I don’t think it’s a key problem, as both keys work fine when whatever is intermittent, is working??........I’ll perhaps look at getting a mobile key guy, as they should be able to at least test the system.......It’s certainly a strange problem.......I don’t have an ignition barrel, as the key plugs into the dash......perhaps the key receptical has a loose connection?.....it’s only a small ribbon cable that runs between that, and the CAS,