Nissan Qashqai J11. Manual - part 553

EC9-368

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

P2243 A/F SENSOR

P2243 A/F SENSOR

DTC Logic

INFOID:0000000010309390

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DIAGNOSIS PROCEDURE

NOTE:
DTC P2243 can not duplicate. 

>> Proceed to 

EC9-368, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000010309391

1.

CHECK ECM HARNESS CONNECTOR CONNECTIONS

1.

Turn ignition switch OFF.

2.

Check ECM harness connector connection.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace error-detected parts.

2.

CHECK AIR FUEL RATIO (A/F) SENSOR HARNESS CONNECTOR CONNECTIONS

Check A/F sensor harness connector connection.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace error-detected parts.

3.

CHECK A/F SENSOR CIRCUIT FOR OPEN AND SHORT

Check A/F sensor circuit for open and short.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace error-detected parts.

4.

CHECK INTERMITTENT INCIDENT

Perform 

GI-41, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> GO TO 5.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P2243

PROPOR RICH SEN CIRC
(O2 sensor reference volt-
age circuit/open bank 1 sen-
sor 1)
• CO: OPEN CIRCUIT

ECM detects air fuel ratio (A/F) sensor circuit is 
open circuit.

• Harness or connectors

(A/F sensor circuit is open.)

• A/F sensor 

+

-

Continuity

ECM

A/F sensor

Connector

Terminal

Connector

Terminal

F82

89

F75

3

Existed

F83

115

6

116

2

119

1

P2243 A/F SENSOR

EC9-369

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

C

D

E

F

G

H

I

J

K

L

M

A

EC9

N

P

O

NO

>> Repair or replace error-detected parts.

5.

REPLACE A/F SENSOR

Replace A/F sensor.

CAUTION:

• Discard any A/F sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a

hard surface such as a concrete floor; use a new one.

• Before installing new A/F sensor, clean exhaust system threads using Heated Oxygen Sensor

Thread Cleaner tool and approved anti-seize lubricant.

>> INSPECTION END

EC9-370

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

P2244 A/F SENSOR

P2244 A/F SENSOR

DTC Logic

INFOID:0000000010309392

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 1 minute before conducting the next test.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Start engine and let it idle for at least 2 seconds.

2.

Check DTC.

Is DTC detected?

YES

>> Proceed to 

EC9-370, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010508255

1.

CHECK ECM HARNESS CONNECTOR CONNECTIONS

1.

Turn ignition switch OFF.

2.

Check ECM harness connector connection.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace error-detected parts.

2.

CHECK AIR FUEL RATIO (A/F) SENSOR HARNESS CONNECTOR CONNECTIONS

Check A/F sensor harness connector connection.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace error-detected parts.

3.

CHECK A/F SENSOR CIRCUIT FOR OPEN AND SHORT

Check A/F sensor circuit for open and short.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P2244

PROPOR RICH SEN CIRC
(O2 sensor reference volt-
age performance bank 1 
sensor 1)
• CC.0: SHORT CIRCUIT 

TO EARTH

• CC.1: SHORT-CIRCUIT 

TO +12V

• ECM detects air fuel ratio (A/F) sensor circuit is 

short circuit to ground.

• ECM detects air fuel ratio (A/F) sensor circuit is 

short circuit to battery.

• Harness or connectors

(A/F sensor circuit is shorted.)

• A/F sensor 

P2244 A/F SENSOR

EC9-371

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

C

D

E

F

G

H

I

J

K

L

M

A

EC9

N

P

O

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace error-detected parts.

4.

CHECK INTERMITTENT INCIDENT

Perform 

GI-41, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace error-detected parts.

5.

REPLACE A/F SENSOR

Replace A/F sensor.

CAUTION:

• Discard any A/F sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a

hard surface such as a concrete floor; use a new one.

• Before installing new A/F sensor, clean exhaust system threads using Heated Oxygen Sensor

Thread Cleaner tool and approved anti-seize lubricant.

>> INSPECTION END

+

-

Continuity

ECM

A/F sensor

Connector

Terminal

Connector

Terminal

F82

89

F75

3

Existed

F83

115

6

116

2

119

1