2016 NISSAN NOTE sensor

P014C, P014D, P015A, P015B, A/F SENSOR 1EC-245
< DTC/CIRCUIT DIAGNOSIS > [HR16DE]
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Diagnosis ProcedureINFOID:0000000012431454
1.CHECK GROUND CONNECTION
1. Turn ignition switch OFF.
2. Check ground connection E15. Refer to GI-42, "
Intermittent Incident".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace ground connection.
2.RETIGHTEN A/F SENSOR 1
Loosen and retighten the A/F sensor 1. Refer to EM-31, "
Exploded View".
>> GO TO 3.
3.CHECK EXHAUST GAS LEAK
1. Start engine and run it at idle.
2. Listen for an exhaust gas leak before three way catalyst (manifold).
Is exhaust gas leak detected?
YES >> Repair or replace.
NO >> GO TO 4.
4.CHECK FOR INTAKE AIR LEAK
Listen for an intake air leak after the mass air flow sensor.
Is intake air leak detected?
YES >> Repair or replace.
NO >> GO TO 5.
5.CLEAR THE MIXTURE RATIO SELF-LEARNING VALUE
1. Clear the mixture ratio self-learning value. Refer to EC-132, "
Description".
2. Run engine for at least 10 minutes at idle speed.
Is the 1st trip DTC P0171 or P172 detected? Is it difficult to start engine?
YES >> Perform trouble diagnosis for DTC P0171 or P0172. Refer to EC-248, "DTC Logic" or EC-252,
"DTC Logic".
NO >> GO TO 6.
6.CHECK AIR FUEL RATIO (A/F) SENSOR 1 POWER SUPPLY CIRCUIT
1. Disconnect A/F sensor 1 harness connector.
2. Turn ignition switch ON.
3. Check the voltage between A/F sensor 1 harness connector and ground.
Is the inspection result normal?
YES >> GO TO 8.
PBIB1216E
A/F sensor 1 Ground Voltage
Connector Terminal
F12 4Ground Battery voltage
Revision: August 2015 2016 Versa Note

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EC-246
< DTC/CIRCUIT DIAGNOSIS >[HR16DE]
P014C, P014D, P015A,
P015B, A/F SENSOR 1
NO >> GO TO 7.
7.DETECT MALFUNCTIONING PART
Check the following.
• IPDM E/R harness connector F42
• Harness for open or short between A/F sensor 1 and fuse
>> Repair or replace harness or connectors.
8.CHECK A/F SENSOR 1 INPUT SIGN AL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between A/F sensor 1 harness connector and ECM harness connector.
4. Check the continuity between A/F sensor 1 harness connector and ground, or ECM harness connector
and ground.
5. Also check harness for short to power.
Is the inspection result normal?
YES >> GO TO 9.
NO >> Repair open circuit or short to ground or short to power in harness or connectors.
9.CHECK AIR FUEL RATIO (A/F) SENSOR 1 HEATER
Refer to EC-175, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 10.
NO >> GO TO 13.
10.CHECK MASS AIR FLOW SENSOR
Refer to EC-187, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 11.
NO >> Replace mass air flow sensor. Refer to EM-26, "
Removal and Installation".
11 .CHECK PCV VALVE
Refer to EC-476, "
Inspection".
Is the inspection result normal?
YES >> GO TO 12.
NO >> Repair or replace PCV valve. Refer to EM-48, "
Exploded View".
A/F sensor 1ECM
Continuity
Connector Terminal Connector Terminal
F12 1
F11 49
Existed
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A/F sensor 1 Ground Continuity
Connector Terminal
F12 1
Ground Not existed
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ECM Ground Continuity
Connector Terminal
F11 49
Ground Not existed
53
Revision: August 2015 2016 Versa Note

cardiagn.com

P014C, P014D, P015A, P015B, A/F SENSOR 1EC-247
< DTC/CIRCUIT DIAGNOSIS > [HR16DE]
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12.CHECK INTERMITTENT INCIDENT
Perform GI-42, "
Intermittent Incident".
Is the inspection result normal?
YES >> GO TO 13.
NO >> Repair or replace.
13.REPLACE AIR FUEL RATIO (A/F) SENSOR 1
Replace air fuel ratio (A/F) sensor 1. Refer to EM-31, "
Exploded View".
CAUTION:
• Discard any sensor which has been dropped from a he ight 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 sensor, clean exhaust syst em threads using Oxygen Sensor Thread Cleaner
[commercial service tool (J-43897-18 or J43897-12)] and approved Anti-seize Lubricant (commercial
service tool).
>> INSPECTION END
Revision: August 2015 2016 Versa Note

