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Your fuel gauge sending unit is inside your gas tank.
It is likely defective, and may need replacement.
Some Mazda dealers may have an electronic tester that will measure it's effectiveness.
Having had several cars with this same problem, I have always opted to live with it, but very likely a new sending unit is in order.
God bless your efforts.
There is a trick to reset all of the gauges in your PT Cruiser. There are three simple steps to reset them.
Step 1. Hold down the "Trip" button
Step 2. While holding onto the Trip button, turn the key and start the car. (This should make all the gauges and numbers reset and run a test)
Step 3. Release the trip button and the fuel gauge should work properly.
If not, there might be a problem with your fuel pump.
to check it . wire at the fuel tank gauge unplug it the black and purple wire for gauge. put a variable resistor , fuel gauge is rated 0 to 90 ohms. So variate the resistor and see if fuel gauge move. if it does fuel sender have problem or inside tank wire
87 will be fine. But I always run 89 seems to be a little better burning gas. But with the price of gas these days I'd run 87. Just run some fuel injector cleaner once in a while.
You need to replace your fuel level sensor. But previous post is right, if you're comfortable running based on fuel remaining and kilometers, don't sweat it. If you're keen, the fuel level sensor can be accessed from the trunk (under the liner on the passenger side, beneath the silver panel).
pump may be operating with broken impellers. Recommend you replace pump and sending unit--they may come together anyway. Any more questions, please let us know.
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