Geely Diagnosis Flow. Manual part — 35

137

No.078 Malfunction code: P0130 "signal circuit of upstream oxygen

sensor malfunction"

(Note: following diagnosis flowchart is applied when P0135 does not occur at the same time; if P0135
malfunctions exist at the same time, deal with P0135 malfunctions, and then check according to the following
flowchart.)

Serial No. Operation steps

Results

Follow-ups

1

Switch on diagnosis instrument and commutator, and place ignition switch
to “ON”.

Next

step

Yes Diagnosis

help

2

Start the engine, and make it operate at idling speed, till temperature of
cooling liquid reached normal value. Observe changes of value of “voltage
of oxygen sensor” on the diagnosis instrument, and the value shall be
changed quickly between 100mV~900mV at this time.

No Next

step

Yes

Repair or replace
harness

3

Check lines respectively between 36#, 18# of ECU and A# (opposed to
grey connecting line of oxygen sensor), B# (opposed to black connecting
line of oxygen sensor) of sensor connector are shorted to ground.

No Next

step

Yes Repair

accordingly

4

A. Check admission system is severely leaking;
B. Oil injector is blocked;
C. Spark plug is with too large clearance;
D. Resistance of sub live wire is too large;
E. Tube of intake valve is worn; etc.

No Diagnosis

help

No.079 Malfunction code: P0132 "voltage of upstream oxygen sensor

circuit too high"

(Note: following diagnosis flowchart is applied when P0135 does not occur at the same time; if P0135
malfunctions exist at the same time, deal with P0135 malfunctions, and then check according to the following
flowchart.)

Serial No. Operation steps

Results

Follow-ups

1

Switch on diagnosis instrument and commutator, and place ignition switch
to “ON”.

Next

step

Yes Diagnosis

help

2

Start the engine, and make it operate at idling speed, till temperature of
cooling liquid reached normal value. Observe changes of value of “voltage
of oxygen sensor” on the diagnosis instrument, and the value shall be
changed quickly between 100mV~900mV at this time.

No Next

step

Yes

Repair or replace

3

Check lines respectively between 36#, 18# of ECU and A# (opposed to
grey connecting line of oxygen sensor), B# (opposed to black connecting
line of oxygen sensor) of sensor connector are shorted to power source.

No Diagnosis

help

No.080 Malfunction code: P0134 "upstream oxygen sensor signal

malfunction"

(Note: following diagnosis flowchart is applied when P0135 does not occur at the same time; if P0135
malfunctions exist at the same time, deal with P0135 malfunctions, and then check according to the following
flowchart.)

138

Serial No. Operation steps

Results

Follow-ups

1

Switch on diagnosis instrument and commutator, and place ignition switch
to “ON”.

Next

step

Yes Diagnosis

help

2

Start the engine, and make it operate at idling speed, till temperature of
cooling liquid reached normal value. Observe changes of value of “voltage
of oxygen sensor” on the diagnosis instrument, and the value shall be
changed quickly between 100mV~900mV at this time.

No Next

step

Yes

Repair or replace
harness

3

Check lines respectively between 36#, 18# of ECU and A# (opposed to
grey connecting line of oxygen sensor), B# (opposed to black connecting
line of oxygen sensor) of sensor connector are opened.

No Diagnosis

help

No.081 Malfunction code: P0135 "heating circuit of upstream oxygen

sensor malfunction"

Serial No. Operation steps

Results

Follow-ups

1

Switch on diagnosis instrument and commutator, and place ignition switch
to “ON”.

Next

step

Yes Next

step

2

Take out connector of oxygen sensor of harness, and check voltage
between C# (opposed to white connecting line of oxygen sensor), D#
(opposed to white connecting line of oxygen sensor) pins of this connector
is around 12V with multimeter.

No

To step 4

Yes Next

step

3

Check resistance between C# (white), D# (white) pins of oxygen sensor is
between 2~5Ω under 20 with multimeter.

℃

No Replace

sensor

Yes Replace

fuse

4

Check 8A fuse of heating circuit of oxygen sensor is blown.

No Next

step

Yes

Repair or replace
harness

5

Check lines respectively between 1# pin of ECU, 87# pin of main relay and
C# (opposed to white connecting line of oxygen sensor), D# (opposed to
white connecting line of oxygen sensor) of sensor connector are opened, or
shorted to power source or ground.

No Diagnosis

help

No.082 Malfunction code: P0171 “self-adapting of closed-loop control

of air fuel ratio shall exceed upper part”

(Note: following diagnosis flowchart is applied when malfunction codes such as admission pressure sensor,
canister control valve, oxygen sensor do not occur at the same time; if relevant malfunction codes exist at the
same time, deal with other malfunctions, and then check according to the following flowchart.)

