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C230 kompressor - check engine light issue

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Old Mar 23, 2012 | 10:30 PM
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2004 C230K Sedan
C230 kompressor - check engine light issue

Hello all,

I am new to Benzworld and this is my first post.

I have a 2004 C230 Kompressor with a Kleeman header/down pipe and sport catalytic converter along with the boost kit. I happened to purchase the vehicle with the upgrades already installed. I knew the check engine light was on when I purchased it. I live in Cali so of course I had to get it smogged. I ran the codes and it came up with a PO420 - CAT Efficiency Below Threshold. So I erased the codes and was able to smog it. The light came on not too long after I erased the code. Im assuming the sport cat is not sufficient for the vehicle as far as CAT Efficiency goes. Is there anything I can do as far as having another aftermarket converter installed that will satisfy the ECU and not turn on my check engine light?

Any solutions or suggestions will greatly be appreciated. Thanks
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