Ok, i got a 95 civic VX with a B18C1 in it. I have been running a stock P72 ECU for about a week with no problems. I reclently got a skunk2 manifold and got a P28 and had it chipped. I installed the P28 and now my car has a CEL. Code 67. Any ideas what is wrong?

 

67 Catalyst low efficiency. (same as P0420)
hope this helps

 

so how do i correct this? is it in the ECU because it was not throwing any codes with the P72. install the p28, then code 67 pops up. ... hmmm..

 

is the P28 chipped? if so what program? also i have seen alot of bad burns on chips lately