Hi guys,

I have a question for the guys who have JDM S5 and ap engineering PFC. On the factory N374 ecu there is a black box next to the ecu that is connected to a harness. When i installed my ap engineering PFC do you leave this black box unconnected or do you connect it back to the harness? I noticed that if i connect it, my exhaust temp light in the idiots lights lights and when i have it unconnected it disappears...

Thanks