Yes, since the key is intermittently not being recognised by the immobilizer, reprogramming the keys should be the first thing to do as both sets of keys have the same problem.
Prior to reprogeaming the keys, recheck the wiring and power supply to the immobiulizer ans security system. Any disruption can cause the problem as well. One thing that you need to look at would be the door locking system. If the keys do not work on all dors, you definitely have a fault with the power supply or security system. If it is only specific doors, then the problem would be the door switch.
Thank you for the offer of a donation but sorry to say I am not able to explain it to you as the system upgrade to our site is extensive and I seem to have lost track of quite a lot of things. Anyway I have contacted our admin and someone else would be answer to you shortly.
Keep me updated of how it goes.
Wednesday, August 10th, 2011 AT 7:57 PM