05 900 rmk flash codes

1 Blink - TPS below .7V or above 4.39
2Blink - Water temp sensor below .1V or above 4.8
3Blink - Intake air temp below .19V or above 4.9
4Blink - Barometric Sensor below 1.25V or above 3.23
5Blink - Exhaust temp below .06V or above 4.9 for more than 2 sec
6Blink - DET sensor above 6000RPM below 1.23V or above 4.3 for more than 2 seconds
7Blink - Not in use
8Blink - EV solenoid open circuit this is detected in the exhaust valve solenoid control

5 blink can also mean that your service interval has been reached. Changed via mode selection, then holding down the set for 7 seconds until flashes. Then up until set to what you want.