The Fuel Sensor monitors the fuel entering through it, in order to ensure that the level of water, ethanol, and other contaminants present in the fuel, do not exceed the allowable limit. This sensor also monitors the fuel temperature and converts it into a voltage that monitors the Powertrain Control Module. The PCM uses this information to achieve both performance and fuel economy.
When the P2269 OBDII diagnostic code is stored, it means that the PCM detected that a significant percentage of water is present in the fuel system. This condition is recognized by the Fuel Sensor