P0103 NISSAN ALTIMA SEDAN Mass Air Flow Sensor Circuit High Input

Possible causes
– Faulty mass air flow sensor
– Intake air leaks
– Dirty mass air flow sensor
– Dirty mass air filter
– Mass air flow sensor harness is open or shorted
– Mass air flow sensor circuit poor electrical connection
Tech notes
Before replacing the mass air flow sensor, try replacing the air filter and cleaning the air flow sensor with low compress air or mass air flow sensor cleaner. Reset code and drive vehicle. If the code comes back, it may be necessary to replaced the mass air flow sensor.
When is the code detected?
An excessively high voltage from the sensor is sent to Engine Control Module (ECM).
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
– Engine stall
– Engine running rough
– Excessive fuel consumption
– Excessive smoke
P0103 NISSAN ALTIMA SEDAN Description

The Mass Air Flow (MAF) sensor is placed in the stream of intake air. It measures the intake flow rate by measuring a part of the entire intake flow. It consists of a hot film that is supplied with electric current from the Engine Control Module (ECM).

The temperature of the hot film is controlled by the ECM a certain amount. The heat generated by the hot film is reduced as the intake air flows around it. The more air, the greater the heat loss. Therefore, the ECM must supply more electric current to maintain the temperature of the hot film as air flow increases. The ECM detects the air flow by means of this current change.

Compatible with:

2002 NISSAN ALTIMA SEDAN

2003 NISSAN ALTIMA SEDAN

2004 NISSAN ALTIMA SEDAN

2005 NISSAN ALTIMA SEDAN

ddddd

P0102 NISSAN ALTIMA SEDAN Mass or Volume Air Flow Circuit Low Input

Possible causes
– Faulty mass air flow sensor
– Intake air leaks
– Dirty mass air flow sensor
– Dirty mass air filter
– Mass air flow sensor harness is open or shorted
– Mass air flow sensor circuit poor electrical connection

 

Tech notes
Before replacing the mass air flow sensor, try replacing the air filter and cleaning the air flow sensor with low compress air or mass air flow sensor cleaner. Reset code and drive vehicle. If the code comes back, it may be necessary to replaced the mass air flow sensor.

 

When is the code detected?
An excessively low voltage from the sensor is sent to Engine Control Module (ECM).

 

Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
– Engine stall
– Engine running rough
– Excessive fuel consumption
– Excessive smoke

 

P0102 NISSAN ALTIMA SEDAN Description

The Mass Air Flow (MAF) sensor is placed in the stream of intake air. It measures the intake flow rate by measuring a part of the entire intake flow. It consists of a hot film that is supplied with electric current from the Engine Control Module (ECM).

The temperature of the hot film is controlled by the ECM a certain amount. The heat generated by the hot film is reduced as the intake air flows around it. The more air, the greater the heat loss. Therefore, the ECM must supply more electric current to maintain the temperature of the hot film as air flow increases. The ECM detects the air flow by means of this current change.

 

Compatible with:

2002 NISSAN ALTIMA SEDAN
2003 NISSAN ALTIMA SEDAN
2004 NISSAN ALTIMA SEDAN
2005 NISSAN ALTIMA SEDAN
2006 NISSAN ALTIMA SEDAN

ddddd

P0101 NISSAN ALTIMA SEDAN Mass Air Flow Circuit Range/Performance

Possible causes
– Faulty mass air flow sensor
– Intake air leaks
– Dirty mass air flow sensor
– Dirty mass air filter
– Mass air flow sensor harness is open or shorted
– Mass air flow sensor circuit poor electrical connection

 

Tech notes
Before replacing the mass air flow sensor, try replacing the air filter and cleaning the air flow sensor with low compress air or mass air flow sensor cleaner. Reset code and drive vehicle. If the code comes back, it may be necessary to replaced the mass air flow sensor.

