No gas

hello my car pejo 206 1.6xt model gas while my car is piling up but it passes when the clutch gases. Continuously doing the same I changed the ignition system, the spark plug or the map sensor I changed all of them. In the error code, P1225 is written, this is exactly what it means, which part can you answer.

 I think the fuel temperature sensor 1 circuit is shorted to ground 

might be talking about the oxygen upper sensor