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11

There are two possible explanations: If the fuel cap does not form a good enough seal, the fuel injection system may experience problems with drawing fuel from the tank. On newer cars many of them have a fuel cap sensor to detect if the cap is not screwed in. This is related to emissions, although i am uncertain how. I know when I get my yearly emissions ...


8

It might cause issues with the evaporative emissions controls as the tank is currently permanently vented to the atmosphere and that can trigger a check engine light. In general it shouldn't be affecting the fuel mileage, though. The other concern is that you'll probably end up clogging the various fuel filters sooner because the lack of fuel cap means all ...


7

The EPA regulations require that the fuel tank is a sealed system so that no vapors escape. There is an entire system (Evaporative Purge) dedicated to that task. EPA regulations also require that the ECM (Engine Control Module) check they system for leak. When the right conditions are met IE fuel level between 1/3 and 1/2 tank, outside temp 50 - 90 etc. the ...


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.


2

In the UK, most petrol (gas) stations sell temporary fuel caps in the appropriate colour, for very little money. They are universal fitting and usually made of plastic, so just press into the hole making a snug fit. In addition to what Tomo suggests though, I would say that it also depends on the vehicle and the fuel that you use. A big problem for ...


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, ...


1

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 ...


1

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.


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

Very on most cars and extremely on some. Extremely: on my car (2004 Subaru WRX), a loose filler cap will trigger a check engine light and the limp home mode. The engine computer will drop into a mode where it won't allow revs above a low limit and disallows all boost. Suddenly, you're in a 8:1 compression ratio car and aren't able to get out of your own ...



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