Question: I either lost my keys with my with my remote on it or they were stolen, can I somehow erase the one I lost and still use the spare one I have?
Answer: Yes! All you need to do is find out how your specific system's remotes program. If the system you have is an aftermarket system (not installed at the factory) you will be able to do this yourself, but you'll need to know at least the brand name of the system that's installed in your vehicle to find out this information. For example, if you have a Code Alarm brand system just Google "Code Alarm replacement remotes" and call the company that provides replacement remotes (or call us) and ask what the procedure is for programming your specific remote. Then, after you have this information, program the one remote you have 4X in a row. This will erase all the remotes that were lost or stolen. If you have 2 remotes, program each remote 2X.
Now if you have factory remotes you may have to go to either a locksmith or Dealership to have this done. It depends. You'll have to find out if your specific year, make & model of vehicle's remotes can be programmed simply with performing a procedure like Aftermarket system's or if it requires programming through the vehicle's OBDII diagnostic connector. Again, for example, just Google "2014 Ford Explorer factory remote programming". There are many locksmiths that have websites that provide this information for free right on their site (or call us!).