There is a factory service bulletin for the following Nissan Models:
2011-2012 Nissan Altima Sedan
2011-2012 Nissan Altima Coupe
2011-2012 Nissan Sentra
2011-2012 Nissan Maxima
2011-2012 Nissan Cube
2011-2012 Nissan Pathfinder
2011-2012 Nissan Xterra
2011-2012 Nissan Frontier

If the P0101 code is set and there are no drivability problems, the factory service bulletin suggest reprogramming the Engine Control Module (ECM) to repair the problem. Bulletin No. NTB12-051d

 

When is the code detected?
– A high voltage from the sensor is sent to Engine Control Module (ECM) under light load driving condition.
– A low voltage from the sensor is sent to ECM

 

Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
– Engine stall
– Engine running rough
– Excessive fuel consumption
– Excessive smoke
P0101 2002 NISSAN ALTIMA SEDAN Description

The Mass Air Flow (MAF) sensor is placed in the stream of intake air. It measures the intake flow rate by measuring a part of the entire intake flow. It consists of a hot film that is supplied with electric current from the Engine Control Module (ECM).

The temperature of the hot film is controlled by the ECM a certain amount. The heat generated by the hot film is reduced as the intake air flows around it. The more air, the greater the heat loss. Therefore, the ECM must supply more electric current to maintain the temperature of the hot film as air flow increases. The ECM detects the air flow by means of this current change.

Compatible with:

2002 NISSAN ALTIMA SEDAN
2003 NISSAN ALTIMA SEDAN
2004 NISSAN ALTIMA SEDAN
2005 NISSAN ALTIMA SEDAN
2006 NISSAN ALTIMA SEDAN

 

ddddd

P0058 NISSAN ALTIMA SEDAN HO2S22 Heater Control Circuit High

Possible causes
– Faulty Heated Oxygen Sensor (H2OS) Bank 2 Sensor 2
– Heated Oxygen Sensor (H2OS) Bank 2 Sensor 2 harness is open shorted
– Heated Oxygen Sensor (H2OS) Bank 2 Sensor 2 circuit poor electrical connection
– Heated Oxygen Sensor (H2OS) Bank 2 Sensor 2 circuit fuse
– Faulty Engine Control Module (ECM)

 

When is the code detected?
The P0058 is set when the ECM detects an excessively high voltage through the heated oxygen sensor heater circuit

 

Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)

 

P0058 2002 NISSAN ALTIMA SEDAN Description

Oxygen Sensors (O2S) or Heated Oxygen Sensors (HO2S) need to reach a minimum operating temperature of 750 degrees F to produce an accurate voltage signal. The faster the heated oxygen sensor reaches that temperature the faster the sensor will start sending an accurate signal to the Engine Control Module (ECM).

In order to achieve the require temperature, a heater element is included inside the heated oxygen sensor. The ECM controls the heated oxygen sensor heater element based on signals from the engine coolant temperature and engine load. The ECM controls the heater element circuit by allowing current flow to ground.

The ECM monitors the voltage signal received through the heater element circuit and determines the state of the circuit by comparing the voltage detected with the factory specifications.

 

Compatible with:

2002 NISSAN ALTIMA SEDAN
2003 NISSAN ALTIMA SEDAN
2004 NISSAN ALTIMA SEDAN
2005 NISSAN ALTIMA SEDAN
2006 NISSAN ALTIMA SEDAN

 

ddddd

P0057 NISSAN ALTIMA SEDAN HO2S22 Heater Control Circuit Low

Possible causes
– Faulty Heated Oxygen Sensor (H2OS) Bank 2 Sensor 2
– Heated Oxygen Sensor (H2OS) Bank 2 Sensor 2 harness is open shorted
– Heated Oxygen Sensor (H2OS) Bank 2 Sensor 2 circuit poor electrical connection
– Heated Oxygen Sensor (H2OS) Bank 2 Sensor 2 circuit fuse
– Faulty Engine Control Module (ECM)
Tech notes
The code means that there is a problem with the heater element circuit of the heated oxygen sensor. Water getting inside the heated oxygen sensor connector can caused the heated oxygen sensor fuse to blow, which is a very common problem for this type codes. Before replacing the sensor, check for the condition of the heated oxygen sensor fuse and connectors.

 

When is the code detected?
The P0057 is set when the ECM detects an excessively low voltage through the heated oxygen sensor heater circuit

 

Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
P0057 NISSAN ALTIMA SEDAN Description

Oxygen Sensors (O2S) or Heated Oxygen Sensors (HO2S) need to reach a minimum operating temperature of 750 degrees F to produce an accurate voltage signal. The faster the heated oxygen sensor reaches that temperature the faster the sensor will start sending an accurate signal to the Engine Control Module (ECM).

