Temperature regulation sensors - Import export

The fuel temperature sensor is one factor that tells the ECU how to adjust the amount of fuel injected. When the fuel is warm, it's less dense and burns more readily so the ecu injects more fuel to get the same mass of fuel and retards the timing. When the fuel is cold, it's more dense so the ecu injects less fuel and advances the timing. Hot fuel has the same effect as higher cetane fuel at a lower temperature because it burns more readily. Timing and injection quantity is also based on many other factors, fuel temperature is just one of them.