P0171 P0132 P0174 P0171 P0462 P0430 P0420

1. P0171 2002 Nissan SentraP0171 2002 Nissan Sentra - Fuel Injection System Too Lean Bank 1

 

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Possible causes- Intake air leaks

- Faulty front heated oxygen sensor- Ignition misfiring- Faulty fuel injectors- Exhaust gas leaks- Incorrect fuel pressure- Lack of fuel- Faulty Mass Air Flow (MAF) sensor- Incorrect Positive Crankcase Ventilation (PCV) hose connection

 What does this mean?

Tech notesIf the P0171 is combined with the P0174 code, it's very likely that the problem is caused by an intake leak. If there are no intake leaks, the next step is to replaced the air filter and clean the air flow meter. If the problem persist the front oxygen (O2) sensor may need to be replaced.

 What does this mean?

When is the code detected?- Fuel injection system does not operate properly.- The amount of mixture ratio compensation is too small. (The mixture ratio is too lean.)

Possible symptoms- Engine Light ON (or Service Engine Soon Warning Light)- Excessive Fuel Consumption

P0171 2002 Nissan Sentra Description

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 feedback signal from the heated oxygen sensors 1. The Engine Control Module (ECM) calculates the necessary compensation to correct the offset 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 light up the MIL (2 trip detection logic).

Read more: http://engine-codes.com/p0171_2002_nissan_sentra.html#ixzz3h3KP0DV8

Possible causes- Intake air leaks- Faulty front heated oxygen sensor- Ignition misfiring- Faulty fuel injectors- Exhaust gas leaks- Incorrect fuel pressure- Lack of fuel- Faulty Mass Air Flow (MAF) sensor- Incorrect Positive Crankcase Ventilation (PCV) hose connection

 What does this mean?

Tech notesIf the P0171 is combined with the P0174 code, it's very likely that the problem is caused by an intake leak. If there are no intake leaks, the next step is to replaced the air filter and clean the air flow meter. If the problem persist the front oxygen (O2) sensor may need to be replaced.

There is a factory service bulletin for the following Nissan models:

2004 Maxima (A34) with 5 speed A/T only2004 Quest (V42) with 5 speed A/T onlyNissan Factory Service Bulletin OBDII Code P0171

2004 Maxima (A34) with 4-speed A/T and 6-speed M/T2004 Quest (V42) with 4-speed A/TNissan Factory Service Bulletin OBDII Code P0171

 What does this mean?

When is the code detected?- Fuel injection system does not operate properly.- The amount of mixture ratio compensation is too small. (The mixture ratio is too lean.)

Possible symptoms- Engine Light ON (or Service Engine Soon Warning Light)- Excessive Fuel Consumption

P0171 Nissan Description

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 feedback signal from the heated oxygen sensors 1. The Engine Control Module (ECM) calculates the necessary compensation to correct the offset 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 light up the MIL (2 trip detection logic).

Read more: http://engine-codes.com/p0171_nissan.html#ixzz3h3KCrKhy

2. P0132 2002 Nissan SentraP0132 2002 Nissan Sentra - Air Fuel Ratio Circuit High Bank 1 Sensor 1

 

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Possible causes- Faulty Air fuel ratio (A/F) sensor 1 bank 1- Air fuel ratio (A/F) sensor 1 bank 1 harness is open or shorted- Air fuel ratio (A/F) sensor 1 bank 1 circuit poor electrical connection- Inappropriate fuel pressure- Faulty fuel injectors- Intake air leaks may be faulty- Exhaust gas leaks

 What does this mean?

Tech notesReplacing the Air fuel ratio (A/F) sensor 1 bank 1 usually takes care of the problem.

For Nissan models before 2005 see: P0132 Nissan  What does this mean?

When is the code detected?

The Air Fuel Ratio (A/F) signal computed by Engine Control Module (ECM) from the A/F sensor 1 signal is constantly approx. 5V.