In order to achieve the require temperature, a heater element is included inside the heated oxygen sensor. The ECM controls the heated oxygen sensor heater element based on signals from the engine coolant temperature and engine load. The ECM controls the heater element circuit by allowing current flow to ground.

The ECM monitors the voltage signal received through the heater element circuit and determines the state of the circuit by comparing the voltage detected with the factory specifications.

 

Compatible with:

2002 NISSAN ALTIMA SEDAN
2003 NISSAN ALTIMA SEDAN
2004 NISSAN ALTIMA SEDAN
2005 NISSAN ALTIMA SEDAN
2006 NISSAN ALTIMA SEDAN

 

ddddd

P0021 NISSAN ALTIMA SEDAN Intake Valve Timing Control Performance Bank 2

Possible causes
– Faulty Intake Valve Timing Control Solenoid Valve
– Intake Valve Timing Control Solenoid Valve harness is open or shorted
– Intake Valve Timing Control Solenoid Valve circuit poor electrical connection
– Faulty Camshaft Position Sensor
– Camshaft Position Sensor harness is open or shorted
– Camshaft Position Sensor circuit poor electrical connection
– Faulty Crankshaft Position Sensor (POS)
Tech notes
Since the Intake valve timing control solenoid valve uses oil flow to control timing, dirty oil can cause the valve to stuck open or close. Before replacing the valve, change engine oil and filter and reset engine code.
When is the code detected?
When there is a gap between angle of target and phase-control angle degree, the valve will stop working and the ECM will trigger the P0021 code.
Symptoms
Engine Light ON (or Service Engine Soon Warning Light)
– Lack/Loss of power
– Engine rough idle
P0021 NISSAN ALTIMA SEDAN Description

This mechanism hydraulically controls cam phases continuously with the fixed operating angle of the intake valve.

The ECM receives signals such as crankshaft position, camshaft position, engine speed, and engine coolant temperature. Then, the ECM sends ON/OFF pulse duty signals to the intake valve timing control solenoid valve depending on driving status. This makes it possible to control the shut/open timing of the intake valve to increase engine torque in low/mid speed range and output in high-speed range.

The intake valve timing control solenoid valve changes the oil amount and direction of flow through intake valve timing control unit or stops oil flow. The longer pulse width advances valve angle. The shorter pulse width retards valve angle. When ON and OFF pulse widths become equal, the solenoid valve stops oil pressure flow to fix the intake valve angle at the control position.

Compatible with:
2002 NISSAN ALTIMA SEDAN
2003 NISSAN ALTIMA SEDAN
2004 NISSAN ALTIMA SEDAN
2005 NISSAN ALTIMA SEDAN
2006 NISSAN ALTIMA SEDAN

ddddd

P1052 NISSAN ALTIMA SEDAN Air Fuel Ratio Sensor 1 Heater Control Circuit High Bank 2

Possible causes
– Air Fuel Ratio Sensor 1 Bank 2 harness is open or shorted
– Air Fuel Ratio Sensor 1 Bank 2 circuit poor electrical connection
– Faulty Air Fuel Ratio Sensor 1 Bank 2
When is the code detected?
The current amperage in the heated air fuel ratio (A/F) sensor 1 heater circuit is out of the normal range. An excessively high voltage signal is sent to Engine Control Module (ECM) through the heated air fuel ratio (A/F) sensor 1 heater.
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
P1052 NISSAN ALTIMA SEDAN Description

The Engine Control Module (ECM) performs ON/OFF duty control of the Air Fuel Ratio (A/F) sensor 1 heater corresponding to the engine operating condition to keep the temperature of A/F sensor 1 element at the specified range.

Compatible with:
2005 NISSAN ALTIMA SEDAN

ddddd

P1065 NISSAN ALTIMA SEDAN ECM Power Supply Circuit

Possible causes
ECM Harness power supply circuit is open or shorted
– ECM Harness ground supply circuit is open or shorted
– ECM may be faulty
When is the code detected?
ECM back-up RAM system does not function properly.
Symptoms
Engine Light ON (or Service Engine Soon Warning Light)
P1065 NISSAN ALTIMA SEDAN Description

Battery voltage is supplied to the Engine Control Module (ECM) even when the ignition switch is turned OFF for the ECM memory function of the DTC memory, the air-fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc.

