Toyota Sienna Fuel Tank Cap
Toyota Tacoma Gas Cap: Diagnosing the Causes of Failure
Your Toyota Tacoma gas cap protects your fuel from dirt and debris that can contaminate and clog your engine. It also prevents the gasoline from evaporating, so you can enjoy miles of driving. Over time, stress and corrosion can cause your gas cap to malfunction. When this happens, your vehicle may suffer from several problems. Here are some troubleshooting steps that will help you determine what causes your gas cap to break down.
Unusual gas odor
The pervasive smell of gasoline coming from your gas tank is the first symptom that indicates gas cap failure. To verify this, stand in an area not so far from your gas tank. Observe. If you smell a strong stench of gasoline, then you know that your gas cap is either missing or loose. Remove the mounting screws to take the cap out of the vehicle completely. Observe the cap for cracks and holes. If the cap is severely damaged, you must replace it immediately. It's the only way to stop your gasoline from leaking out
The Po44o code
A loose gas cap is very easy to detect with the help of an automotive scan tool. This device provides accurate data readings that point you to the exact defective component in your vehicle. If you're "Check Engine" light is on, get your scan tool and plug it to the port located under your car's dash. The check engine warning can be caused by several things, so you need to do further troubleshooting. After plugging the tool, wait for a few minutes before reading the results of the scan. If the code Po44o is flashing on the tool's screen, it's confirmed that your gas cap is not properly installed.
Poor gas mileage
If you keep on complaining about your Tacoma's extremely poor performance and low fuel mileage, you should check your gas cap immediately. Verify if he cap is still installed in your car. The cap may come off from its mounting if the retaining screws are removed. If the cap is still attached, check if it's loose or not. After that, remove the cap from the fuel port. Observe any hissing sound while you're doing it. The sound indicates that there is still enough pressure in the system. It means that the cap is tightly secured. If no sound is heard, the cap is possibly cracked, hence must be replaced.