It is where the car "throws down the gauntlet" to challenge the owner to a game of Russian roulette
Normally this happens, where some "green plum" has been into the fuel tank to rectify a fuel pump issue, and bends or otherwise knacks the float arm.
So bearing that in mind, check the drivers side module first, then the passenger side if that doesn't work.
There are two separate float level sensors, and the IPK take the average of the two readings to arrive at what is displayed on the gauge
Have fun
Brian