Compatible with:
2005 NISSAN ALTIMA SEDAN

ddddd

P1111 NISSAN ALTIMA SEDAN Intake Valve Timing Control Solenoid Valve Circuit Bank 1

Possible causes
– Faulty Intake Valve Timing Control Solenoid Valve Bank 1
– Intake Valve Timing Control Solenoid Valve Bank 1 harness is open or shorted
– Intake Valve Timing Control Solenoid Valve Bank 1 circuit poor electrical connection
Tech notes
Since the Intake valve timing control solenoid valve uses oil flow to control timing, dirty oil can cause the valve to stuck open or close. Before replacing the valve, change engine oil and filter and reset engine code.
When is the code detected?
An improper voltage is sent to the ECM through intake valve timing control solenoid valve.
Symptoms
Engine Light ON (or Service Engine Soon Warning Light)
– Possible engine lack/loss of power
– Posssible engine rough idle
P1111 NISSAN ALTIMA SEDAN Description

Intake valve timing control solenoid valve is activated by ON/OFF pulse duty (ratio) signals from the ECM. The intake valve timing control solenoid valve changes the oil amount and direction of flow through intake valve timing control unit or stops oil flow.

The longer pulse width advances valve angle. The shorter pulse width retards valve angle.

When ON and OFF pulse widths become equal, the solenoid valve stops oil pressure flow to fix the intake valve angle at the control position.

Compatible with:
2002 NISSAN ALTIMA SEDAN
2003 NISSAN ALTIMA SEDAN
2004 NISSAN ALTIMA SEDAN
2005 NISSAN ALTIMA SEDAN

ddddd

P1121 NISSAN ALTIMA SEDAN Electric Throttle Control Actuator

Possible causes
– Faulty Electric Throttle Control Actuator
– Electric Throttle Control Actuator harness is open or shorted
– Electric Throttle Control Actuator circuit poor electrical connection
When is the code detected?
Electric throttle control actuator does not function properly due to the return spring malfunction or throttle valve is stuck open
Symptoms
Engine Light ON (or Service Engine Soon Warning Light)
– No throttle pedal response
P1121 NISSAN ALTIMA SEDAN Description

Electric Throttle Control Actuator consists of throttle control motor, Throttle Position Sensor (TPS), etc. The throttle control motor is operated by the Engine Control Module (ECM) and it opens and closes the throttle valve.

The throttle position sensor detects the throttle valve position, and the opening and closing speed of the throttle valve and feeds the voltage signals to the ECM. The ECM judges the current opening angle of the throttle valve from these signals and the ECM controls the throttle control motor to make the throttle valve opening angle properly in response to driving condition.

Compatible with:
2002 NISSAN ALTIMA SEDAN
2003 NISSAN ALTIMA SEDAN
2004 NISSAN ALTIMA SEDAN
2005 NISSAN ALTIMA SEDAN

ddddd

P1122 NISSAN ALTIMA SEDAN Electric Throttle Control Performance Problem

Possible causes
– Faulty Electric Throttle Control Actuator
– Electric Throttle Control Actuator harness is open or shorted
– Electric Throttle Control Actuator circuit poor electrical connection
Tech notes
Start by performing the “Idle Air Volume Learning Procedure”, if the problem persist the Electric Throttle Control Actuator may need to be replaced.There is a factory service bulletin for the following Nissan models:

2002 Nissan Altima
2003 Nissan Altima
2004 Nissan Altima
2005 Nissan Altima
2002-2005 Nissan Altima Service Bulletin OBD2 Code P1122

When is the code detected?
Electric throttle control function does not operate properly.
Symptoms
Engine Light ON (or Service Engine Soon Warning Light)
P1122 NISSAN ALTIMA SEDAN Description

Electric Throttle Control Actuator consists of throttle control motor, Throttle Position Sensor (TPS), etc. The throttle control motor is operated by the Engine Control Module (ECM) and it opens and closes the throttle valve.

The throttle position sensor detects the throttle valve position, and the opening and closing speed of the throttle valve and feeds the voltage signals to the ECM. The ECM judges the current opening angle of the throttle valve from these signals and the ECM controls the throttle control motor to make the throttle valve opening angle properly in response to driving condition.

