doesnt break 2k rpms when engine cold!!??

[Unrivaled7]

ok, when i start my car, which is a 02 sentra ser, my pedal will be all the way to the floor, however it doesnt go passed 2k rpms, but as it starts warming up itll get up to 3k. once it has ran for about 5 min i have to turn off the car and start it again and pray it works normal again otherwise i have to wait longer for it to warm up. my engine light is on, and something about my pedal position sensor is coming up. i dont want to jump to conclusions based off the code cause for some reason it is also saying i have misfires in multiple cylinders, which im not. someone please help!!

[VMPhil]

If the sensors are wrong then perhaps it is time to replace the sensors. The car will only run as good as the sensors tell it can run in some cases. especially if its a Maf issue.

[boost_boy]

Pull the codes from the computer via a scanner tool or find someone with a scanner and diagnose your issue.

[SER Wes]

I could be in limp mode... I will see if i can find a how-to on it

[PapaSmurf2k3]

Yeah tell us which code it is exactly.

[Unrivaled7]

these are the codes that are popping up.

P1122- Electric throttle control function
probably cause- stuck or sticking throttle plate
-poor electrical connection
-failed throttle control actuator

P0221- TPS(throttle position sensor)/APP (accel. pedal position) performance condition/except mitsubishi- fuel pump relay
explanation- powertrain control module monitors the TPS/APP sensors for errors.
probable cause- TPS/aPP sensor shorted or open
-check connector and wiring to sensor

last but not least P0300-random cylinder misfire detected
probable cause- ignition system fault
-fuel system fault
-large vacuum leak
-MAF sensor fault
-AF/Ho2s (air fuel/heated oxygen sensor) sensor fault.

now im not too good with cars and i have no idea where to begin with all of this. however i dont get why misfire is detected because my car is running perfectly fine besides the extra fuel igniting in my exhaust because its running rich. which i am in the process of fixing as well. help much appreciated!

[PapaSmurf2k3]

Hmm... I would probably start by taking off the intake tube, and having someone press the throttle (both moderately and WOT) while you look at the throttle plate (key in the ON position, but car not running). If it moves as expected, replace the TPS... if its chunky/sticky, try cleaning it all off and/or replacing the throttle motor.