Firstly, is it possible for an error code to make a difference in performance? I get the usual error code because of the de-cat, lambda bank 1. When i clear it, i notice a difference in torque and the less amount of throttle i need to get anywhere.
Secondly, i have heard mentioned before a resistor you can put into the wiring of the lambda sensor so that it tricks it into not turning the engine light on every 200 miles. Is there any guide for this? I did search but it was a bit vague to say the least

Thank you in advance...