So I Went to My Buddy's House, & He Has an OBD Scanner, & we plugged up my car & i got these codes. I know the P0420A is because of my clogged cat, but i just got a ZZP downpipe and ima put it in and i understand that the code will stay until i get a PCM tune. i just have no idea wtf the other 2 are. he told me something about "knocking" i need sum help.

P0332B
P0420A
P0730C

 

im not sure if i posted this thread in the right forum section.
so im just gunna bump it.

 

It's in the right section. Did you notice this sticky that is 2 posts above yours?

https://montecarloforum.com/forum/sh...ad.php?t=17144

Should let you know in more detail about your OBDII codes. Did you already install the downpipe?

 

thanks for the help man. u never let me down.
no i have not yet installed it, i got it in the mail yesterday and im waiting for my FWI to get here to do them both the same day. its taking long because of powdercoating.

 

 

Oh I was gonna say maybe it was installed wrong so the pipe was hitting something and setting off your knock sensors.

 

whats a knock sensor?

 

 

You'll find this is great reading for this DTC P0730 Incorrect Gear Ratio:
http://www.sonnax.com/tech-articles/TASC-TIP-06-04.pdf


This link explains what the code is and how to check for faults (Also pretty enlightening): DTC P0332 Knock Sensor 2 Circuit Low Input (Bank 2)

http://www.gm-trucks.com/forums/inde...howtopic=73881

 

To fix my gear ratio thing can i just get a tuned PCM?

i asked my buddy that owns CompTurbo [compturbo.com] what could possibly be wrong with my Knock Sensor and he said i should replace it. he gets a discount and says he can get it real cheap.