It really depends on the code that it's setting as to how to correct it. If it's a lean or rich fuel control code then there is probably something wrong with the fuel control. If it's a slow response problem then it could be related to the exhaust mods. IIRC that thing has a singe sensor with one wire which means it is a non-heated O2. If the exhaust mods are what's causing the problem and the sensor is cooling off at low loads/engine speed then you might try wiring in a heated O2.