I have a 2003 Plus 8 with the GEMS Engine Management system including the immobilizer. Occasionally the car won't turn over even though the immobilizer is deactivated. After cycling the key two or three times the car starts normally and may continue to do so for a number of starts.
When the no start condition occurs the Check Engine Light comes on and the ECM stores a 1622 code (Repeated Wrong ECM Security Code Fault). Does anyone have any ideas on what is happening and how to prevent it? The nearest dealer is 6 hours away, so running over and having them hook it up to a Rovacom is a two day trip.
The battery is new and all connections are good.
Thanks,
Dave
