Maintenance Manual for J2 Sedan
Electronic Control System
of Engine
212
Fault code: P0130 “the signal of upstream oxygen sensor is unreasonable”
S/N
Step
Check result
Subsequent step
1
Connect the diagnosis device and adapter, and turn the ignition switch
to ON position.
Next step
Yes
Diagnosis help
2
Start the engine and run the engine idly till the coolant temperature
reaches to the normal value. Observe the change of the value of
“Oxygen sensor voltage” on the diagnosis meter, and at this moment,
the displayed value shall change fast between 100mV and 900mV.
No
Next step
Yes
Repair or replace
the harness
3
Check if the circuits connecting Pins 39# and 45# of ECU
respectively to Pin 3# (relative to gray connecting wire of oxygen
sensor) and Pin 4# (relative to black connecting wire of oxygen
sensor) of sensor connector are short to ground.
No
Next step
Yes
Make check and
repair according
to diagnosis
results.
4
A. Check if the intake system has serious leakage.
B. Check if the fuel injector is blocked.
C. Check if the spark plug clearance is too big.
D. Check if the resistance of live wire branch is too high.
E. Check if the intake valve guide is worn.
Etc.
No
Diagnosis help
Fault code: P0131 “the circuit voltage of upstream oxygen sensor signal is too low”
S/N
Step
Check result
Subsequent step
1
Connect the diagnosis device and adapter, and turn the ignition switch
to ON position.
Next step
Yes
Diagnosis help
2
Start the engine and run the engine idly till the coolant temperature
reaches to the normal value. Observe the change of the value of
“Oxygen sensor voltage” on the diagnosis meter, and at this moment,
the displayed value shall change fast between 100mV and 900mV.
No
Next step
Yes
Repair or replace
the harness
3
Check if the circuits connecting Pins 39# and 45# of ECU
respectively to Pin 3# (relative to gray connecting wire of oxygen
sensor) and Pin 4# (relative to black connecting wire of oxygen
sensor) of sensor connector are short to power source.
No
Diagnosis help
Fault code: P0132 “the circuit voltage of upstream oxygen sensor signal is too high”
S/N
Step
Check result
Subsequent step
1
Connect the diagnosis device and adapter, and turn the ignition switch
to ON position.
Next step
Yes
Diagnosis help
2
Start the engine and run the engine idly till the coolant temperature
reaches to the normal value. Observe the change of the value of
“Oxygen sensor voltage” on the diagnosis meter, and at this moment,
the displayed value shall change fast between 100mV and 900mV.
No
Next step
Yes
Repair or replace
the harness
3
Check if the circuits connecting Pins 39# and 45# of ECU
respectively to Pin 3# (relative to gray connecting wire of oxygen
sensor) and Pin 4# (relative to black connecting wire of oxygen
sensor) of sensor connector are short to power source.
No
Diagnosis help