Compatible with:

2002 NISSAN ALTIMA SEDAN
2003 NISSAN ALTIMA SEDAN
2004 NISSAN ALTIMA SEDAN
2005 NISSAN ALTIMA SEDAN

ddddd

P1124 NISSAN ALTIMA SEDAN Throttle Control Motor Relay Circuit Short

Possible causes
– Fualty Throttle Control Motor relay
– Throttle Control Motor relay harness is open or shorted
– Throttle Control Motor relay circuit poor electrical connection
When is the code detected?
Engine Control Module (ECM) detect the throttle control motor relay is stuck ON.
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
P1124 NISSAN ALTIMA SEDAN Description

Power supply for the throttle control motor is provided to the Engine Control Module (ECM) via throttle control motor relay. The throttle control motor relay is ON/OFF controlled by the ECM. When the ignition switch is turned ON, the ECM sends an ON signal to throttle control motor relay and battery voltage is provided to the ECM. When the ignition switch is turned OFF, the ECM sends an OFF signal to throttle control motor relay and battery voltage is not provided to the ECM.

Compatible with:

2002 NISSAN ALTIMA SEDAN
2003 NISSAN ALTIMA SEDAN
2004 NISSAN ALTIMA SEDAN
2005 NISSAN ALTIMA SEDAN
2006 NISSAN ALTIMA SEDAN

ddddd

P1126 NISSAN ALTIMA SEDAN Throttle Control Motor Relay Circuit Open

Possible causes
– Fualty Throttle Control Motor relay
– Throttle Control Motor relay harness is open or shorted
– Throttle Control Motor relay circuit poor electrical connection
When is the code detected?
Engine Control Module (ECM) detects a voltage of power source for throttle control motor is excessively low.
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
P1126 NISSAN ALTIMA SEDAN Description

Power supply for the throttle control motor is provided to the Engine Control Module (ECM) via throttle control motor relay. The throttle control motor relay is ON/OFF controlled by the ECM. When the ignition switch is turned ON, the ECM sends an ON signal to throttle control motor relay and battery voltage is provided to the ECM. When the ignition switch is turned OFF, the ECM sends an OFF signal to throttle control motor relay and battery voltage is not provided to the ECM.

Compatible with:
2002 NISSAN ALTIMA SEDAN
2003 NISSAN ALTIMA SEDAN
2004 NISSAN ALTIMA SEDAN
2005 NISSAN ALTIMA SEDAN

ddddd

P1128 NISSAN ALTIMA SEDAN Throttle Control Motor Circuit Short

Possible causes
– Faulty Throttle Control Motor
– Throttle Control Motor harness is open or shorted
– Throttle Control Motor circuit poor electrical connection
When is the code detected?
Engine Control Module (ECM) detects short both circuits between ECM and throttle control motor.
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
P1128 NISSAN ALTIMA SEDAN Description

The throttle control motor is operated by the Engine Control Module (ECM) and it opens and closes the throttle valve.

The current opening angle of the throttle valve is detected by the throttle position sensor and it provides feedback to the ECM to control the throttle control motor to make the throttle valve opening angle properly in response to driving condition.

 

Compatible with:
2
002 NISSAN ALTIMA SEDAN
2003 NISSAN ALTIMA SEDAN
2004 NISSAN ALTIMA SEDAN
2005 NISSAN ALTIMA SEDAN

ddddd

P1143 NISSAN ALTIMA SEDAN Heated Oxygen Sensor 1 Lean Shift Monitoring Bank 1

Possible causes
– Faulty Front Heated Oxygen Sensor Bank 1
– Intake air leaks
– Front Heated Oxygen Sensor Bank 1 harness is open or shorted
– Front Heated Oxygen Sensor Bank 1 circuit poor electrical connection
– Fuel pressure
– Injectors
Tech notes
If there are no intake air leaks, the most likely cause of the P1143 code is the front O2 sensor bank 1.
When is the code detected?
The maximum and minimum voltage from the sensor are not reached to the specified voltages.
Symptoms
Engine Light ON (or Service Engine Soon Warning Light)
P1143 NISSAN ALTIMA SEDAN Description

The heated oxygen sensor 1 is placed into the front tube. It detects the amount of oxygen in the exhaust gas compared to the outside air. The heated oxygen sensor 1 has a closed-end tube made of ceramic zirconia. The zirconia generates voltage from approximately 1V in richer conditions to 0V in leaner conditions. The heated oxygen sensor 1 signal is sent to the ECM. The ECM adjusts the injection pulse duration to achieve the ideal air-fuel ratio. The ideal air-fuel ratio occurs near the radical change from 1V to 0V.

