignition risk from the enclosed place filled with gasoline vapors leaking out of the open gas tank.


2

There a several things, that I would check at first. Gas cap or the seal on it. The connection between gas tank and gas cap. The seal between gas tank and the fuel pump under the rear seat. Can not believe, there could be the leak somewhere else.


2

Here is the explanation for the P0404 code, which is a generic code: If you have a P0404, then the EGR valve is likely an electrically controlled EGR valve instead of a vacuum controlled EGR valve. Also, the valve will usually have a feedback system built into it that informs the PCM (Powertrain Control Module) what position the valve is in; open, closed, ...


1

There should be a plastic access panel in the boot (or "trunk" if you're in the US) near the rear light cluster behind where the fuel filler door is, pop that off and you should be able to see the cable and you can pull that down and it should release the catch and open the door. Alternatively you can use a credit card to wedge in where the catch is and ...


1

There is always some air in the tank. The gas cap is part of the evaporative emission control system that is trying to prevent leaks of fuel vapor from escaping into the atmosphere. Yes, it can cause the check engine light to come on. If you have a code reader you can plug into your ODBII port in the cab of your car there are some common codes that get ...


1

There may be a breather tube that has become nipped causing the "vacuum". There will always be a design feature that keeps the tank pressure close to atmospheric as the fuel gets used so if something goes wrong with that a low pressure situation will be created


1

We have found a common failure with the canister vent valve on Mazda 3 and 5 of varying years. Last week we did 1 and this week we have 2. All with a code of P0442. This code is normally set after filling up gas and driving roughly 100 miles. The vent valve is located near the gas tank under a shield.


1

P0404 DTC is your EGR valve control circuits are incorrect. Your EGR valve may be staying open or staying closed. The EGR system needs to be checked and rectified. Leaving this repair is not a good idea. The next fault it will cause will be to destroy your DOC, (diesel oxidation catalyst). This will be followed by your DPF, (diesel particulate filter). As ...


1

I had this problem with my 2013 Passat wagon. I took the car to the dealer and the mechanic repeatedly pressed the unlock on the remote while at the same time pressing and releasing the fuel flap. It worked. He explained that the flap lock can fail in a number of ways. In my case it just got stuck and the press-release was sufficient to solve the problem....


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