AutoCodes – Nissan – P0159 2005 Nissan Altima Sedan

P0159 2005 Nissan Altima Sedan Code - HO2S22 Slow Response

Quick Answer

The heated oxygen sensor 2 (HO2S), after three way catalyst (manifold), monitors the oxygen level in the exhaust gas on each bank. Common causes include Faulty Rear Heated Oxygen Sensor Bank 2, Rear Heated Oxygen Sensor Bank 2 harness is open or shorted, Rear Heated Oxygen Sensor Bank 2 circuit poor electrical connection. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means: P0159 2005 Nissan Altima Sedan indicates HO2S22 Slow Response.
Common causes: Common causes include Faulty Rear Heated Oxygen Sensor Bank 2, Rear Heated Oxygen Sensor Bank 2 harness is open or shorted, Rear Heated Oxygen Sensor Bank 2 circuit poor electrical connection.
Severity: Moderate - service should be scheduled soon.
Can I drive?: The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

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Code Popularity 2,884

How popular is this code, among other codes? Low

Repair Importance Level

Moderate (Service soon) (2 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0159 2005 Nissan Altima Sedan Description

The heated oxygen sensor 2 (HO2S), 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.

OBDII Code P0159 2005 Nissan Altima Sedan - HO2S22 Slow Response - AutoCodes.com — P0159 2005 Nissan Altima Sedan Code - HO2S22 Slow Response

What does this mean?

What are the Possible Causes of the DTC P0159 2005 Nissan Altima Sedan?

Faulty Rear Heated Oxygen Sensor Bank 2
Rear Heated Oxygen Sensor Bank 2 harness is open or shorted
Rear Heated Oxygen Sensor Bank 2 circuit poor electrical connection
Inappropriate fuel pressure
Faulty fuel injectors
Intake air leaks may be faulty
Exhaust gas leaks

How to Fix the DTC P0159 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.

What does this mean?

Code Tech Notes

Replacing the O2 Sensor 2 usually takes care of the problem

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0159 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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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0159 2005 Nissan Altima Sedan Code

1. What does the OBDII code P0159 on a 2005 Nissan Altima Sedan mean?

The code P0159 indicates a slow response from the HO2S22 sensor, which is the heated oxygen sensor located after the catalytic converter.

2. What are the common symptoms of a HO2S22 slow response code in a 2005 Nissan Altima Sedan?

Common symptoms include poor fuel economy, rough idling, hesitation or stalling during acceleration, and an illuminated check engine light.

3. What are the possible causes of the P0159 code on a 2005 Nissan Altima Sedan?

Potential causes may include a faulty HO2S22 sensor, wiring issues such as frayed or damaged wires, a vacuum leak, exhaust system leaks, or a malfunctioning catalytic converter.

4. How can I diagnose the HO2S22 slow response issue on a 2005 Nissan Altima Sedan?

Diagnosis typically involves using a scan tool to retrieve the trouble code, checking the sensor's wiring and connections for damage, inspecting the exhaust system for leaks, and testing the sensor's response using a multimeter.

5. Can I continue driving my 2005 Nissan Altima Sedan with the P0159 code?

While the vehicle may still be operable, it is not recommended to ignore the P0159 code, as it can lead to decreased fuel efficiency and potentially cause damage to the catalytic converter over time.

6. How can I repair the HO2S22 slow response issue on a 2005 Nissan Altima Sedan?

Repair options may include replacing the HO2S22 sensor, repairing or replacing damaged wiring, addressing any vacuum or exhaust leaks, and clearing the trouble code with a scan tool.

7. Is it possible to prevent the P0159 code from appearing on my 2005 Nissan Altima Sedan?

Regular maintenance, such as inspecting and replacing oxygen sensors as recommended by the manufacturer, can help prevent issues like the HO2S22 slow response code from occurring.

8. How much does it typically cost to repair the P0159 HO2S22 slow response code on a 2005 Nissan Altima Sedan?

The cost of repairs can vary depending on the exact cause of the issue, but it may range from around $100 to $400, including parts and labor.

9. Will resetting the check engine light resolve the P0159 code on a 2005 Nissan Altima Sedan?

Resetting the check engine light may temporarily turn it off, but if the underlying issue causing the P0159 code is not addressed, the light is likely to come back on after driving the vehicle for a while.

10. Can I fix the P0159 code on my 2005 Nissan Altima Sedan myself, or should I take it to a mechanic?

While some DIY enthusiasts may be able to diagnose and repair the P0159 code themselves, it is recommended to consult a professional mechanic for an accurate diagnosis and proper repair to ensure the issue is fully resolved.