 

Compatible with:

2002 NISSAN ALTIMA SEDAN

2003 NISSAN ALTIMA SEDAN

2004 NISSAN ALTIMA SEDAN

ddddd

P1144 NISSAN ALTIMA SEDAN Heated Oxygen Sensor 1 Rich Shift Monitoring

Possible causes
– Faulty Front Heated Oxygen Sensor Bank 1
– Front Heated Oxygen Sensor Bank 1 harness is open or shorted
– Front Heated Oxygen Sensor Bank 1 circuit poor electrical connection
– Inappropriate fuel pressure
– Faulty fuel injectors
– Intake air leaks may be faulty
– Exhaust gas leaks
Tech notes
Replacing the O2 Sensor 1 Bank 1 usually takes care of the problem.
When is the code detected?
An excessively high voltage from the sensor is sent to Engine Control Module (ECM).
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
– High Fuel Consumption
– Excessive Smoke from Exhaust
P1144 NISSAN ALTIMA SEDAN Description

The front heated oxygen sensor (or O2 sensor 1) is placed into the exhaust manifold. It detects the amount of oxygen in the exhaust gas compared to the outside air. The heated oxygen sensor 1 has a closed-end tube made of ceramic zirconia. The zirconia generates voltage from approximately 1V in richer conditions to 0V in leaner conditions. The heated oxygen sensor 1 signal is sent to the Engine Control Module (ECM). The ECM adjusts the injection pulse duration to achieve the ideal air-fuel ratio. The ideal air-fuel ratio occurs near the radical change from 1V to 0V.

 

Compatible with:

2002 NISSAN ALTIMA SEDAN

2003 NISSAN ALTIMA SEDAN

2004 NISSAN ALTIMA SEDAN

ddddd

P1146 NISSAN ALTIMA SEDAN Heated Oxygen Sensor 2 Minimum Voltage Monitoring Bank 1

Possible causes
– Faulty heated oxygen (O2) sensor 2 (rear)
– Intake air leaks
– Heated oxygen (O2) sensor 2 (rear) harness is open or shorted
– Heated oxygen (O2) sensor 2 (rear) circuit poor electrical connection
– Inappropriate fuel pressure
– Faulty fuel injectors
Tech notes
Replacing the O2 Sensor 2 usually takes care of the problem
Symptoms
Engine Light ON (or Service Engine Soon Warning Light)
– High Fuel Consumption
– Excessive Smoke from Exhaust
P1146 NISSAN ALTIMA SEDAN Description

The Heated Oxygen Sensor 2 (HO2S) (Rear O2 Sensor), after three way catalyst (manifold), monitors the oxygen level in the exhaust gas on each bank. For optimum catalyst operation, the air fuel mixture (air-fuel ratio) must be maintained near the ideal stoichiometric ratio. The HO2S output voltage changes suddenly in the vicinity of the stoichiometric ratio. The Engine Control Module (ECM) adjusts the fuel injection time so that the air-fuel ratio is nearly stoichiometric. The HO2S generates a voltage between 0.1 and 0.9 V in response to oxygen in the exhaust gas. If the oxygen in the exhaust gas increases, the air-fuel ratio becomes Lean. The ECM interprets Lean when the HO2S voltage is below 0.45 V. If the oxygen in the exhaust gas decreases, the air-fuel ratio becomes Rich. The ECM interprets Rich when the HO2S voltage is above 0.45 V.

 

Compatible with:

2002 NISSAN ALTIMA SEDAN

2003 NISSAN ALTIMA SEDAN

2004 NISSAN ALTIMA SEDAN

2005 NISSAN ALTIMA SEDAN

2006 NISSAN ALTIMA SEDAN

ddddd

P1147 NISSAN ALTIMA SEDAN Heated Oxygen Sensor 2 Maximum Voltage Monitoring Bank 1

