Lifan 620. Manual — part 12

7. DTC: P0130, Upper Oxygen Sensor Signal Circuit Trouble (see Table 1-20)
(Note: If the trouble of P0135 occurs simultaneously, please remove the trouble of P0135 at first,
and then go to the following steps.)

Table 1-20

S/N Operation Test

Results

Actions

1

Connect the diagnostic instrument and adapter, and turn the

ignition switch to ON.

Next

step

Yes Diagnosis

help

2

Start the engine, and keep idle speed until the coolant reaches

3

4

1

2

Yes

Repair or replace

harness

3

Check for short to power supply between pin 36#, 18# of the

ECU and pin A# (to the grey connection line of the oxygen

sensor), B# (to the black connection line of the oxygen sensor)

of the sensor with a multimeter.

No Diagnosis

help

49

9. DTC: P0134, Upper Oxygen Sensor Signal Circuit Trouble (see Table 1-22)
(Note: If the trouble of P0135 occurs simultaneously, please remove the trouble of P0135 at first,
and then go to the following steps.)

Table 1-22

S/N Operation Test

Results

Actions

1

Connect the diagnostic instrument and adapter, and turn the

ignition switch to ON.

Next

step

Yes Diagnosis

help

2

Start the engine, and keep idle speed until the coolant reaches

3

1

2

3

4

Yes

Repair or replace

harness

5

Check for open circuit, short to power supply or ground

between the pin 1# of the ECU, pin 87# of the main relay and

the pin C# (to the white connection line of the oxygen sensor)

and the pin D# (to the white connection line of the oxygen

sensor) of the sensor with a multimeter.

No Diagnosis

help

50

11. DTC: P0171, Air Fuel Ratio Closed Loop Control Self-adaptation Upper Limit Break (see
Table (1-24)

(Note: If the DTC related to intake air pressure sensor, canister control valve, oxygen sensor is
produced, please remove these troubles at first, and then go to the following steps.)

Table 1-24

S/N Operation Test

Results

Actions

1

2

3

4

5

51

12. DTC: P0172, Air Fuel Ratio Closed Loop Control Self-adaptation Bottom Limit Break (see
Table 1-25)

(Note: If the DTC related to intake air pressure sensor, canister control valve, oxygen sensor is
produced, please remove these troubles at first, and then go to the following steps.)

Table 1-25

S/N Operation

Test

Results

Actions

1

Connect the diagnostic instrument and adapter, and turn the

2

3

4

5

52