HI

I recently installed PPE headers and few days later, after some spirited driving, engine check light and traction control light popped up.

reset the ecu by removing terminals and check lights disappeared.

Popped in by the dealer and they say a C1201 error code was in history

Any idea what this could be?

 

Not sure what the error code is.

But did you install the o2 conditioner?

The tune from RR should also eliminate any check engine code from the install of the headers.

 

I have the tune from RR, but i also installed the conditioners

 

There shouldn't be a need for both. Maybe that's the issue?

 

^Agreed. You do one or the other not both. Since you have the time get rid of the conditioner. Whoever told you that you needed both is wrong.

 

This is serious. ALLDATA DIY says to replace ECU.
Start with removing the O2 sim. make sure there are no shorts, etc.