Common
faults
Classication
Possible causes Troubleshooting method
Excessive refueling,
shakin g and
ameout
EFI
Fuel injector failure or blockage Check and replace the fuel injector
Impurities in the fuel lter Replace fuel lter
Step loss of step motor
Re initialize to reset the stepping motor, so as to eliminate the
step loss of the stepping motor
Throttle position sensor fault Check or replace the throttle position sensor
Insucient oil pump pressure Check or replace the oil pump
Intake and
exhaust
The lter screen of air lter is too dirty
or the exhaust is blocked
Clean the lter screen of the air lter and replace the muer
High fuel
consumption
EFI
Oxygen sensor failure Check and replace the oxygen sensor
Intake air temperature / pressure sensor
failure
Check or replace the intake air temperature sensor
Cylinder head temperature sensor failure Check or replace the cylinder head temperature sensor
Engine
Poor ignition of spark plug
Check the connector or replace the spark plug or spark plug cap
Poor contact between spark plug cap
and spark plug
Cylinder pulling or leakage on the valve
sealing
Check and replace the engine
Intake and
exhaust
The lter screen of air lter is too dirty
or the exhaust is blocked
Clean the lter screen of the air lter and replace the muer
Other
Bad driving habits, improper tire pressure , serious wear of transmission chain or belt, abnormal braking
system