intermittent no power when key turned
I have a 2005 Roadster. In the past two weeks, I started getting a problem when starting the car. I turn the key, but nothing happens. All lights go on, radio plays fine, no warning lights. When this happens, the shift gets stuck in park. After a while the problem ceases and all seams OK. My dealer replaced the PCM (under warranty) saying it had "an internal failure" I drove out thinking all now was OK. After one day the car acted up again and was towed to dealer where it is now. ANY IDEAS AS TO MY PROBLEM???
Thanks