so i have an 04 max. on my way home from the cvs i noticed the service engine soon light was on. when i put the car in gear the gas peddle didnt rev the engine no mater how much i pushed it down. so i put in park shut off the car turned it back on and the car was back to normal jus the light was still on, till this day it still is, i got the code P2135 so what can i do to fix this problem. only mod i have is a k&n cold air intake

 

thats a throttle body code, you can try cleaning it then clearing the code. if it comes back, you might need a new TB

did you oil the K&N recently? if any oil builds up around the TB or MAF the oil can cause wonky problems

 

Just remember to read the DIY on throttle body cleaning on your drive by wire system. you can mess the sensor up if you aren't careful, or so I hear.