Possible causes
– Faulty heated oxygen (O2) sensor 2 (rear)
– Intake air leaks
– Heated oxygen (O2) sensor 2 (rear) harness is open or shorted
– Heated oxygen (O2) sensor 2 (rear) circuit poor electrical connection
– Inappropriate fuel pressure
– Faulty fuel injectors
Tech notes
Replacing the O2 Sensor 2 usually takes care of the problem
When is the code detected?
The P1147 code is triggered when the maximum voltage from the sensor is not reached to the specified voltage.
Symptoms
Engine Light ON (or Service Engine Soon Warning Light)
– Possible high fuel consumption
– Possible excessive smoke from exhaust
P1147 NISSAN ALTIMA SEDAN Description

The Heated Oxygen Sensor 2 (HO2S) (Rear O2 Sensor), after three way catalyst (manifold), monitors the oxygen level in the exhaust gas on each bank. For optimum catalyst operation, the air fuel mixture (air-fuel ratio) must be maintained near the ideal stoichiometric ratio. The HO2S output voltage changes suddenly in the vicinity of the stoichiometric ratio. The Engine Control Module (ECM) adjusts the fuel injection time so that the air-fuel ratio is nearly stoichiometric. The HO2S generates a voltage between 0.1 and 0.9 V in response to oxygen in the exhaust gas. If the oxygen in the exhaust gas increases, the air-fuel ratio becomes Lean. The ECM interprets Lean when the HO2S voltage is below 0.45 V. If the oxygen in the exhaust gas decreases, the air-fuel ratio becomes Rich. The ECM interprets Rich when the HO2S voltage is above 0.45 V.

Compatible with:

2002 NISSAN ALTIMA SEDAN

2003 NISSAN ALTIMA SEDAN

2004 NISSAN ALTIMA SEDAN

2005 NISSAN ALTIMA SEDAN

2006 NISSAN ALTIMA SEDAN

ddddd

P1148 NISSAN ALTIMA SEDAN Closed Loop Control Function Bank 1

Possible causes
For Models before 2005:
– Faulty Heated Oxygen Sensor 1 Bank 1
– Heated Oxygen Sensor 1 Bank 1 circuit is open or shorted
– Heated Oxygen Sensor 1 Bank 1 circuit electrical connection
When is the code detected?
The closed loop control function for bank 1 does not operate even when vehicle is driving in the specified condition, the closed loop control function for bank 2 does not operate even when vehicle is driving in the specified condition.
Symptoms
Engine Light ON (or Service Engine Soon Warning Light)
P1148 NISSAN ALTIMA SEDAN Description

The Engine Control Module (ECM) performs ON/OFF duty control of the Air Fuel Ratio (A/F)/Heated Oxygen Sensor 1 heater corresponding to the engine operating condition to keep the temperature of Air Fuel Ratio (A/F)/Heated Oxygen Sensor 1 element at the specified range.

Compatible with:

2002 NISSAN ALTIMA SEDAN

2003 NISSAN ALTIMA SEDAN

2004 NISSAN ALTIMA SEDAN

2005 NISSAN ALTIMA SEDAN

2006 NISSAN ALTIMA SEDAN

ddddd

P1163 NISSAN ALTIMA SEDAN Heated Oxygen Sensor 1 Lean Shift Monitoring Bank 2

Possible causes
– Front Heated Oxygen Sensor Bank 2
– Front Heated oxygen sensor 1 heater
– Fuel pressure
– Injectors
– Intake air leaks
Tech notes
If there are no intake air leaks, the most likely cause of the P1163 code is the front O2 sensor bank 2.
When is the code detected?
The maximum and minimum voltage from the sensor are not reached to the specified voltages.
Symptoms
Engine Light ON (or Service Engine Soon Warning Light)
P1163 NISSAN ALTIMA SEDAN Description

The heated oxygen sensor 1 is placed into the front tube. It detects the amount of oxygen in the exhaust gas compared to the outside air. The heated oxygen sensor 1 has a closed-end tube made of ceramic zirconia. The zirconia generates voltage from approximately 1V in richer conditions to 0V in leaner conditions. The heated oxygen sensor 1 signal is sent to the ECM. The ECM adjusts the injection pulse duration to achieve the ideal air-fuel ratio. The ideal air-fuel ratio occurs near the radical change from 1V to 0V.

Compatible with:

2002 NISSAN ALTIMA SEDAN

2003 NISSAN ALTIMA SEDAN

2004 NISSAN ALTIMA SEDAN

ddddd

NOTE:

This website obd ii codes information is presented for information purposes only. It is not intended as repair advice and we are not responsible for any actions you take on any vehicle.