Yamaha YZ250FX 2021, Owner'S Manual

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SELF-DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLE
8-12
EAM20174
SELF-DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLE
EAM30497
SELF-DIAGNOSTIC FUNCTION TABLE (FOR FUEL INJECTION SYSTEM)
Fault code Item
12
Crankshaft position sensor: no normal signals are received from the crankshaft position sen-
sor.
13 Intake air pressure sensor: open or short circuit detected.
14 Intake air pressure sensor: hose system malfunction (clogged or detached hose).
15 Throttle position sensor: open or short circuit detected.
16 Throttle position sensor: stuck throttle position sensor is detected.
21 Coolant temperature sensor: open or short circuit detected.
22 Intake air temperature sensor: open or short circuit detected.
30 The vehicle has overturned.
33 Ignition coil: open or short circuit detected in the primary lead of the ignition coil.
39 Injector: open or short circuit detected.
41 ECU: built-in lean angle sensor malfunction.
43 Fuel system voltage: incorrect voltage supplied to the main relay and CCU.
44 EEPROM fault code number: an error is detected while reading or writing on EEPROM.
46 Vehicle system power supply: normal voltage is not supplied to the ECU.
50 ECU: faulty ECU memory.
70 Engine forcibly stops when the vehicle is left idling for a long period of time.