I have avalon 2006 its gas pedal stops working sometimes but after few seconds or mintues it starts working again

You need an OBDII scan. Otherwise way too much guessing. On the EPC, or Electronic Power Control. The gas pedal has a sending unit and the throttle body a servo motor. Doesn't matter if your CEL is lit or not. We really need a DTC to make anything close to an accurate diagnosis. Otherwise you might end up buying electrical parts that are not the problem and can not be returned.

But are you the original owner? There is a recall for this if you didn't know. THE ACCELERATOR PEDAL MAY BECOME HARD TO DEPRESS, SLOW TO RETURN TO IDLE, OR, IN THE WORST CASE, MECHANICALLY STUCK IN A PARTIALLY DEPRESSED POSITION, INCREASING THE RISK OF A CRASH. Recall Number: 10V017000 Recall Date: 01/21/2010

Recall Number: 09V388000 Recall Date: 10/05/2009 Component: VEHICLE SPEED CONTROL:ACCELERATOR PEDAL

If you are not the original owner, have the VIN ready and call 1.800.331.4331 to find out if your car has been repaired under the recall

Sir i have diagnosed it through computer but it only shows pedal sensor problem i have also cleared DTC the car shows no fault but when we go on ride aagain the gas pedal stops i have changed gas pedal thrice