capt_paul

I have a 2005 C230 with a M271 engine with Kleeman header installed.

I pulled the following codes with my new scanner:
P0237 Turbo/Super Boost Sensor A Circut Low Input
P0420 Catalyst Efficiency Below Threshold (Bank1)

I also retrieved the following engine info:
Fuel Sys1 occl, using H025
Fuel Sys2 occl, using H025

Coolant 194
ST FTRM1 -3.1%
LT TRRM1 1.5%
MAP 9.7 in/Hg
RPM 753
Ign Adv 4.5 ~ 5.0
IAT 145
MAF .250 lb/min
ABSLT TPS 1.9%

I just replaced both O2 sensors just a few weeks ago to try to rid the P0420code.

Any info or suggesting troubleshooting/fixes are appreciated!

C43AMG

Check codes here : http://www.marcusfitzhugh.com/CLK/DIY/obdIIcodes.html

capt_paul

If you actually read my post before responding, you would see that I know what the code is. My question is to fixing the problem, not what the code means....