just had my Scorpion RS192 decated exhaust system fitted but seem to have a problem! The engine management light has come on and when I accelerate it goes 'limp' and will not allow me to take the revs any higher. I have had the code read and it says "Back 1, Sensor 1, Heater circuit fault" the only other thing is I have had a lambda sleeve fitted but I have drilled a hole directly into the middle like it explained to trick the sensor any ideas? Do I possibly need to let it settle? Or is my sensor before the cat fubbard? Cheers