latley my car has been going in to limp mode when i go hard on it.
its throwing alot of codes as well.
p2135
p2122
p2128
p0300 and other variations of the same codes.

not sure what to do, any thoughts??

bump

 

morning bump

 

p2135
p2122
p2128

these codes all relate to the throtle body/pedal positioning sensors. I had those, took my car to a shop where they replaced the sensors needed. They may or may not replace the actual TB because sometimes with those codes you dont need a new TB.

the p0300 is a random/multi cylinder misfire. Few things can be done to fix this without having to spend much.

* Faulty spark plugs or wires
* Faulty coil (pack)
* Faulty oxygen sensor(s)
* Faulty fuel injector(s)
* Burned exhaust valve
* Faulty catalytic converter(s)
* Stuck/blocked EGR valve / passages
* Faulty camshaft position sensor
* Defective computer
The cause is often a lean fuel condition, which may be due to a vacuum leak in the intake manifold or unmetered air getting past the airflow sensor, or an EGR valve that is stuck open.

Good luck

 

try unhooking the battery and let sit for about 15 mins and plug back in. or could be bad tuning.

 

check out my profile and my posts regarding limp mode. like viceversa said, its caused by your engine running too lean for the pcm to handle. you hit enough bad cells and your car will go into limp mode.

i had to get my pcm replaced (under warranty by chevy) and retuned and it corrected the problem. I would recommend you clean your MAF sensor and check the connections on your throttle body position sensor as well. If all else fails, find somebody with HP tuners in your area that can tune your car.

LIMP MODE SUCKS.

 

i don't think its runing lean though cause it smells rich as hell.

 

limp mode? sounds like a personal problem bud. They make pills for that

 

P300 could also be caused by a simple fuel filter. The rest of the codes are either the throttle pedal that has failed and or the throttle body. I had to replace my pedal @ 40k miles. and @ 49k my thorttle body went out. Since I have replaced both, everything is a okay.