Hey guys I did some searching and not much turned up for this. I have a CEL code, the code is P0402 Exhaust Gas Recirculation Flow Excessive Detected...

So I'm not sure exactly what might be the problem. The car is an auto with a dezod s1 turbo kit and with ptuning s-pipe back 3" exhaust. I have had the kit and exhaust installed for about a month and a half or so with no CEL's until now. Most recently I installed the relay for the AEM FIC unit, but that shouldn't have caused the CEL, at least I wouldn't think it would. Thanks in advance everyone!

 

Do you have the rear o2 sensor pluged in? If so, do you have an antifouler on it?

 

not sure I was trying to look for it today. if i remember right there were two ports for o2 sensors. I don't believe pruning put an anti fouler in, but they may have.

 

primary is a/f, second is where you need to trick it with antifouler.