Not sure what you are doing, but coding would be the correct way. However, if all you want is not to see the lights and you are not concerned with setting codes, etc. then there is another way. All you need to do is remove the cluster, dismantle enough to get to the lights and place a bit of well cut electrical tape over the lights. If you want you can cut a small piece of foam to fill up the hole but the tape alone works pretty well. I've had several cars with immobilizer delete and that is how I got rid of the light. If you search you can find instructions on how to dismantle the cluster including removing and replacing the needles.