Does anyone know if a 2001 Altima is equipped with an electronic throttle position sensor. Does it have to be relearned/reprogram after performing a throttle body cleaning (TBC). Prior to cleaning the engine would started to bog down when I accelerated. I decided to clean the MAF, change the fuel filter/air filter and clean the TB. I did disconnected the electrical connections on the TB before removing it. I did manually open the throttle plate to clean the interior of the the throttle body. After cleaning all the components I started the car and the RPM when up to 2000. When I depress the accelerator the car would start to bog down and stop running. Not sure what happened. Prior to the car bogging down it was running great. The Service Engine Soon light was on and the code was P0402. Appreciate any help.