9-3 FWD (9440) L4-2.0L Turbo (B207R) (2009)
When DTCs are read out, the diagnostic instrument shows what is blocking the turn of the key.
Most functions that can make it impossible to turn the key are monitored by self-diagnostics and therefore generate DTCs if they are faulty.
Fault diagnosis is only used for faults that are not monitored by self-diagnostics.