Trouble Codes After Stage Reflash It is possible to get a “false†trouble code, such as PO603, after reflashing a Stage calibration into a Delphi ECM (2001 and later Softail, 2002 Touring). If you encounter this situation: Turn ignition OFF – this will move the code to “historicâ€. Turn ignition ON and clear the code. Turn ignition OFF for 10 seconds and the “false†code will be gone.