P1582 Flight Recorder data is stored if any of the following occur: 1. Inertia Switch is activated 2.Throttle 'Limp Home' mode 3. Engine starts and stutters 4. Engine fails to start 5. Engine stalls If any of these have occured, the stored code is showing that relevant data is stored. Dealer level diagnostics is required to interrogate this data. If non of them have occured, check: 1.Inertia Switch to ECM circuit for a short circuit to B+ voltage 2.Inertia Switch failure If you clear the code and it doesn't return, then a temporary out-of-range signal has been the most likely cause. Graham