shaking and shaking

I have a 2005 model peugeot 206 xt automatic transmission vehicle.When the vehicle is driving on the road, the malfunction lamp turns on and starts to vibrate.Sometimes it trembles without stopping.When there is a tremor, the uphill traction decreases.

Is the car lpg li?

no gasoline.

The vehicle is most likely cutting the ignition, look for the problem with the spark plugs in the injectors.