Chery QQ6 (S21) / S12LHD. Manual — part 252
11.4 Front Oxygen Sensor Failure
Failure codes: P0130, P0131, P0132, P0134, P0135
No.
Operating steps
Result
Follow up steps
1
Put the ignition switch to “ON”.
Next step
Yes
Next step
2
Pull off the connector of harness of oxygen sensor.
Check the voltage between pin 1# (+) and 2# (-)
with multimeter and detect if it is around 12V.
No
4
Yes
Replace ECU
3
Use a multimeter to check if the resistance value
between 1# and 2# pins of the oxygen sensor is
between 2Ω and 5Ω at 23
.
℃
No
Replace the sensor
Yes
Next step
4
Check if heating circuit of the oxygen sensor is
normal.
No
Check the circuit
Yes
Repair or replace
harness
5
Check if it is short circuit or break circuit between
the pin 2# of oxygen sensor and main relay 87#
pin and between the sensor connector 1# pin and
ECU 1# pin with multimeter.
No
Next step
6
Connect the oxygen sensor connector of harness
and use neutral. Start the engine and leave it at
idle speed until its coolant temperature reaches to
the normal value.
Next step
Yes
Next step
7
Pull off the oxygen sensor connector of harness.
Check the battery output voltage between pin 3#
(+) and pin 4# (-) of the sensor with multimeter
and detect if it is from 0.1 to 0.9V (after the
engine warms up).
No
Replace the sensor
Yes
Repair or replace
harness
8
Connect the adaptor between ECU and harness.
Check if it is short circuit or break circuit between
the pin 36# and pin 13# of ECU and the sensor
connector pin 3# and pin 4# respectively with
multimeter.
No
Replace ECU
9
Plug in the oxygen sensor connector of harness
and use neutral. Start the engine and leave it at
idle speed until its coolant temperature reaches to
the normal value.
Next step
Yes
Next step
10
Connect special diagnostic tester for Chery to read
part of data stream of the engine, and then observe
if part of data stream of the sensor fluctuates
between 100mv and 900mv.
No
Replace the sensor
11
Start the engine and let it run at idle speed until
coolant temperature reaches normal value.
Next step
Yes
Check other part
12
Connect special diagnostic tester for Chery to read
part of data stream of the engine, and then
carefully observe part of data stream of the sensor;
apply the accelerator pedal to bottom and then
rapidly release it, observe if the output voltage of
the oxygen sensor can reach below 100mv.
No
Replace the sensor
Note: when checking data flow of the oxygen sensor, be sure to note working position
of the engine and let the working temperature of the engine reach the normal value,
because the oxygen sensor only can start to work normally when the temperature is over
300
.
℃
11.5 Rear Oxygen Sensor Failure
Failure codes: P0136, 0137, 0138, 0036, 0037, 0038, 0054
No.
Operating steps
Result
Follow up steps
1
Put the ignition switch to “ON”.
Next step
Yes
Next step
2
Pull off the oxygen sensor connector of harness.
Check the voltage between pin 1# (+) and 2# (-)
with multimeter and detect if it is around 12V.
No
4
Yes
Replace ECU
3
Use a multimeter to check if the resistance value
between 1# and 2# pins of the oxygen sensor is
between 2Ω and 5Ω at 23
.
℃
No
Replace the sensor
Yes
Next step
4
Check if heating circuit of the oxygen sensor is
normal.
No
Check the circuit
Yes
Repair or replace
harness
5
Check if it is short circuit or break circuit between
pin 2# of oxygen sensor and main relay 87# pin
and between the sensor connector 1# pin and ECU
1# pin with multimeter.
No
Next step
6
Connect the oxygen sensor connector of harness
and use neutral. Start the engine and leave it at
idle speed until its coolant temperature reaches to
the normal value.
Next step
Next step
7
Validate if the three-way catalytic converter works
normally.
Yes
No
Replace the
three-way catalytic
converter
Yes
Next step
8
Pull out the oxygen sensor joint on harness.
Rapidly apply the accelerator pedal for several
times, and then use a multimeter to check if a
output voltage between 0.1V and 0.9V is present
between 3# (+) and 4# (-) pins of the sensor (after
the engine warms up).
No
Replace the sensor
Yes
Repair or replace
harness
9
Connect the adaptor between ECU and harness.
Check if it is short circuit or break circuit between
the pin 36# and pin 55# of ECU and the sensor
connector 3# and 4# pins respectively with
multimeter.
No
Replace ECU
10
Connect the oxygen sensor connector of harness
and use neutral. Start the engine and leave it at
idle speed until its coolant temperature reaches to
the normal value.
Next step
11
Connect special diagnostic tester for Chery to read
part of data stream of the engine, and then observe
Yes
Next step
part of data stream of the engine, and then observe
if part of data stream of the oxygen sensor is
around 100 under standard idling operation.
No
Replace the sensor
or the three-way
catalytic converter
12
Start the engine and let it run at idle speed until
coolant temperature reaches normal value.
Next step
Yes
Check other part
13
Connect special diagnostic tester for Chery to read
part of data stream of the engine, and then
carefully observe part of data stream of the sensor;
rapidly apply the accelerator pedal for several
times and observe if the output voltage of the
oxygen sensor fluctuates within a comparatively
large scope.
No
Replace the sensor
Note: The characteristics and operating principle of rear oxygen sensor is basically the
same as those of front oxygen sensor, in special conditions, they can be interchanged to
use. The only difference between them is their different installation sites (working
atmospheres), therefore, during maintenance and diagnostic processes of the vehicle,
please pay attention to some inspection techniques for front and rear oxygen sensors.
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