Possible symptoms- Engine Light ON (or Service Engine Soon Warning Light)- High Fuel Consumption- Excessive Smoke from Exhaust

P0132 2002 Nissan Sentra Description

The Air Fuel Ratio (A/F) sensor is a planar dual-cell limit current sensor. The sensor element of the A/F sensor is the combination of a Nernst concentration cell (sensor cell) with an oxygen-pump cell, which transports ions. It has a heater in the element.

The sensor is capable of precise measurement λ= 1, but also in the lean and rich range. Together with its control electronics, the sensor outputs a clear, continuous signal throughout a wide range (0.7 < λ < air).

The exhaust gas components diffuse through the diffusion gap at the electrode of the oxygen pump and Nernst concentration cell, where they are brought to thermodynamic balance. An electronic circuit controls the pump current through the oxygen pump cell so that the composition of the exhaust gas in the diffusion gap remains constant at λ = 1. Therefore, the A/F sensor is able to indicate air/fuel ratio by this pumping of current. In addition, a heater is integrated in the sensor to ensure the required operating temperature of 700 - 800°C (1,292 - 1,472°F).

Need more help?

Do you need more help with the P0132 2002 Nissan Sentra code? ask a question to our users or search the top hand picked automotive forums for more information

Read more: http://engine-codes.com/p0132_2002_nissan_sentra.html#ixzz3h3L6qmrL

P0132 NissanP0132 Nissan - Air Fuel Ratio Circuit High Bank 1 Sensor 1

 

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Possible causes- Faulty Air fuel ratio (A/F) sensor 1 bank 1- Air fuel ratio (A/F) sensor 1 bank 1 harness is open or shorted- Air fuel ratio (A/F) sensor 1 bank 1 circuit poor electrical connection- Inappropriate fuel pressure- Faulty fuel injectors- Intake air leaks may be faulty- Exhaust gas leaks

 What does this mean?

Tech notesReplacing the Air fuel ratio (A/F) sensor 1 bank 1 usually takes care of the problem.

For Nissan models before 2005 see: P0132 Nissan  What does this mean?

When is the code detected?The Air Fuel Ratio (A/F) signal computed by Engine Control Module (ECM) from the A/F sensor 1 signal is constantly approx. 5V.

Possible symptoms- Engine Light ON (or Service Engine Soon Warning Light)- High Fuel Consumption- Excessive Smoke from Exhaust

P0132 Nissan Description

The Air Fuel Ratio (A/F) sensor is a planar dual-cell limit current sensor. The sensor element of the A/F sensor is the combination of a Nernst concentration cell (sensor cell) with an oxygen-pump cell, which transports ions. It has a heater in the element.

The sensor is capable of precise measurement λ= 1, but also in the lean and rich range. Together with its control electronics, the sensor outputs a clear, continuous signal throughout a wide range (0.7 < λ < air).

The exhaust gas components diffuse through the diffusion gap at the electrode of the oxygen pump and Nernst concentration cell, where they are brought to thermodynamic balance. An electronic circuit controls the pump current through the oxygen pump cell so that the composition of the exhaust gas in the diffusion gap remains constant at λ = 1. Therefore, the A/F sensor is able to indicate air/fuel ratio by this pumping of current. In addition, a heater is integrated in the sensor to ensure the required operating temperature of 700 - 800°C (1,292 - 1,472°F).

Read more: http://engine-codes.com/p0132_nissan-2.html#ixzz3h3KmbX52

3. P0174 2002 Nissan SentraP0174 2002 Nissan Sentra - Fuel Injection System Too Lean Bank 2

 

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Possible causes- Intake air leaks- Faulty front heated oxygen sensor- Ignition misfiring- Faulty fuel injectors- Exhaust gas leaks- Incorrect fuel pressure- Lack of fuel- Faulty Mass Air Flow (MAF) sensor- Incorrect Positive Crankcase Ventilation (PCV) hose connection

 What does this mean?

