~ check engine ~

[J_MAK]

i just installed a DC full race header on my 06 Si which eliminate the catalytic converter...now 3-4 days later check engine light up..my question is what could be the caused? could it be my secondary O2 sensor since the catalytic converter is gone?? or could it be something else?? any ideas guys??

 

[RedLine42]

Id take it down to autozone or whatever and have them read the cel. Its probably the sensor, Its reading the high amount of bad gasses. If its that Just get a o2 simulator.

 

[JackBauer]

Make a hole and put the Si's sensor back in. You may end up running into MAF sensor problems if you run it too long without the O2 sensor(s).