LB7: over boost code

[butch2000]

ok I installed a cold air kit on my 2001 , and now I keep getting a overboost code ? any idea's why ?

 

[butch2000]

ok , nobody has ever had this issue ?

 

[clrussell]

Very common problem on lb7. I believe someone makes a code eliminator for it. That's if you don't use efi live.

Google is your friend on this one.

 

[clrussell]

Quick google search yielded this

http://m.ebay.com/itm/01-04-Chevy-Duramax-LB7-PPE-Over-Boost-Code-Eliminator-/270707041453

 

[bonomax]

$200 plus for PPE controller thing just for over boost code eliminator is bunch of BS. might as well get pretuned EFI Live ECM for like another $100 or $200 plus you actually get 5 different nice tunes.

 

[AKlowriderZ71]

How/why is it "normal" for a LB7 to throw an over boost DTC just by adding a CAI? Are the factory air boxes so restrictive that they actually limit incoming air to the turbo?

Sorry for the newbie question guys. Just trying to wrap my mind around this.

 

[bonomax]

i added banks intake to my 01 before i had efi or any tuning and never got any over boost code. dont know why you guys are getting this code. dont see how wastegate would be letting you even get more boost unless you add ppe valve or manual boost controller. maybe its different code. what the code number your getting?

 

[THEFERMANATOR]

01 trucks would throw the P0234 in stock form, let alone with a few mods. Heck I added a boost valve and threw one because I now can hold 20-22 pounds of boost a 2500 whereas before it wouldn't hold but 17 or so. So the ECM wanted to see 16-17, saw 22-23 and coded since it went 5 over the desired amount. Few tuning changes and I was back on my way again.