When is the code detected?- Fuel injection system does not operate properly.- The amount of mixture ratio compensation is too small. (The mixture ratio is too lean.)

Possible symptoms- Engine Light ON (or Service Engine Soon Warning Light)- Excessive Fuel Consumption

P0174 2002 Nissan Sentra Description

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 feedback signal from the heated oxygen sensors 1. The Engine Control Module (ECM) calculates the necessary compensation to correct the offset 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 light up the MIL (2 trip detection logic).

Read more: http://engine-codes.com/p0174_2002_nissan_sentra.html#ixzz3h3MNCQIt

P0174 NissanP0174 Nissan - Fuel Injection System Too Lean Bank 2

 

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Possible causes- Intake air leaks- Faulty front heated oxygen sensor- Ignition misfiring- Faulty fuel injectors- Exhaust gas leaks- Incorrect fuel pressure- Lack of fuel- Faulty Mass Air Flow (MAF) sensor- Incorrect Positive Crankcase Ventilation (PCV) hose connection

 What does this mean?

Tech notesIf the P0171 is combined with the P0174 code, it's very likely that the problem is caused by an intake leak. If there are no intake leaks, the next step is to replaced the air filter and clean the air flow meter. If the problem persist the front oxygen (O2) sensor may need to be replaced.

There is a factory service bulletin for the following Nissan models:

2004 Maxima (A34) with 5 speed A/T only2004 Quest (V42) with 5 speed A/T onlyNissan Factory Service Bulletin OBDII Code P0174

2004 Maxima (A34) with 4-speed A/T and 6-speed M/T2004 Quest (V42) with 4-speed A/TNissan Factory Service Bulletin OBDII Code P0174

 What does this mean?

When is the code detected?- Fuel injection system does not operate properly.- The amount of mixture ratio compensation is too small. (The mixture ratio is too lean.)

Possible symptoms- Engine Light ON (or Service Engine Soon Warning Light)- Excessive Fuel Consumption

P0174 Nissan Description

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 feedback signal from the heated oxygen sensors 1. The Engine Control Module (ECM) calculates the necessary compensation to correct the offset 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 light up the MIL (2 trip detection logic).

Read more: http://engine-codes.com/p0174_nissan.html#ixzz3h3M4lThO

4. P0462 2002 Nissan SentraP0462 2002 Nissan Sentra - Fuel Level Sensor Circuit Low Input

 

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Possible causes- Faulty fuel level sensor- Fuel level sensor harness is open or shorted- Fuel level sensor circuit poor electrical connection

 What does this mean?

Tech notesLow fuel level can trigger this code. Before replacing any parts try filling up the fuel tank and erasing the engine code. If the problem persist it may be necessary to replaced the fuel level sensor.

 What does this mean?

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

Possible symptoms- Engine Light ON (or Service Engine Soon Warning Light)- Incorrect fuel level reading

P0462 2002 Nissan Sentra Description

The fuel level sensor is mounted in the fuel level sensor unit. The sensor detects a fuel level in the fuel tank and transmits a signal to the Engine Control Module (ECM). The fuel level sensor consists of two parts, one is mechanical float and the other side is variable resistor. The fuel level sensor output voltage changes depending on the movement of the fuel mechanical float.

Need more help?Do you need more help with the P0462 2002 Nissan Sentra code? ask a question to our users or search the top hand picked automotive forums for more information

Read more: http://engine-codes.com/p0462_2002_nissan_sentra.html#ixzz3h3PoaXwN

P0462 NissanP0462 Nissan - Fuel Level Sensor Circuit Low Input

 

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Possible causes- Faulty fuel level sensor- Fuel level sensor harness is open or shorted- Fuel level sensor circuit poor electrical connection

 What does this mean?

Tech notesLow fuel level can trigger this code. Before replacing any parts try filling up the fuel tank and erasing the engine code. If the problem persist it may be necessary to replaced the fuel level sensor.