cardiagn.com

EC-248
< DTC/CIRCUIT DIAGNOSIS >[HR16DE]
P0171 FUEL INJECTION SYSTEM FUNCTION
P0171 FUEL INJECTIO
N SYSTEM FUNCTION
DTC LogicINFOID:0000000012431455
DTC DETECTION LOGIC
With the Air/Fuel Mixture Ratio Self-Learning Control, the actual mixture ratio can be brought closely to the
theoretical mixture ratio based on the mixture ratio f eedback signal from the A/F sensor 1. The ECM calcu-
lates the necessary compensation to correct the of fset between the actual and the theoretical ratios.
In case the amount of the compensation value is extremely large (The actual mixture ratio is too lean.), the
ECM judges the condition as the fuel injection system malfunction and lights up the MIL (2 trip detection logic).
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure
before conducting the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE-I
1. Clear the mixture ratio self-learning value. Refer to EC-132, "
Description".
2. Start engine.
Is it difficult to start engine?
YES >> GO TO 3.
NO >> GO TO 4.
3.RESTART ENGINE
If it is difficult to start engine, the f uel injection system has a malfunction, too.
Crank engine while depressing accelerator pedal.
NOTE:
When depressing accelerator pedal three-fourths (3/4) or more, the control system may not start the engine.
Do not depress accelerator pedal too much.
Does engine start?
YES >> Go to EC-249, "Diagnosis Procedure".
NO >> Check exhaust and intake air leak visually.
4.PERFORM DTC CONFIRMATION PROCEDURE-II
1. Start engine and let it idle for at least 5 minutes.
2. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Go to EC-249, "Diagnosis Procedure".
Sensor Input signal to ECM ECM functionActuator
A/F sensor 1 Density of oxygen in exhaust gas
(Mixture ratio feedback signal) Fuel injection control Fuel injector
DTC No. Trouble diagnosis content
DTC detecting conditionPossible cause
P0171 Fuel injection system too
lean • Fuel injection system does not operate properly.
• The amount of mixture ratio compensation is
too large. (The mixture ratio is too lean.) • Intake air leaks
• A/F sensor 1
• Fuel injector
• Exhaust gas leaks
• Incorrect fuel pressure
• Lack of fuel
• Mass air flow sensor
• Incorrect PCV hose connection
Revision: August 2015
2016 Versa Note

cardiagn.com

P0171 FUEL INJECTION SYSTEM FUNCTIONEC-249
< DTC/CIRCUIT DIAGNOSIS > [HR16DE]
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NO >> GO TO 5.
5.PERFORM DTC CONFIRMATION PROCEDURE-III
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Start engine.
3. Maintain the following conditions for at least 10 consecutive minutes. Hold the accelerator pedal as steady as possible.
CAUTION:
Always drive vehicle at a safe speed.
4. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Go to EC-249, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000012431456
1.CHECK EXHAUST GAS LEAK
1. Start engine and run it at idle.
2. Listen for an exhaust gas leak before three way catalyst (manifold).
Is exhaust gas leak detected?
YES >> Repair or replace.
NO >> GO TO 2.
2.CHECK FOR INTAKE AIR LEAK AND PCV HOSE
1. Listen for an intake air leak after the mass air flow sensor.
2. Check PCV hose connection.
Intake air leak detected?
YES >> Repair or replace.
NO >> GO TO 3.
3.CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect corresponding A/F sensor 1 harness connector.
3. Disconnect ECM harness connector.
4. Check the continuity between A/F sensor 1 harness connector and ECM harness connector.
5. Check the continuity between A/F sensor 1 harness connector or ECM harness connector and ground.
VHCL SPEED SE50 – 120 km/h (31 – 75 MPH)
PBIB1216E
A/F sensor 1ECM
Continuity
Connector Terminal Connector Terminal
F12 1
F11 49
Existed
25 3
Revision: August 2015 2016 Versa Note

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EC-250
< DTC/CIRCUIT DIAGNOSIS >[HR16DE]
P0171 FUEL INJECTION SYSTEM FUNCTION
6. Also check harness for short to power.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair open circuit or short to ground or short to power in harness or connectors.
4.CHECK FUEL PRESSURE
1. Release fuel pressure to zero. Refer to EC-137, "
Work Procedure".
2. Install fuel pressure gauge and check fuel pressure. Refer to EC-137, "
Work Procedure".
Is the inspection result normal?
YES >> GO TO 6.
NO >> GO TO 5.
5. CHECK FUEL HOSES AND FUEL TUBES
Check fuel hoses and fuel tubes for clogging.
Is the inspection result normal?
YES >> Replace “fuel filter and fuel pump assembly”. Refer to FL-6, "Exploded View".
NO >> Repair or replace
6.CHECK MASS AIR FLOW SENSOR
With CONSULT
1. Install all removed parts.
2. Check “MASS AIRFLOW” in “DATA MONITOR” mode with CONSULT.
With GST
1. Install all removed parts.
2. Check mass air flow sensor signal in Service $01 with GST.
Is the measurement value within the specification?
YES >> GO TO 7.
NO >> Check connectors for rusted terminals or loose connections in the mass air flow sensor circuit or grounds. Refer to EC-190, "
DTC Logic".
7.CHECK FUNCTION OF FUEL INJECTOR
With CONSULT
1. Start engine.
2. Perform “POWER BALANCE” in “ACTIVE TEST” mode with CONSULT.
3. Make sure that each circuit produces a momentary engine speed drop.
A/F sensor 1 Ground Continuity
Connector Terminal
F12 1
Ground Not existed
2
ECM Ground Continuity
Connector Terminal
F11 49
Ground Not existed
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At idling: Approximately 350 kPa (3.57 kg/cm2, 51 psi)
0.8 - 4.0 g/s : at idling
2.0 - 10.0 g/s : at 2,500 rpm
0.8 - 4.0 g/s : at idling
2.0 - 10.0 g/s : at 2,500 rpm
Revision: August 2015 2016 Versa Note

