Hello
I bought a 2006 Honda Accord in January which came with what I suspect is an ECM/PCM fault – the key has to be turned between stops 1 and 2 many times before the green key light will stop flashing and the VSA light disappears. At this point the engine and coil light come on, go off and everything works fine.
If you don’t do this with the key, the car will crank fine but is immobilised, hence the flashing green key, I am guessing because the ECU does not reset/communicate correctly with the other components. There is a parasitic current draw because if you charge the battery