Specifications

13 Troubleshooting
Trouble Code：P0132 Oxygen Sensor Circuit Voltage High
Explanation： When engine starts, ECU check the Oxygen Sensor Circuit Voltage; When voltage is
continuously higher than 1.5 Volt, system decides Oxygen Sensor Circuit Voltage is short to power.
Note
Possible Troubles are as below
1）Short Circuit between Signal Circuit connect to
ECU Pin and Oxygen Sensor Oxygen Sensor Pin
1.
2）Short Circuit between Signal Circuit connect to
ECU Pin and other power circuit.
Note
Inspect as below
1 ） Check resistance between Signal Circuit
connect to ECU Pin and Oxygen Sensor Oxygen
Sensor Pin 1
2）Check resistance of Signal Circuit connect to
ECU Pin
Trouble Code：P0133 Oxygen Sensor Aging
Explanation: Normally Air Fuel Ratio of Fuel and Air is shifting between Dense and Dilute; accordingly
Oxygen Sensor signal variate among different values. When Oxygen Sensor is aging, it goes less
sensitive to Fuel-Air-Mixture, which makes signals variate lower. ECU makes average cycle calculations
to Signal Variation; when it finds cycling slower as set, it decides Oxygen Sensor Aging.
Note
Possible Troubles are as below
1）Oxygen Sensor Aging, need replacement.
Trouble Code：P0134 Oxygen Sensor Signal Failure
Explanation：W hen engine starts, ECU check the Oxygen Sensor C ircuit Voltage; W hen ECU finds
voltage stays between 0.4-0.6 volt, it decides Oxygen Sensor Signal Circuit Short.
Note
Possible Troubles are as below
1 ） Short Circuit between Oxygen Sensor
connected to ECU Pin.
2 ） Bad connection of Oxygen Sensor
Connectors.(Socket Oxidized)
Note
Inspect as below
1）Check resistance between ECU connector
and Oxygen Sensor 4.
Trouble Code： P0170 Self Studying found Closing Loop control Air Fuel Ratio irrational when
making End of Line Testing.
Trouble Code：P0171 Self Studying found Closing Loop control Air Fuel Ratio too dulate when
making End of Line Testing.
Trouble Code：P0172 Self Studying found Closing Loop control Air Fuel Ratio too dense when
making End of Line Testing.
(Note: This Inspection Process is only suitable when Air Inlet Pressure Sensor, Canister Control Valve
and Oxygen Sensor and so on has not shown with Trouble Code; If there is any other Trouble Code,
solve other Troubles first and then inspect Fuel Route correct or not)
Trouble Code：P0201 Cylinder Injector Control Circuit Open
Note
Possible Troubles are as below
1） Injector Coil Open Circuit
2） Injector C onnector Socket to ECU Pin bad
connection
3） Injector Connector Socket to Main Relay bad
connection
Note
Inspect as below
1） Check resistance of Injector
2)Check cable is connected or not