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Use fault diagnosis tester
When the engine is running, if the fault indicator or service indicator on the handle or multifunction
tester is always on/buzzer is always on, it indicates that there is a fault in the engine. At this time,
connect the fault diagnosis tester with the corresponding detection port on the engine, and display the
running parameters and fault codes of the engine on the mobile phone through the APP. Then check
the fault code table to determine the engine fault and replace the faulty electrical components.
Service indicator Fault indicator
Fault code table
Fault type Fault item Code
Intake pressure fault
Short circuit to ground or open circuit of
intake pressure sensor line
107
Short circuit to high level of intake pressure
sensor line
108
Intake temperature
fault
Short circuit to high level of intake
temperature sensor line
112
Short circuit to ground or open circuit of
intake temperature sensor line
113
Water temperature
fault
Short circuit to ground of coolant temperature
sensor line
117
Short circuit to high level of coolant
temperature sensor
118
Throttle fault
Short circuit to ground of throttle position
sensor
122
Short circuit to high level of throttle position
sensor
123
Oxygen sensor fault
Short circuit to ground of oxygen sensor 131
Short circuit to high level of oxygen sensor 132
Oxygen sensor
heating fault
Oxygen heater fault
135
Fuel injector fault
Cylinder 1 nozzle line fault
201
Cylinder 2 nozzle line fault
202
Cylinder 3 nozzle line fault
203
Cylinder 4 nozzle line fault
204
Fuel pump fault
Oil pump relay fault
230
Crankshaft position
sensor fault
Signal interference of crankshaft position
sensor line
336
No signal of crankshaft position sensor line
337
Ignition coil fault
Cylinder 1/4 ignition coil fault
351
Cylinder 2/3 ignition coil fault
352
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