 What does this mean?

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

Possible symptoms- Engine Light ON (or Service Engine Soon Warning Light)- Incorrect fuel level reading

P0462 Nissan Description

The fuel level sensor is mounted in the fuel level sensor unit. The sensor detects a fuel level in the fuel tank and transmits a signal to the Engine Control Module (ECM). The fuel level sensor consists of two parts, one is mechanical float and the other side is variable resistor. The fuel level sensor output voltage changes depending on the movement of the fuel mechanical float.

Read more: http://engine-codes.com/p0462_nissan.html#ixzz3h3PIU1by

5. P0430 2002 Nissan SentraP0430 2002 Nissan Sentra - Catalyst System Efficiency Below Threshold Bank 2

 

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Possible causes- Three way catalyst converter Bank 2- Exhaust tube- Intake air leaks- Fuel injectors may be faulty- Fuel injector leaks- Spark plugs may be faulty- Improper ignition timing- Engine Control Module (ECM)

 What does this mean?

Tech notes

As the code description implies the P0430 code means that the vehicle's control module has detected that the three-way catalytic converter is not working properly (is not as efficient as the factory is expecting). Replacing the oxygen (O2) sensors may sometimes fix the code, but in most cases the catalytic convert needs to be replaced to fix the problem. If the P0430 code is combined with other codes, try fixing the other codes first.

 What does this mean?

When is the code detected?- Three way catalytic converter Bank 1 does not operate properly.- Three way catalyst converter Bank 1 does not have enough oxygen storage capacity.

Possible symptoms- Engine Light ON (or Service Engine Soon Warning Light)

P0430 2002 Nissan Sentra Description

The Engine Control Module (ECM) monitors the switching frequency ratio of heated oxygen sensors 1 (front O2 sensor) and heated oxygen sensors 2 (rear O2 sensor).

A three way catalyst converter (Manifold) with high oxygen storage capacity will indicate a low switching frequency of heated oxygen sensor 2. As oxygen storage capacity decreases, the heated oxygen sensor 2 switching frequency will increase.

When the frequency ratio of heated oxygen sensors 1 and 2 approaches a specified limit value, the three way catalyst malfunction is diagnosed.

Read more: http://engine-codes.com/p0430_2002_nissan_sentra.html#ixzz3h3RinxeR

P0430 NissanP0430 Nissan - Catalyst System Efficiency Below Threshold Bank 2

 

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Possible causes- Three way catalyst converter Bank 2- Exhaust tube- Intake air leaks- Fuel injectors may be faulty

- Fuel injector leaks- Spark plugs may be faulty- Improper ignition timing- Engine Control Module (ECM)

 What does this mean?

Tech notesAs the code description implies the P0430 code means that the vehicle's control module has detected that the three-way catalytic converter is not working properly (is not as efficient as the factory is expecting). Replacing the oxygen (O2) sensors may sometimes fix the code, but in most cases the catalytic convert needs to be replaced to fix the problem. If the P0430 code is combined with other codes, try fixing the other codes first.

 What does this mean?

When is the code detected?- Three way catalytic converter Bank 1 does not operate properly.- Three way catalyst converter Bank 1 does not have enough oxygen storage capacity.

Possible symptoms- Engine Light ON (or Service Engine Soon Warning Light)

P0430 Nissan Description

The Engine Control Module (ECM) monitors the switching frequency ratio of heated oxygen sensors 1 (front O2 sensor) and heated oxygen sensors 2 (rear O2 sensor).

A three way catalyst converter (Manifold) with high oxygen storage capacity will indicate a low switching frequency of heated oxygen sensor 2. As oxygen storage capacity decreases, the heated oxygen sensor 2 switching frequency will increase.

When the frequency ratio of heated oxygen sensors 1 and 2 approaches a specified limit value, the three way catalyst malfunction is diagnosed.