Serial No. Operation steps

Results

Follow-ups

139

1

Switch on diagnosis instrument and commutator, and place ignition switch
to “ON”.

Next

step

Yes Next

step

2

Start the engine, and make it operate at idling speed, till temperature of
cooling liquid reached normal value. Under full condition, observe changes
of value of “voltage of oxygen sensor” on the diagnosis instrument, and
check the value is around 100mV under some conditions for a long time.

No Diagnosis

help

Yes Next

step

3

Switch on fuel pressure gauge at oil inlet pipe of fuel system, and observe
pressure is around 350kPa under full condition.

No

Repair fuel system

Yes

Repair or replace
harness

4

Check lines respectively between 36#, 18# pins of ECU and A# (opposed to
grey connecting line of oxygen sensor), B# (opposed to black connecting
line of oxygen sensor) of sensor connector are shorted to power source.

No Next

step

Yes Repair

accordingly

5

A. Check admission system is severely leaking;
B. Oil injector is blocked;
C. Spark plug is with too large clearance;
D. Resistance of sub live wire is too large;
E. Tube of intake valve is worn; etc.

No Diagnosis

help

No.083 Malfunction code: P0172 “self-adapting of closed-loop control

of air fuel ratio shall exceed lower part”

(Note: following diagnosis flowchart is applied when malfunction codes such as admission pressure sensor,
canister control valve, oxygen sensor do not occur at the same time; if relevant malfunction codes exist at the
same time, deal with other malfunctions, and then check according to the following flowchart.)

Serial No. Operation steps

Results

Follow-ups

1

Switch on diagnosis instrument and commutator, and place ignition switch
to “ON”.

Next

step

Yes Next

step

2

Start the engine, and make it operate at idling speed, till temperature of
cooling liquid reached normal value. Under full condition, observe changes
of value of “voltage of oxygen sensor” on the diagnosis instrument, and
check the value is around 900mV under some conditions for a long time.

No Diagnosis

help

Yes Next

step

3

Switch on fuel pressure gauge at oil inlet pipe of fuel system, and observe
pressure is around 350kPa under full condition.

No

Repair fuel system

4

Check lines respectively between 36#, 18# pins of ECU and A# (opposed to
grey connecting line of oxygen sensor), B# (opposed to black connecting
line of oxygen sensor) of sensor connector are shorted to power source.

Yes

Repair or replace
harness

140

No Next

step

Yes Repair

accordingly

5

A. Oil injector is leaking;
B. Exhaust pipe is leaking;
C. Ignition timing is incorrectly; etc.

No Diagnosis

help

No.084 Malfunction code: P0201 "one-cylinder oil injector circuit

malfunction"

Serial No. Operation steps

Results

Follow-ups

1

Switch on diagnosis instrument and commutator, and place ignition switch
to “ON”.

Next

step

Yes

To step 4

2

Take out connector of one-cylinder oil injector of harness, and check
voltage between 1# pin of this harness and cathode of power source is
around 12V.

No Next

step

Yes

Repair or replace
harness

3

Check lines between 1# pin of connector of one-cylinder oil injector and
main relay are opened or shorted to ground.

No Next

step

Yes Next

step

4

Check resistance between 1# and 2# pins of one-cylinder oil injector is
between 11~13Ω under 20 with multimeter.

℃

No

Replace oil injector

Yes Diagnosis

help

5

Check voltage between 2# pin of one-cylinder oil injector connector and
cathode of power source is around 3.7V with multimeter.

No Next

step

Yes

Repair or replace
harness

6

Check lines between 2# pin of one-cylinder oil injector connector and 27#
pin of ECU are opened or shorted to power source or ground.

No Diagnosis

help

No.085 Malfunction code: P0202 "two-cylinder oil injector circuit

malfunction"

Serial No. Operation steps

Results

Follow-ups

1

Switch on diagnosis instrument and commutator, and place ignition switch
to “ON”.

Next

step

Yes

To step 4

2

Take out connector of two-cylinder oil injector of harness, and check voltage
between 1# pin of this harness and cathode of power source is around 12V.

No Next

step

Yes

Repair or replace
harness

3

Check lines between 1# pin of connector of two-cylinder oil injector and
main relay are opened or shorted to ground.

No Next

step

Yes Next

step

4

Check resistance between 1# and 2# pins of two-cylinder oil injector is
between 11~13Ω under 20 with multimeter.

℃

No

Replace oil injector