P1273 2005 Nissan Altima Sedan Code - Air Fuel Ratio Sensor 1 Bank 1 Lean Shift Monitoring
Quick Answer
The Air Fuel Ratio (A/F) sensor is a planar dual-cell limit current sensor. Common causes include 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. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P1273 2005 Nissan Altima Sedan indicates Air Fuel Ratio Sensor 1 Bank 1 Lean Shift Monitoring.
- Common causes
- Common causes include 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.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P1273 2005 Nissan Altima Sedan Description
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 λ 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).
What are the Possible Causes of the DTC P1273 2005 Nissan Altima Sedan?
- 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
- Fuel pressure
- Faulty Fuel injector
- Faulty Air Flow Meter
How to Fix the DTC P1273 2005 Nissan Altima Sedan?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
Altima ECM Self-Learning procedure
There is a factory service bulletin for the 2005 Nissan Altima:
2005 Nissan Altima Factory Service Bulletin OBDII Code P1273
User Submitted Video
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1273 2005 Nissan Altima Sedan code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P1273 2005 Nissan Altima Sedan Code
1. What are the common symptoms of OBDII code P1273 on a 2005 Nissan Altima Sedan?
- Common symptoms include poor fuel economy, rough idling, lack of power, and the illumination of the check engine light.
2. What does the OBDII code P1273 on a 2005 Nissan Altima Sedan indicate?
- This code indicates an issue with the Air Fuel Ratio Sensor 1 Bank 1 Lean Shift Monitoring system.
3. What are the possible causes of OBDII code P1273 on a 2005 Nissan Altima Sedan?
- Possible causes include a faulty air fuel ratio sensor, vacuum leaks, fuel system issues, exhaust leaks, or a problem with the engine's air intake system.
4. How can I diagnose the OBDII code P1273 on a 2005 Nissan Altima Sedan?
- Diagnosing this code typically involves using an OBDII scanner to retrieve the code, inspecting the air fuel ratio sensor, checking for vacuum leaks, and testing the fuel system components.
5. Can I continue driving my 2005 Nissan Altima Sedan with the OBDII code P1273?
- It is not recommended to continue driving with this code illuminated, as it can lead to decreased fuel efficiency and potential engine damage if left unaddressed.
6. How can I repair OBDII code P1273 on my 2005 Nissan Altima Sedan?
- Repairing this code may involve replacing the air fuel ratio sensor, addressing any vacuum or exhaust leaks, checking and cleaning the fuel system components, and resetting the check engine light.
7. Are there any DIY tips for troubleshooting OBDII code P1273 on a 2005 Nissan Altima Sedan?
- DIY tips include visually inspecting the air fuel ratio sensor for damage, checking for loose or disconnected vacuum hoses, and ensuring the fuel system is delivering the correct pressure.
8. How much does it typically cost to repair OBDII code P1273 on a 2005 Nissan Altima Sedan?
- The cost of repairs can vary depending on the exact cause of the code, but it may range from $200 to $500 for parts and labor.
9. Can a mechanic easily fix OBDII code P1273 on a 2005 Nissan Altima Sedan?
- Yes, a qualified mechanic should be able to diagnose and repair this code efficiently, ensuring the vehicle runs smoothly and the issue is resolved.
10. How long does it take to repair OBDII code P1273 on a 2005 Nissan Altima Sedan?
- The repair time can vary based on the specific cause of the code and the availability of parts, but it typically takes a few hours to a full day to complete the necessary repairs.
Discuss the causes and fixes for P1273 2005 Nissan Altima Sedan OBDII Code
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Please check the "Possible Causes" above, there are many things that could cause the code to come ON. You could start by checking the sensors connector.
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Sure. What help do you need? What size of engine is in your Sentra 1.8L or 2.5L?
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OK. Now please tell me what help do you need?
If you just have the P1273 code, then you have to replace the Air fuel ratio (A/F) sensor 1 Bank 1 to fix the problem.
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I'm having the same code on my 04 altima. i tried the self learning method the engine lights goes away but comes back after a couple of hours of driving. i change both oxygen sensor.
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You changed both sensor and still getting the code? usually replacing the sensor takes care of the problem. Any exhaust leaks near the front sensor?
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Don't know yet. I'm taking it to AutoZone to get a diagnostic and see what's their advice.
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Have the same code p1273. Just had a "mechanic" try to clean out throttle body turns out he didnt disconnect the sensor and word is he "messed up" .so now i ordered a new throttle body .and just today put my scanner in my car and this code 1273 popped up. Could it be because of bad throttle body?
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Yes, its possible.
You have to the Idle Learning procedure: http://nissanhelp.com/diy/a...
Then clearing the "Self Learning" : http://nissanhelp.com/diy/a...
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What does it mean when the code says that it is a High/ Low Sensor. Low side open
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I have a p1273 and p0420
On my Nissan Altima 2005 3.5
When I only had the p0420 I took one of my catalytic converters off and clean it with thinner . Anyways the catalytic converter didn’t seem to be clog at all ..so I put it back on and the code remained . Now I still have a p0420 and p1273 as I mentioned .. I wonder if replacing one of those bank 1 sensor could help clean up the p1273 -
If there are no exhaust leaks, replacing the sensor should take care of the P1273, and it might take care of the P0420 code as well.
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