cardiagn.com

EC-252
< DTC/CIRCUIT DIAGNOSIS >[HR16DE]
P0172 FUEL INJECTION SYSTEM FUNCTION
P0172 FUEL INJECTIO
N SYSTEM FUNCTION
DTC LogicINFOID:0000000012431457
DTC DETECTION LOGIC
With the Air/Fuel Mixture Ratio Self-Learning Control, the actual mixture ratio can be brought closely to the
theoretical mixture ratio based on the mixture ratio f eedback signal from the A/F sensor 1. The ECM calcu-
lates the necessary compensation to correct the of fset between the actual and the theoretical ratios.
In case the amount of the compensation value is extrem ely large (The actual mixture ratio is too rich.), the
ECM judges the condition as the fuel injection system malfunction and lights up the MIL (2 trip detection logic).
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure
before conducting the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE-I
1. Clear the mixture ratio self-learning value. Refer to EC-132, "
Description".
2. Start engine.
Is it difficult to start engine?
YES >> GO TO 3.
NO >> GO TO 4.
3.RESTART ENGINE
If it is difficult to start engine, the f uel injection system has a malfunction, too.
Crank engine while depressing accelerator pedal.
NOTE:
When depressing accelerator pedal three-fourths (3/4) or more, the control system may not start the engine.
Do not depress accelerator pedal too much.
Does engine start?
YES >> Go to EC-253, "Diagnosis Procedure".
NO >> Remove spark plugs and check for fouling, etc.
4.PERFORM DTC CONFIRMATION PROCEDURE-II
1. Start engine and let it idle for at least 5 minutes.
2. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Go to EC-253, "Diagnosis Procedure".
NO >> GO TO 5.
5.PERFORM DTC CONFIRMATION PROCEDURE-III
Sensor Input signal to ECM ECM functionActuator
A/F sensor 1 Density of oxygen in exhaust gas
(Mixture ratio feedback signal) Fuel injection control Fuel injector
DTC No. Trouble diagnosis content
DTC detecting condition Possible cause
P0172 Fuel injection system too rich • Fuel injection system does not operate properly.
• The amount of mixture ratio compensation is too
large. (The mixture ratio is too rich.) • A/F sensor 1
• Fuel injector
• Exhaust gas leaks
• Incorrect fuel pressure
• Mass air flow sensor
Revision: August 2015
2016 Versa Note

cardiagn.com

P0172 FUEL INJECTION SYSTEM FUNCTIONEC-253
< DTC/CIRCUIT DIAGNOSIS > [HR16DE]
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1. Turn ignition switch OFF and wait at least 10 seconds.
2. Start engine.
3. Maintain the following conditions for at least 10 consecutive minutes.
Hold the accelerator pedal as steady as possible.
CAUTION:
Always drive vehicle at a safe speed.
4. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Go to EC-253, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000012431458
1.CHECK EXHAUST GAS LEAK
1. Start engine and run it at idle.
2. Listen for an exhaust gas leak before three way catalyst (manifold).
Is exhaust gas leak detected?
YES >> Repair or replace.
NO >> GO TO 2.
2.CHECK FOR INTAKE AIR LEAK
Listen for an intake air leak after the mass air flow sensor.
Is intake air leak detected?
YES >> Repair or replace.
NO >> GO TO 3.
3.CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect corresponding A/F sensor 1 harness connector.
3. Disconnect ECM harness connector.
4. Check the continuity between A/F sensor 1 harness connector and ECM harness connector.
5. Check the continuity between A/F sensor 1 harness connector or ECM harness connector and ground.
VHCL SPEED SE50 – 120 km/h (31 – 75 MPH)
PBIB1216E
A/F sensor 1ECM
Continuity
Connector Terminal Connector Terminal
F12 1
F11 49
Existed
25 3
A/F sensor 1 GroundContinuity
Connector Terminal
F12 1
Ground Not existed
2
Revision: August 2015 2016 Versa Note

cardiagn.com