2015 Used Automatic Gasoline mileage: 225 KM Peace, mercy, and blessings of God be upon you. Whoever has faced this problem and found a solution, please inform us. I have an Elantra model 2015, large engine 2000 cc. Sometimes when I accelerate from a standstill, the car has no power at all, as if I'm not pressing the accelerator, and suddenly it jumps and accelerates. And sometimes when I'm stopped at a traffic light, it jumps on its own without me pressing the accelerator. When I disconnect the exhaust sensor, the problem disappears, but the fuel consumption remains. I fill it with a full tank of gasoline, and it only takes me 250 kilometers. I ran a computer diagnostic, and they told me it's from the exhaust sensor. Note that I replaced the exhaust sensor, spark plugs, fuel filter, and engine sensor, and cleaned the entire fuel system a few months before this problem appeared. Although there were no problems before I changed and cleaned the fuel system (I only did it as part of regular maintenance), this problem appeared a few months later. Whoever has a solution or knows a workshop that cleans the entire system thoroughly and does clean work, please inform us.