Read more: http://engine-codes.com/p0430_nissan.html#ixzz3h3RAV2GVV

6. P0420 2002 Nissan SentraP0420 2002 Nissan Sentra - Catalyst System Efficiency Below Threshold Bank 1

 

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Possible causes- Three way catalyst converter Bank 1- Exhaust tube- Intake air leaks- Fuel injectors may be faulty- Fuel injector leaks- Spark plugs may be faulty- Improper ignition timing- Engine Control Module (ECM)

 What does this mean?

When is the code detected?- Three way catalytic converter Bank 1 does not operate properly.- Three way catalyst converter Bank 1 does not have enough oxygen storage capacity.

Possible symptoms- Engine Light ON (or Service Engine Soon Warning Light)

P0420 2002 Nissan Sentra Description

The Engine Control Module (ECM) monitors the switching frequency ratio of heated oxygen sensors 1 (front O2 sensor) and heated oxygen sensors 2 (rear O2 sensor).

A three way catalyst converter (Manifold) with high oxygen storage capacity will indicate a low switching frequency of heated oxygen sensor 2. As oxygen storage capacity decreases, the heated oxygen sensor 2 switching frequency will increase.

When the frequency ratio of heated oxygen sensors 1 and 2 approaches a specified limit value, the three way catalyst malfunction is diagnosed.

Read more: http://engine-codes.com/p0420_2002_nissan_sentra.html#ixzz3h3TB7rWX

P0420 NissanP0420 Nissan - Catalyst System Efficiency Below Threshold Bank 1

 

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Possible causes- Three way catalyst converter Bank 1- Exhaust tube- Intake air leaks- Fuel injectors may be faulty- Fuel injector leaks- Spark plugs may be faulty- Improper ignition timing- Engine Control Module (ECM)

 What does this mean?

Tech notesAs the code description implies the P0420 code means that the vehicle's control module has detected that the three-way catalytic converter is not working properly (is not as efficient as the factory is expecting). Replacing the oxygen (O2) sensors may sometimes fix the code, but in most cases the catalytic convert needs to be replaced to fix the problem. If the P0420 code is combined with other codes, try fixing the other codes first.

Very common problem with Nissan vehicles. There are Nissan factory service bulletins for the following Nissan models:

2000 Nissan Maxima2001 Nissan Maxima2000-2001 Nissan Maxima Factory Service Bulletin OBDII Code P0420

2001 Nissan Frontier2001 Nissan Xterra2001 Nissan Frontier-Xterra Factory Service Bulletin OBDII Code P0420

2004 Nissan Altima2005 Nissan Altima2004-2005 Nissan Altima Factory Service Bulletin OBDII Code P0420

2004 Nissan Altima2005 Nissan Altima2006 Nissan Altima

2004-2006 Nissan Altima Factory Service Bulletin OBDII Code P0420

2005 Nissan Frontier2006 Nissan Frontier2005-2006 Nissan Frontier Factory Service Bulletin OBDII Code P0420

 What does this mean?

Read more: http://engine-codes.com/p0420_nissan.html#ixzz3h3SfgHy3

 What does this mean?

When is the code detected?- Three way catalytic converter Bank 1 does not operate properly.- Three way catalyst converter Bank 1 does not have enough oxygen storage capacity.

Possible symptoms- Engine Light ON (or Service Engine Soon Warning Light)

P0420 Nissan Description

The Engine Control Module (ECM) monitors the switching frequency ratio of heated oxygen sensors 1 (front O2 sensor) and heated oxygen sensors 2 (rear O2 sensor).

A three way catalyst converter (Manifold) with high oxygen storage capacity will indicate a low switching frequency of heated oxygen sensor 2. As oxygen storage capacity decreases, the heated oxygen sensor 2 switching frequency will increase.

When the frequency ratio of heated oxygen sensors 1 and 2 approaches a specified limit value, the three way catalyst malfunction is diagnosed.

Read more: http://engine-codes.com/p0420_nissan.html#ixzz3h3SrOykv