Fault codes can be read on the dashboard but the Yamahas FI diagnostics machine is excellent to own and includes bi directional control for diagnostics see if your lucky and there is one on
Fault codes are stored on the ECU , these will be shown via the engine fault light on the dash board
as a series of flashes of the light .
The engine management light will come on for 3 secs every time you start the bike , if the light does not come on replace the bulb at rear of clocks .
Codes are all 2 digit numbers , the first number will be read by long flashes of the light , the second
number of the code with be in short flashes of the light .
Fault code 12 - Crankshaft position sensor
Fault code 13 - Intake air pressure sensor
Fault code 14 - Intake air pressure sensor
Fault code 15 - Throttle position sensor
Fault code 16 - TPS
Fault code 19 - No signal from ignition to ecu
Fault code 22 - Intake air temp sensor
Fault code 28 - Engine temp sensor
Fault code 30 - Tip over sensor
Fault code 33 - Ignition coil
Fault code 39 - Fuel injector
Fault code 41 - Tip over sensor
Fault code 44 - Read write error ECU
Fault code 46 - Power supply error to FI system
Fault code 50 - Ecu malfunction
Fault code 51 - Diagnosis cooling fan motor relay
Fault code 52 - relay diagnostics lamp head light
Yamaha YBR 125 how to read a fault code
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